diff options
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/meta/fbnic/Makefile | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/meta/fbnic/fbnic_tlv.c | 529 | ||||
| -rw-r--r-- | drivers/net/ethernet/meta/fbnic/fbnic_tlv.h | 175 |
3 files changed, 706 insertions, 1 deletions
diff --git a/drivers/net/ethernet/meta/fbnic/Makefile b/drivers/net/ethernet/meta/fbnic/Makefile index b8f4511440dc..0434ee0b3069 100644 --- a/drivers/net/ethernet/meta/fbnic/Makefile +++ b/drivers/net/ethernet/meta/fbnic/Makefile @@ -10,4 +10,5 @@ obj-$(CONFIG_FBNIC) += fbnic.o fbnic-y := fbnic_devlink.o \ fbnic_irq.o \ fbnic_mac.o \ - fbnic_pci.o + fbnic_pci.o \ + fbnic_tlv.o diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_tlv.c b/drivers/net/ethernet/meta/fbnic/fbnic_tlv.c new file mode 100644 index 000000000000..2a174ab062a3 --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/fbnic_tlv.c @@ -0,0 +1,529 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) Meta Platforms, Inc. and affiliates. */ + +#include <linux/gfp.h> +#include <linux/mm.h> +#include <linux/once.h> +#include <linux/random.h> +#include <linux/string.h> +#include <uapi/linux/if_ether.h> + +#include "fbnic_tlv.h" + +/** + * fbnic_tlv_msg_alloc - Allocate page and initialize FW message header + * @msg_id: Identifier for new message we are starting + * + * Return: pointer to start of message, or NULL on failure. + * + * Allocates a page and initializes message header at start of page. + * Initial message size is 1 DWORD which is just the header. + **/ +struct fbnic_tlv_msg *fbnic_tlv_msg_alloc(u16 msg_id) +{ + struct fbnic_tlv_hdr hdr = { 0 }; + struct fbnic_tlv_msg *msg; + + msg = (struct fbnic_tlv_msg *)__get_free_page(GFP_KERNEL); + if (!msg) + return NULL; + + /* Start with zero filled header and then back fill with data */ + hdr.type = msg_id; + hdr.is_msg = 1; + hdr.len = cpu_to_le16(1); + + /* Copy header into start of message */ + msg->hdr = hdr; + + return msg; +} + +/** + * fbnic_tlv_attr_put_flag - Add flag value to message + * @msg: Message header we are adding flag attribute to + * @attr_id: ID of flag attribute we are adding to message + * + * Return: -ENOSPC if there is no room for the attribute. Otherwise 0. + * + * Adds a 1 DWORD flag attribute to the message. The presence of this + * attribute can be used as a boolean value indicating true, otherwise the + * value is considered false. + **/ +int fbnic_tlv_attr_put_flag(struct fbnic_tlv_msg *msg, const u16 attr_id) +{ + int attr_max_len = PAGE_SIZE - offset_in_page(msg) - sizeof(*msg); + struct fbnic_tlv_hdr hdr = { 0 }; + struct fbnic_tlv_msg *attr; + + attr_max_len -= le16_to_cpu(msg->hdr.len) * sizeof(u32); + if (attr_max_len < sizeof(*attr)) + return -ENOSPC; + + /* Get header pointer and bump attr to start of data */ + attr = &msg[le16_to_cpu(msg->hdr.len)]; + + /* Record attribute type and size */ + hdr.type = attr_id; + hdr.len = cpu_to_le16(sizeof(hdr)); + + attr->hdr = hdr; + le16_add_cpu(&msg->hdr.len, + FBNIC_TLV_MSG_SIZE(le16_to_cpu(hdr.len))); + + return 0; +} + +/** + * fbnic_tlv_attr_put_value - Add data to message + * @msg: Message header we are adding flag attribute to + * @attr_id: ID of flag attribute we are adding to message + * @value: Pointer to data to be stored + * @len: Size of data to be stored. + * + * Return: -ENOSPC if there is no room for the attribute. Otherwise 0. + * + * Adds header and copies data pointed to by value into the message. The + * result is rounded up to the nearest DWORD for sizing so that the + * headers remain aligned. + * + * The assumption is that the value field is in a format where byte + * ordering can be guaranteed such as a byte array or a little endian + * format. + **/ +int fbnic_tlv_attr_put_value(struct fbnic_tlv_msg *msg, const u16 attr_id, + const void *value, const int len) +{ + int attr_max_len = PAGE_SIZE - offset_in_page(msg) - sizeof(*msg); + struct fbnic_tlv_hdr hdr = { 0 }; + struct fbnic_tlv_msg *attr; + + attr_max_len -= le16_to_cpu(msg->hdr.len) * sizeof(u32); + if (attr_max_len < sizeof(*attr) + len) + return -ENOSPC; + + /* Get header pointer and bump attr to start of data */ + attr = &msg[le16_to_cpu(msg->hdr.len)]; + + /* Record attribute type and size */ + hdr.type = attr_id; + hdr.len = cpu_to_le16(sizeof(hdr) + len); + + /* Zero pad end of region to be written if we aren't aligned */ + if (len % sizeof(hdr)) + attr->value[len / sizeof(hdr)] = 0; + + /* Copy data over */ + memcpy(attr->value, value, len); + + attr->hdr = hdr; + le16_add_cpu(&msg->hdr.len, + FBNIC_TLV_MSG_SIZE(le16_to_cpu(hdr.len))); + + return 0; +} + +/** + * __fbnic_tlv_attr_put_int - Add integer to message + * @msg: Message header we are adding flag attribute to + * @attr_id: ID of flag attribute we are adding to message + * @value: Data to be stored + * @len: Size of data to be stored, either 4 or 8 bytes. + * + * Return: -ENOSPC if there is no room for the attribute. Otherwise 0. + * + * Adds header and copies data pointed to by value into the message. Will + * format the data as little endian. + **/ +int __fbnic_tlv_attr_put_int(struct fbnic_tlv_msg *msg, const u16 attr_id, + s64 value, const int len) +{ + __le64 le64_value = cpu_to_le64(value); + + return fbnic_tlv_attr_put_value(msg, attr_id, &le64_value, len); +} + +/** + * fbnic_tlv_attr_put_mac_addr - Add mac_addr to message + * @msg: Message header we are adding flag attribute to + * @attr_id: ID of flag attribute we are adding to message + * @mac_addr: Byte pointer to MAC address to be stored + * + * Return: -ENOSPC if there is no room for the attribute. Otherwise 0. + * + * Adds header and copies data pointed to by mac_addr into the message. Will + * copy the address raw so it will be in big endian with start of MAC + * address at start of attribute. + **/ +int fbnic_tlv_attr_put_mac_addr(struct fbnic_tlv_msg *msg, const u16 attr_id, + const u8 *mac_addr) +{ + return fbnic_tlv_attr_put_value(msg, attr_id, mac_addr, ETH_ALEN); +} + +/** + * fbnic_tlv_attr_put_string - Add string to message + * @msg: Message header we are adding flag attribute to + * @attr_id: ID of flag attribute we are adding to message + * @string: Byte pointer to null terminated string to be stored + * + * Return: -ENOSPC if there is no room for the attribute. Otherwise 0. + * + * Adds header and copies data pointed to by string into the message. Will + * copy the address raw so it will be in byte order. + **/ +int fbnic_tlv_attr_put_string(struct fbnic_tlv_msg *msg, u16 attr_id, + const char *string) +{ + int attr_max_len = PAGE_SIZE - sizeof(*msg); + int str_len = 1; + + /* The max length will be message minus existing message and new + * attribute header. Since the message is measured in DWORDs we have + * to multiply the size by 4. + * + * The string length doesn't include the \0 so we have to add one to + * the final value, so start with that as our initial value. + * + * We will verify if the string will fit in fbnic_tlv_attr_put_value() + */ + attr_max_len -= le16_to_cpu(msg->hdr.len) * sizeof(u32); + str_len += strnlen(string, attr_max_len); + + return fbnic_tlv_attr_put_value(msg, attr_id, string, str_len); +} + +/** + * fbnic_tlv_attr_get_unsigned - Retrieve unsigned value from result + * @attr: Attribute to retrieve data from + * + * Return: unsigned 64b value containing integer value + **/ +u64 fbnic_tlv_attr_get_unsigned(struct fbnic_tlv_msg *attr) +{ + __le64 le64_value = 0; + + memcpy(&le64_value, &attr->value[0], + le16_to_cpu(attr->hdr.len) - sizeof(*attr)); + + return le64_to_cpu(le64_value); +} + +/** + * fbnic_tlv_attr_get_signed - Retrieve signed value from result + * @attr: Attribute to retrieve data from + * + * Return: signed 64b value containing integer value + **/ +s64 fbnic_tlv_attr_get_signed(struct fbnic_tlv_msg *attr) +{ + int shift = (8 + sizeof(*attr) - le16_to_cpu(attr->hdr.len)) * 8; + __le64 le64_value = 0; + s64 value; + + /* Copy the value and adjust for byte ordering */ + memcpy(&le64_value, &attr->value[0], + le16_to_cpu(attr->hdr.len) - sizeof(*attr)); + value = le64_to_cpu(le64_value); + + /* Sign extend the return value by using a pair of shifts */ + return (value << shift) >> shift; +} + +/** + * fbnic_tlv_attr_get_string - Retrieve string value from result + * @attr: Attribute to retrieve data from + * @str: Pointer to an allocated string to store the data + * @max_size: The maximum size which can be in str + * + * Return: the size of the string read from firmware + **/ +size_t fbnic_tlv_attr_get_string(struct fbnic_tlv_msg *attr, char *str, + size_t max_size) +{ + max_size = min_t(size_t, max_size, + (le16_to_cpu(attr->hdr.len) * 4) - sizeof(*attr)); + memcpy(str, &attr->value, max_size); + + return max_size; +} + +/** + * fbnic_tlv_attr_nest_start - Add nested attribute header to message + * @msg: Message header we are adding flag attribute to + * @attr_id: ID of flag attribute we are adding to message + * + * Return: NULL if there is no room for the attribute. Otherwise a pointer + * to the new attribute header. + * + * New header length is stored initially in DWORDs. + **/ +struct fbnic_tlv_msg *fbnic_tlv_attr_nest_start(struct fbnic_tlv_msg *msg, + u16 attr_id) +{ + int attr_max_len = PAGE_SIZE - offset_in_page(msg) - sizeof(*msg); + struct fbnic_tlv_msg *attr = &msg[le16_to_cpu(msg->hdr.len)]; + struct fbnic_tlv_hdr hdr = { 0 }; + + /* Make sure we have space for at least the nest header plus one more */ + attr_max_len -= le16_to_cpu(msg->hdr.len) * sizeof(u32); + if (attr_max_len < sizeof(*attr) * 2) + return NULL; + + /* Record attribute type and size */ + hdr.type = attr_id; + + /* Add current message length to account for consumption within the + * page and leave it as a multiple of DWORDs, we will shift to + * bytes when we close it out. + */ + hdr.len = cpu_to_le16(1); + + attr->hdr = hdr; + + return attr; +} + +/** + * fbnic_tlv_attr_nest_stop - Close out nested attribute and add it to message + * @msg: Message header we are adding flag attribute to + * + * Closes out nested attribute, adds length to message, and then bumps + * length from DWORDs to bytes to match other attributes. + **/ +void fbnic_tlv_attr_nest_stop(struct fbnic_tlv_msg *msg) +{ + struct fbnic_tlv_msg *attr = &msg[le16_to_cpu(msg->hdr.len)]; + u16 len = le16_to_cpu(attr->hdr.len); + + /* Add attribute to message if there is more than just a header */ + if (len <= 1) + return; + + le16_add_cpu(&msg->hdr.len, len); + + /* Convert from DWORDs to bytes */ + attr->hdr.len = cpu_to_le16(len * sizeof(u32)); +} + +static int +fbnic_tlv_attr_validate(struct fbnic_tlv_msg *attr, + const struct fbnic_tlv_index *tlv_index) +{ + u16 len = le16_to_cpu(attr->hdr.len) - sizeof(*attr); + u16 attr_id = attr->hdr.type; + __le32 *value = &attr->value[0]; + + if (attr->hdr.is_msg) + return -EINVAL; + + if (attr_id >= FBNIC_TLV_RESULTS_MAX) + return -EINVAL; + + while (tlv_index->id != attr_id) { + if (tlv_index->id == FBNIC_TLV_ATTR_ID_UNKNOWN) { + if (attr->hdr.cannot_ignore) + return -ENOENT; + return le16_to_cpu(attr->hdr.len); + } + + tlv_index++; + } + + if (offset_in_page(attr) + len > PAGE_SIZE - sizeof(*attr)) + return -E2BIG; + + switch (tlv_index->type) { + case FBNIC_TLV_STRING: + if (!len || len > tlv_index->len) + return -EINVAL; + if (((char *)value)[len - 1]) + return -EINVAL; + break; + case FBNIC_TLV_FLAG: + if (len) + return -EINVAL; + break; + case FBNIC_TLV_UNSIGNED: + case FBNIC_TLV_SIGNED: + if (tlv_index->len > sizeof(__le64)) + return -EINVAL; + fallthrough; + case FBNIC_TLV_BINARY: + if (!len || len > tlv_index->len) + return -EINVAL; + break; + case FBNIC_TLV_NESTED: + case FBNIC_TLV_ARRAY: + if (len % 4) + return -EINVAL; + break; + default: + return -EINVAL; + } + + return 0; +} + +/** + * fbnic_tlv_attr_parse_array - Parse array of attributes into results array + * @attr: Start of attributes in the message + * @len: Length of attributes in the message + * @results: Array of pointers to store the results of parsing + * @tlv_index: List of TLV attributes to be parsed from message + * @tlv_attr_id: Specific ID that is repeated in array + * @array_len: Number of results to store in results array + * + * Return: zero on success, or negative value on error. + * + * Will take a list of attributes and a parser definition and will capture + * the results in the results array to have the data extracted later. + **/ +int fbnic_tlv_attr_parse_array(struct fbnic_tlv_msg *attr, int len, + struct fbnic_tlv_msg **results, + const struct fbnic_tlv_index *tlv_index, + u16 tlv_attr_id, size_t array_len) +{ + int i = 0; + + /* Initialize results table to NULL. */ + memset(results, 0, array_len * sizeof(results[0])); + + /* Nothing to parse if header was only thing there */ + if (!len) + return 0; + + /* Work through list of attributes, parsing them as necessary */ + while (len > 0) { + u16 attr_id = attr->hdr.type; + u16 attr_len; + int err; + + if (tlv_attr_id != attr_id) + return -EINVAL; + + /* Stop parsing on full error */ + err = fbnic_tlv_attr_validate(attr, tlv_index); + if (err < 0) + return err; + + if (i >= array_len) + return -ENOSPC; + + results[i++] = attr; + + attr_len = FBNIC_TLV_MSG_SIZE(le16_to_cpu(attr->hdr.len)); + len -= attr_len; + attr += attr_len; + } + + return len == 0 ? 0 : -EINVAL; +} + +/** + * fbnic_tlv_attr_parse - Parse attributes into a list of attribute results + * @attr: Start of attributes in the message + * @len: Length of attributes in the message + * @results: Array of pointers to store the results of parsing + * @tlv_index: List of TLV attributes to be parsed from message + * + * Return: zero on success, or negative value on error. + * + * Will take a list of attributes and a parser definition and will capture + * the results in the results array to have the data extracted later. + **/ +int fbnic_tlv_attr_parse(struct fbnic_tlv_msg *attr, int len, + struct fbnic_tlv_msg **results, + const struct fbnic_tlv_index *tlv_index) +{ + /* Initialize results table to NULL. */ + memset(results, 0, sizeof(results[0]) * FBNIC_TLV_RESULTS_MAX); + + /* Nothing to parse if header was only thing there */ + if (!len) + return 0; + + /* Work through list of attributes, parsing them as necessary */ + while (len > 0) { + int err = fbnic_tlv_attr_validate(attr, tlv_index); + u16 attr_id = attr->hdr.type; + u16 attr_len; + + /* Stop parsing on full error */ + if (err < 0) + return err; + + /* Ignore results for unsupported values */ + if (!err) { + /* Do not overwrite existing entries */ + if (results[attr_id]) + return -EADDRINUSE; + + results[attr_id] = attr; + } + + attr_len = FBNIC_TLV_MSG_SIZE(le16_to_cpu(attr->hdr.len)); + len -= attr_len; + attr += attr_len; + } + + return len == 0 ? 0 : -EINVAL; +} + +/** + * fbnic_tlv_msg_parse - Parse message and process via predetermined functions + * @opaque: Value passed to parser function to enable driver access + * @msg: Message to be parsed. + * @parser: TLV message parser definition. + * + * Return: zero on success, or negative value on error. + * + * Will take a message a number of message types via the attribute parsing + * definitions and function provided for the parser array. + **/ +int fbnic_tlv_msg_parse(void *opaque, struct fbnic_tlv_msg *msg, + const struct fbnic_tlv_parser *parser) +{ + struct fbnic_tlv_msg *results[FBNIC_TLV_RESULTS_MAX]; + u16 msg_id = msg->hdr.type; + int err; + + if (!msg->hdr.is_msg) + return -EINVAL; + + if (le16_to_cpu(msg->hdr.len) > PAGE_SIZE / sizeof(u32)) + return -E2BIG; + + while (parser->id != msg_id) { + if (parser->id == FBNIC_TLV_MSG_ID_UNKNOWN) + return -ENOENT; + parser++; + } + + err = fbnic_tlv_attr_parse(&msg[1], le16_to_cpu(msg->hdr.len) - 1, + results, parser->attr); + if (err) + return err; + + return parser->func(opaque, results); +} + +/** + * fbnic_tlv_parser_error - called if message doesn't match known type + * @opaque: (unused) + * @results: (unused) + * + * Return: -EBADMSG to indicate the message is an unsupported type + **/ +int fbnic_tlv_parser_error(void *opaque, struct fbnic_tlv_msg **results) +{ + return -EBADMSG; +} + +void fbnic_tlv_attr_addr_copy(u8 *dest, struct fbnic_tlv_msg *src) +{ + u8 *mac_addr; + + mac_addr = fbnic_tlv_attr_get_value_ptr(src); + memcpy(dest, mac_addr, ETH_ALEN); +} diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_tlv.h b/drivers/net/ethernet/meta/fbnic/fbnic_tlv.h new file mode 100644 index 000000000000..67300ab44353 --- /dev/null +++ b/drivers/net/ethernet/meta/fbnic/fbnic_tlv.h @@ -0,0 +1,175 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) Meta Platforms, Inc. and affiliates. */ + +#ifndef _FBNIC_TLV_H_ +#define _FBNIC_TLV_H_ + +#include <asm/byteorder.h> +#include <linux/bits.h> +#include <linux/const.h> +#include <linux/types.h> + +#define FBNIC_TLV_MSG_ALIGN(len) ALIGN(len, sizeof(u32)) +#define FBNIC_TLV_MSG_SIZE(len) \ + (FBNIC_TLV_MSG_ALIGN(len) / sizeof(u32)) + +/* TLV Header Format + * 3 2 1 + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Length |M|I|RSV| Type / ID | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * + * The TLV header format described above will be used for transferring + * messages between the host and the firmware. To ensure byte ordering + * we have defined all fields as being little endian. + * Type/ID: Identifier for message and/or attribute + * RSV: Reserved field for future use, likely as additional flags + * I: cannot_ignore flag, identifies if unrecognized attribute can be ignored + * M: is_msg, indicates that this is the start of a new message + * Length: Total length of message in dwords including header + * or + * Total length of attribute in bytes including header + */ +struct fbnic_tlv_hdr { +#if defined(__LITTLE_ENDIAN_BITFIELD) + u16 type : 12; /* 0 .. 11 Type / ID */ + u16 rsvd : 2; /* 12 .. 13 Reserved for future use */ + u16 cannot_ignore : 1; /* 14 Attribute can be ignored */ + u16 is_msg : 1; /* 15 Header belongs to message */ +#elif defined(__BIG_ENDIAN_BITFIELD) + u16 is_msg : 1; /* 15 Header belongs to message */ + u16 cannot_ignore : 1; /* 14 Attribute can be ignored */ + u16 rsvd : 2; /* 13 .. 12 Reserved for future use */ + u16 type : 12; /* 11 .. 0 Type / ID */ +#else +#error "Missing defines from byteorder.h" +#endif + __le16 len; /* 16 .. 32 length including TLV header */ +}; + +#define FBNIC_TLV_RESULTS_MAX 32 + +struct fbnic_tlv_msg { + struct fbnic_tlv_hdr hdr; + __le32 value[]; +}; + +#define FBNIC_TLV_MSG_ID_UNKNOWN USHRT_MAX + +enum fbnic_tlv_type { + FBNIC_TLV_STRING, + FBNIC_TLV_FLAG, + FBNIC_TLV_UNSIGNED, + FBNIC_TLV_SIGNED, + FBNIC_TLV_BINARY, + FBNIC_TLV_NESTED, + FBNIC_TLV_ARRAY, + __FBNIC_TLV_MAX_TYPE +}; + +/* TLV Index + * Defines the relationship between the attribute IDs and their types. + * For each entry in the index there will be a size and type associated + * with it so that we can use this to parse the data and verify it matches + * the expected layout. + */ +struct fbnic_tlv_index { + u16 id; + u16 len; + enum fbnic_tlv_type type; +}; + +#define TLV_MAX_DATA (PAGE_SIZE - 512) +#define FBNIC_TLV_ATTR_ID_UNKNOWN USHRT_MAX +#define FBNIC_TLV_ATTR_STRING(id, len) { id, len, FBNIC_TLV_STRING } +#define FBNIC_TLV_ATTR_FLAG(id) { id, 0, FBNIC_TLV_FLAG } +#define FBNIC_TLV_ATTR_U32(id) { id, sizeof(u32), FBNIC_TLV_UNSIGNED } +#define FBNIC_TLV_ATTR_U64(id) { id, sizeof(u64), FBNIC_TLV_UNSIGNED } +#define FBNIC_TLV_ATTR_S32(id) { id, sizeof(s32), FBNIC_TLV_SIGNED } +#define FBNIC_TLV_ATTR_S64(id) { id, sizeof(s64), FBNIC_TLV_SIGNED } +#define FBNIC_TLV_ATTR_MAC_ADDR(id) { id, ETH_ALEN, FBNIC_TLV_BINARY } +#define FBNIC_TLV_ATTR_NESTED(id) { id, 0, FBNIC_TLV_NESTED } +#define FBNIC_TLV_ATTR_ARRAY(id) { id, 0, FBNIC_TLV_ARRAY } +#define FBNIC_TLV_ATTR_RAW_DATA(id) { id, TLV_MAX_DATA, FBNIC_TLV_BINARY } +#define FBNIC_TLV_ATTR_LAST { FBNIC_TLV_ATTR_ID_UNKNOWN, 0, 0 } + +struct fbnic_tlv_parser { + u16 id; + const struct fbnic_tlv_index *attr; + int (*func)(void *opaque, + struct fbnic_tlv_msg **results); +}; + +#define FBNIC_TLV_PARSER(id, attr, func) { FBNIC_TLV_MSG_ID_##id, attr, func } + +static inline void * +fbnic_tlv_attr_get_value_ptr(struct fbnic_tlv_msg *attr) +{ + return (void *)&attr->value[0]; +} + +static inline bool fbnic_tlv_attr_get_bool(struct fbnic_tlv_msg *attr) +{ + return !!attr; +} + +u64 fbnic_tlv_attr_get_unsigned(struct fbnic_tlv_msg *attr); +s64 fbnic_tlv_attr_get_signed(struct fbnic_tlv_msg *attr); +size_t fbnic_tlv_attr_get_string(struct fbnic_tlv_msg *attr, char *str, + size_t max_size); + +#define get_unsigned_result(id, location) \ +do { \ + struct fbnic_tlv_msg *result = results[id]; \ + if (result) \ + location = fbnic_tlv_attr_get_unsigned(result); \ +} while (0) + +#define get_signed_result(id, location) \ +do { \ + struct fbnic_tlv_msg *result = results[id]; \ + if (result) \ + location = fbnic_tlv_attr_get_signed(result); \ +} while (0) + +#define get_string_result(id, size, str, max_size) \ +do { \ + struct fbnic_tlv_msg *result = results[id]; \ + if (result) \ + size = fbnic_tlv_attr_get_string(result, str, max_size); \ +} while (0) + +#define get_bool(id) (!!(results[id])) + +struct fbnic_tlv_msg *fbnic_tlv_msg_alloc(u16 msg_id); +int fbnic_tlv_attr_put_flag(struct fbnic_tlv_msg *msg, const u16 attr_id); +int fbnic_tlv_attr_put_value(struct fbnic_tlv_msg *msg, const u16 attr_id, + const void *value, const int len); +int __fbnic_tlv_attr_put_int(struct fbnic_tlv_msg *msg, const u16 attr_id, + s64 value, const int len); +#define fbnic_tlv_attr_put_int(msg, attr_id, value) \ + __fbnic_tlv_attr_put_int(msg, attr_id, value, \ + FBNIC_TLV_MSG_ALIGN(sizeof(value))) +int fbnic_tlv_attr_put_mac_addr(struct fbnic_tlv_msg *msg, const u16 attr_id, + const u8 *mac_addr); +int fbnic_tlv_attr_put_string(struct fbnic_tlv_msg *msg, u16 attr_id, + const char *string); +struct fbnic_tlv_msg *fbnic_tlv_attr_nest_start(struct fbnic_tlv_msg *msg, + u16 attr_id); +void fbnic_tlv_attr_nest_stop(struct fbnic_tlv_msg *msg); +void fbnic_tlv_attr_addr_copy(u8 *dest, struct fbnic_tlv_msg *src); +int fbnic_tlv_attr_parse_array(struct fbnic_tlv_msg *attr, int len, + struct fbnic_tlv_msg **results, + const struct fbnic_tlv_index *tlv_index, + u16 tlv_attr_id, size_t array_len); +int fbnic_tlv_attr_parse(struct fbnic_tlv_msg *attr, int len, + struct fbnic_tlv_msg **results, + const struct fbnic_tlv_index *tlv_index); +int fbnic_tlv_msg_parse(void *opaque, struct fbnic_tlv_msg *msg, + const struct fbnic_tlv_parser *parser); +int fbnic_tlv_parser_error(void *opaque, struct fbnic_tlv_msg **results); + +#define FBNIC_TLV_MSG_ERROR \ + FBNIC_TLV_PARSER(UNKNOWN, NULL, fbnic_tlv_parser_error) +#endif /* _FBNIC_TLV_H_ */ |