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/*
* twa.h:
*
* Copyright (c) 2017 James McKenzie <foss@madingley.org>,
* All rights reserved.
*
*/
#ifndef _TWA_H_
#define _TWA_H_
#define TWA_PACKED __attribute__ (( packed ))
typedef uint64_t dma_addr_t;
#define TW_SENSE_DATA_LENGTH 18
#define TW_COMMAND_SIZE (sizeof(dma_addr_t) > 4 ? 5 : 4)
#define TW_APACHE_MAX_SGL_LENGTH (sizeof(dma_addr_t) > 4 ? 72 : 109)
#define TW_ESCALADE_MAX_SGL_LENGTH (sizeof(dma_addr_t) > 4 ? 41 : 62)
#define TW_PADDING_LENGTH (sizeof(dma_addr_t) > 4 ? 8 : 0)
typedef struct TWA_PACKED TAG_TW_SG_Entry
{
dma_addr_t address;
uint32_t length;
} TW_SG_Entry;
typedef struct TWA_PACKED TAG_TW_Command_Apache_Header
{
unsigned char sense_data[TW_SENSE_DATA_LENGTH];
struct TWA_PACKED
{
char reserved[4];
unsigned short error;
unsigned char padding;
unsigned char severity__reserved;
} status_block;
unsigned char err_specific_desc[98];
struct TWA_PACKED
{
unsigned char size_header;
unsigned short reserved;
unsigned char size_sense;
} header_desc;
} TW_Command_Apache_Header;
/* Command Packet */
typedef struct TWA_PACKED TW_Command
{
/* First DWORD */
struct TWA_PACKED
{
unsigned char opcode:5;
unsigned char sgl_offset:3;
} byte0;
unsigned char size;
unsigned char request_id;
struct TWA_PACKED
{
unsigned char unit:4;
unsigned char host_id:4;
} byte3;
/* Second DWORD */
unsigned char status;
unsigned char flags;
union
{
unsigned short block_count;
unsigned short parameter_count;
unsigned short message_credits;
} byte6;
union
{
struct TWA_PACKED
{
uint32_t lba;
TW_SG_Entry sgl[TW_ESCALADE_MAX_SGL_LENGTH];
dma_addr_t padding;
} io;
struct
{
TW_SG_Entry sgl[TW_ESCALADE_MAX_SGL_LENGTH];
uint32_t padding;
dma_addr_t padding2;
} param;
} byte8_offset;
} TW_Command;
typedef struct TWA_PACKED TAG_TW_Command_Apache
{
unsigned char opcode__reserved;
unsigned char unit;
unsigned short request_id__lunl;
unsigned char status;
unsigned char sgl_offset;
unsigned short sgl_entries__lunh;
unsigned char cdb[16];
TW_SG_Entry sg_list[TW_APACHE_MAX_SGL_LENGTH];
unsigned char padding[TW_PADDING_LENGTH];
} TW_Command_Apache;
typedef struct TWA_PACKED TAG_TW_Command_Full
{
TW_Command_Apache_Header header;
union
{
TW_Command oldcommand;
TW_Command_Apache newcommand;
} command;
} TW_Command_Full;
typedef struct TWA_PACKED TAG_TW_Ioctl_Driver_Command
{
unsigned int control_code;
unsigned int status;
unsigned int unique_id;
unsigned int sequence_id;
unsigned int os_specific;
unsigned int buffer_length;
} TW_Ioctl_Driver_Command;
typedef struct TWA_PACKED TAG_TW_Ioctl_Apache
{
TW_Ioctl_Driver_Command driver_command;
char padding[488];
TW_Command_Full firmware_command;
char data_buffer[0];
} TW_Ioctl_Buf_Apache;
typedef struct TWA_PACKED
{
unsigned short table_id;
unsigned short parameter_id;
unsigned short parameter_size_bytes;
unsigned short actual_parameter_size_bytes;
unsigned char data[0];
} TW_Param_Apache, *PTW_Param_Apache;
typedef struct
{
uint8_t resv;
uint8_t tw_sec;
uint8_t tw_min;
uint8_t tw_hour;
uint8_t tw_day;
uint8_t tw_month;
uint16_t tw_year;
} TW_DateTime;
#define TW_IOCTL_FIRMWARE_PASS_THROUGH 0x108
#define TW_OP_GET_PARAM 0x12
#define TW_OP_SET_PARAM 0x13
#define TW_TIMEKEEP_TABLE 0x040A
#define TW_TIMEKEEP_DATETIME 0x4
#endif /* _TWA_H_ */
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