544 lines
14 KiB
C
544 lines
14 KiB
C
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/* Intel Ethernet Switch Host Interface Driver
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* Copyright(c) 2013 - 2014 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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* Contact Information:
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* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*/
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#include "fm10k_tlv.h"
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/**
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* fm10k_tlv_msg_init - Initialize message block for TLV data storage
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* @msg: Pointer to message block
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* @msg_id: Message ID indicating message type
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*
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* This function return success if provided with a valid message pointer
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**/
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s32 fm10k_tlv_msg_init(u32 *msg, u16 msg_id)
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{
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/* verify pointer is not NULL */
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if (!msg)
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return FM10K_ERR_PARAM;
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*msg = (FM10K_TLV_FLAGS_MSG << FM10K_TLV_FLAGS_SHIFT) | msg_id;
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return 0;
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}
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/**
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* fm10k_tlv_attr_put_null_string - Place null terminated string on message
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* @msg: Pointer to message block
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* @attr_id: Attribute ID
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* @string: Pointer to string to be stored in attribute
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*
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* This function will reorder a string to be CPU endian and store it in
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* the attribute buffer. It will return success if provided with a valid
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* pointers.
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**/
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s32 fm10k_tlv_attr_put_null_string(u32 *msg, u16 attr_id,
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const unsigned char *string)
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{
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u32 attr_data = 0, len = 0;
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u32 *attr;
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/* verify pointers are not NULL */
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if (!string || !msg)
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return FM10K_ERR_PARAM;
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attr = &msg[FM10K_TLV_DWORD_LEN(*msg)];
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/* copy string into local variable and then write to msg */
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do {
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/* write data to message */
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if (len && !(len % 4)) {
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attr[len / 4] = attr_data;
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attr_data = 0;
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}
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/* record character to offset location */
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attr_data |= (u32)(*string) << (8 * (len % 4));
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len++;
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/* test for NULL and then increment */
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} while (*(string++));
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/* write last piece of data to message */
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attr[(len + 3) / 4] = attr_data;
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/* record attribute header, update message length */
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len <<= FM10K_TLV_LEN_SHIFT;
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attr[0] = len | attr_id;
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/* add header length to length */
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len += FM10K_TLV_HDR_LEN << FM10K_TLV_LEN_SHIFT;
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*msg += FM10K_TLV_LEN_ALIGN(len);
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return 0;
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}
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/**
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* fm10k_tlv_attr_get_null_string - Get null terminated string from attribute
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* @attr: Pointer to attribute
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* @string: Pointer to location of destination string
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*
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* This function pulls the string back out of the attribute and will place
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* it in the array pointed by by string. It will return success if provided
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* with a valid pointers.
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**/
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s32 fm10k_tlv_attr_get_null_string(u32 *attr, unsigned char *string)
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{
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u32 len;
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/* verify pointers are not NULL */
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if (!string || !attr)
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return FM10K_ERR_PARAM;
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len = *attr >> FM10K_TLV_LEN_SHIFT;
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attr++;
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while (len--)
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string[len] = (u8)(attr[len / 4] >> (8 * (len % 4)));
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return 0;
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}
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/**
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* fm10k_tlv_attr_put_mac_vlan - Store MAC/VLAN attribute in message
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* @msg: Pointer to message block
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* @attr_id: Attribute ID
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* @mac_addr: MAC address to be stored
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*
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* This function will reorder a MAC address to be CPU endian and store it
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* in the attribute buffer. It will return success if provided with a
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* valid pointers.
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**/
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s32 fm10k_tlv_attr_put_mac_vlan(u32 *msg, u16 attr_id,
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const u8 *mac_addr, u16 vlan)
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{
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u32 len = ETH_ALEN << FM10K_TLV_LEN_SHIFT;
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u32 *attr;
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/* verify pointers are not NULL */
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if (!msg || !mac_addr)
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return FM10K_ERR_PARAM;
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attr = &msg[FM10K_TLV_DWORD_LEN(*msg)];
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/* record attribute header, update message length */
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attr[0] = len | attr_id;
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/* copy value into local variable and then write to msg */
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attr[1] = le32_to_cpu(*(const __le32 *)&mac_addr[0]);
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attr[2] = le16_to_cpu(*(const __le16 *)&mac_addr[4]);
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attr[2] |= (u32)vlan << 16;
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/* add header length to length */
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len += FM10K_TLV_HDR_LEN << FM10K_TLV_LEN_SHIFT;
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*msg += FM10K_TLV_LEN_ALIGN(len);
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return 0;
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}
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/**
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* fm10k_tlv_attr_get_mac_vlan - Get MAC/VLAN stored in attribute
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* @attr: Pointer to attribute
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* @attr_id: Attribute ID
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* @mac_addr: location of buffer to store MAC address
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*
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* This function pulls the MAC address back out of the attribute and will
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* place it in the array pointed by by mac_addr. It will return success
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* if provided with a valid pointers.
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**/
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s32 fm10k_tlv_attr_get_mac_vlan(u32 *attr, u8 *mac_addr, u16 *vlan)
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{
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/* verify pointers are not NULL */
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if (!mac_addr || !attr)
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return FM10K_ERR_PARAM;
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*(__le32 *)&mac_addr[0] = cpu_to_le32(attr[1]);
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*(__le16 *)&mac_addr[4] = cpu_to_le16((u16)(attr[2]));
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*vlan = (u16)(attr[2] >> 16);
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return 0;
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}
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/**
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* fm10k_tlv_attr_put_bool - Add header indicating value "true"
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* @msg: Pointer to message block
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* @attr_id: Attribute ID
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*
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* This function will simply add an attribute header, the fact
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* that the header is here means the attribute value is true, else
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* it is false. The function will return success if provided with a
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* valid pointers.
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**/
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s32 fm10k_tlv_attr_put_bool(u32 *msg, u16 attr_id)
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{
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/* verify pointers are not NULL */
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if (!msg)
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return FM10K_ERR_PARAM;
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/* record attribute header */
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msg[FM10K_TLV_DWORD_LEN(*msg)] = attr_id;
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/* add header length to length */
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*msg += FM10K_TLV_HDR_LEN << FM10K_TLV_LEN_SHIFT;
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return 0;
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}
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/**
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* fm10k_tlv_attr_put_value - Store integer value attribute in message
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* @msg: Pointer to message block
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* @attr_id: Attribute ID
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* @value: Value to be written
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* @len: Size of value
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*
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* This function will place an integer value of up to 8 bytes in size
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* in a message attribute. The function will return success provided
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* that msg is a valid pointer, and len is 1, 2, 4, or 8.
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**/
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s32 fm10k_tlv_attr_put_value(u32 *msg, u16 attr_id, s64 value, u32 len)
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{
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u32 *attr;
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/* verify non-null msg and len is 1, 2, 4, or 8 */
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if (!msg || !len || len > 8 || (len & (len - 1)))
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return FM10K_ERR_PARAM;
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attr = &msg[FM10K_TLV_DWORD_LEN(*msg)];
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if (len < 4) {
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attr[1] = (u32)value & ((0x1ul << (8 * len)) - 1);
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} else {
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attr[1] = (u32)value;
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if (len > 4)
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attr[2] = (u32)(value >> 32);
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}
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/* record attribute header, update message length */
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len <<= FM10K_TLV_LEN_SHIFT;
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attr[0] = len | attr_id;
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/* add header length to length */
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len += FM10K_TLV_HDR_LEN << FM10K_TLV_LEN_SHIFT;
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*msg += FM10K_TLV_LEN_ALIGN(len);
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return 0;
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}
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/**
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* fm10k_tlv_attr_get_value - Get integer value stored in attribute
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* @attr: Pointer to attribute
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* @value: Pointer to destination buffer
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* @len: Size of value
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*
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* This function will place an integer value of up to 8 bytes in size
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* in the offset pointed to by value. The function will return success
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* provided that pointers are valid and the len value matches the
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* attribute length.
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**/
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s32 fm10k_tlv_attr_get_value(u32 *attr, void *value, u32 len)
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{
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/* verify pointers are not NULL */
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if (!attr || !value)
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return FM10K_ERR_PARAM;
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if ((*attr >> FM10K_TLV_LEN_SHIFT) != len)
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return FM10K_ERR_PARAM;
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if (len == 8)
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*(u64 *)value = ((u64)attr[2] << 32) | attr[1];
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else if (len == 4)
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*(u32 *)value = attr[1];
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else if (len == 2)
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*(u16 *)value = (u16)attr[1];
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else
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*(u8 *)value = (u8)attr[1];
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return 0;
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}
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/**
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* fm10k_tlv_attr_put_le_struct - Store little endian structure in message
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* @msg: Pointer to message block
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* @attr_id: Attribute ID
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* @le_struct: Pointer to structure to be written
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* @len: Size of le_struct
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*
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* This function will place a little endian structure value in a message
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* attribute. The function will return success provided that all pointers
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* are valid and length is a non-zero multiple of 4.
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**/
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s32 fm10k_tlv_attr_put_le_struct(u32 *msg, u16 attr_id,
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const void *le_struct, u32 len)
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{
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const __le32 *le32_ptr = (const __le32 *)le_struct;
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u32 *attr;
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u32 i;
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/* verify non-null msg and len is in 32 bit words */
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if (!msg || !len || (len % 4))
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return FM10K_ERR_PARAM;
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attr = &msg[FM10K_TLV_DWORD_LEN(*msg)];
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/* copy le32 structure into host byte order at 32b boundaries */
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for (i = 0; i < (len / 4); i++)
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attr[i + 1] = le32_to_cpu(le32_ptr[i]);
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/* record attribute header, update message length */
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len <<= FM10K_TLV_LEN_SHIFT;
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attr[0] = len | attr_id;
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/* add header length to length */
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len += FM10K_TLV_HDR_LEN << FM10K_TLV_LEN_SHIFT;
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*msg += FM10K_TLV_LEN_ALIGN(len);
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return 0;
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}
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/**
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* fm10k_tlv_attr_get_le_struct - Get little endian struct form attribute
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* @attr: Pointer to attribute
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* @le_struct: Pointer to structure to be written
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* @len: Size of structure
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*
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* This function will place a little endian structure in the buffer
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* pointed to by le_struct. The function will return success
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* provided that pointers are valid and the len value matches the
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* attribute length.
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**/
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s32 fm10k_tlv_attr_get_le_struct(u32 *attr, void *le_struct, u32 len)
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{
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__le32 *le32_ptr = (__le32 *)le_struct;
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u32 i;
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/* verify pointers are not NULL */
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if (!le_struct || !attr)
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return FM10K_ERR_PARAM;
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if ((*attr >> FM10K_TLV_LEN_SHIFT) != len)
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return FM10K_ERR_PARAM;
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attr++;
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for (i = 0; len; i++, len -= 4)
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le32_ptr[i] = cpu_to_le32(attr[i]);
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return 0;
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}
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/**
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* fm10k_tlv_attr_nest_start - Start a set of nested attributes
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* @msg: Pointer to message block
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* @attr_id: Attribute ID
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*
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* This function will mark off a new nested region for encapsulating
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* a given set of attributes. The idea is if you wish to place a secondary
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* structure within the message this mechanism allows for that. The
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* function will return NULL on failure, and a pointer to the start
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* of the nested attributes on success.
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**/
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u32 *fm10k_tlv_attr_nest_start(u32 *msg, u16 attr_id)
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{
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u32 *attr;
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/* verify pointer is not NULL */
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if (!msg)
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return NULL;
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attr = &msg[FM10K_TLV_DWORD_LEN(*msg)];
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attr[0] = attr_id;
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/* return pointer to nest header */
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return attr;
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}
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/**
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||
|
|
* fm10k_tlv_attr_nest_start - Start a set of nested attributes
|
||
|
|
* @msg: Pointer to message block
|
||
|
|
*
|
||
|
|
* This function closes off an existing set of nested attributes. The
|
||
|
|
* message pointer should be pointing to the parent of the nest. So in
|
||
|
|
* the case of a nest within the nest this would be the outer nest pointer.
|
||
|
|
* This function will return success provided all pointers are valid.
|
||
|
|
**/
|
||
|
|
s32 fm10k_tlv_attr_nest_stop(u32 *msg)
|
||
|
|
{
|
||
|
|
u32 *attr;
|
||
|
|
u32 len;
|
||
|
|
|
||
|
|
/* verify pointer is not NULL */
|
||
|
|
if (!msg)
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
|
||
|
|
/* locate the nested header and retrieve its length */
|
||
|
|
attr = &msg[FM10K_TLV_DWORD_LEN(*msg)];
|
||
|
|
len = (attr[0] >> FM10K_TLV_LEN_SHIFT) << FM10K_TLV_LEN_SHIFT;
|
||
|
|
|
||
|
|
/* only include nest if data was added to it */
|
||
|
|
if (len) {
|
||
|
|
len += FM10K_TLV_HDR_LEN << FM10K_TLV_LEN_SHIFT;
|
||
|
|
*msg += len;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* fm10k_tlv_attr_validate - Validate attribute metadata
|
||
|
|
* @attr: Pointer to attribute
|
||
|
|
* @tlv_attr: Type and length info for attribute
|
||
|
|
*
|
||
|
|
* This function does some basic validation of the input TLV. It
|
||
|
|
* verifies the length, and in the case of null terminated strings
|
||
|
|
* it verifies that the last byte is null. The function will
|
||
|
|
* return FM10K_ERR_PARAM if any attribute is malformed, otherwise
|
||
|
|
* it returns 0.
|
||
|
|
**/
|
||
|
|
static s32 fm10k_tlv_attr_validate(u32 *attr,
|
||
|
|
const struct fm10k_tlv_attr *tlv_attr)
|
||
|
|
{
|
||
|
|
u32 attr_id = *attr & FM10K_TLV_ID_MASK;
|
||
|
|
u16 len = *attr >> FM10K_TLV_LEN_SHIFT;
|
||
|
|
|
||
|
|
/* verify this is an attribute and not a message */
|
||
|
|
if (*attr & (FM10K_TLV_FLAGS_MSG << FM10K_TLV_FLAGS_SHIFT))
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
|
||
|
|
/* search through the list of attributes to find a matching ID */
|
||
|
|
while (tlv_attr->id < attr_id)
|
||
|
|
tlv_attr++;
|
||
|
|
|
||
|
|
/* if didn't find a match then we should exit */
|
||
|
|
if (tlv_attr->id != attr_id)
|
||
|
|
return FM10K_NOT_IMPLEMENTED;
|
||
|
|
|
||
|
|
/* move to start of attribute data */
|
||
|
|
attr++;
|
||
|
|
|
||
|
|
switch (tlv_attr->type) {
|
||
|
|
case FM10K_TLV_NULL_STRING:
|
||
|
|
if (!len ||
|
||
|
|
(attr[(len - 1) / 4] & (0xFF << (8 * ((len - 1) % 4)))))
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
if (len > tlv_attr->len)
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
break;
|
||
|
|
case FM10K_TLV_MAC_ADDR:
|
||
|
|
if (len != ETH_ALEN)
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
break;
|
||
|
|
case FM10K_TLV_BOOL:
|
||
|
|
if (len)
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
break;
|
||
|
|
case FM10K_TLV_UNSIGNED:
|
||
|
|
case FM10K_TLV_SIGNED:
|
||
|
|
if (len != tlv_attr->len)
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
break;
|
||
|
|
case FM10K_TLV_LE_STRUCT:
|
||
|
|
/* struct must be 4 byte aligned */
|
||
|
|
if ((len % 4) || len != tlv_attr->len)
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
break;
|
||
|
|
case FM10K_TLV_NESTED:
|
||
|
|
/* nested attributes must be 4 byte aligned */
|
||
|
|
if (len % 4)
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
/* attribute id is mapped to bad value */
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* fm10k_tlv_attr_parse - Parses stream of attribute data
|
||
|
|
* @attr: Pointer to attribute list
|
||
|
|
* @results: Pointer array to store pointers to attributes
|
||
|
|
* @tlv_attr: Type and length info for attributes
|
||
|
|
*
|
||
|
|
* This function validates a stream of attributes and parses them
|
||
|
|
* up into an array of pointers stored in results. The function will
|
||
|
|
* return FM10K_ERR_PARAM on any input or message error,
|
||
|
|
* FM10K_NOT_IMPLEMENTED for any attribute that is outside of the array
|
||
|
|
* and 0 on success.
|
||
|
|
**/
|
||
|
|
s32 fm10k_tlv_attr_parse(u32 *attr, u32 **results,
|
||
|
|
const struct fm10k_tlv_attr *tlv_attr)
|
||
|
|
{
|
||
|
|
u32 i, attr_id, offset = 0;
|
||
|
|
s32 err = 0;
|
||
|
|
u16 len;
|
||
|
|
|
||
|
|
/* verify pointers are not NULL */
|
||
|
|
if (!attr || !results)
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
|
||
|
|
/* initialize results to NULL */
|
||
|
|
for (i = 0; i < FM10K_TLV_RESULTS_MAX; i++)
|
||
|
|
results[i] = NULL;
|
||
|
|
|
||
|
|
/* pull length from the message header */
|
||
|
|
len = *attr >> FM10K_TLV_LEN_SHIFT;
|
||
|
|
|
||
|
|
/* no attributes to parse if there is no length */
|
||
|
|
if (!len)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
/* no attributes to parse, just raw data, message becomes attribute */
|
||
|
|
if (!tlv_attr) {
|
||
|
|
results[0] = attr;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* move to start of attribute data */
|
||
|
|
attr++;
|
||
|
|
|
||
|
|
/* run through list parsing all attributes */
|
||
|
|
while (offset < len) {
|
||
|
|
attr_id = *attr & FM10K_TLV_ID_MASK;
|
||
|
|
|
||
|
|
if (attr_id < FM10K_TLV_RESULTS_MAX)
|
||
|
|
err = fm10k_tlv_attr_validate(attr, tlv_attr);
|
||
|
|
else
|
||
|
|
err = FM10K_NOT_IMPLEMENTED;
|
||
|
|
|
||
|
|
if (err < 0)
|
||
|
|
return err;
|
||
|
|
if (!err)
|
||
|
|
results[attr_id] = attr;
|
||
|
|
|
||
|
|
/* update offset */
|
||
|
|
offset += FM10K_TLV_DWORD_LEN(*attr) * 4;
|
||
|
|
|
||
|
|
/* move to next attribute */
|
||
|
|
attr = &attr[FM10K_TLV_DWORD_LEN(*attr)];
|
||
|
|
}
|
||
|
|
|
||
|
|
/* we should find ourselves at the end of the list */
|
||
|
|
if (offset != len)
|
||
|
|
return FM10K_ERR_PARAM;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|