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#ifndef _GPXE_AOE_H
#define _GPXE_AOE_H
/** @file
*
* AoE protocol
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <gpxe/list.h>
#include <gpxe/if_ether.h>
#include <gpxe/retry.h>
#include <gpxe/ata.h>
/** An AoE config command */
struct aoecfg {
/** AoE Queue depth */
uint16_t bufcnt;
/** ATA target firmware version */
uint16_t fwver;
/** ATA target sector count */
uint8_t scnt;
/** AoE config string subcommand */
uint8_t aoeccmd;
/** AoE config string length */
uint16_t cfglen;
/** AoE config string */
uint8_t data[0];
} __attribute__ (( packed ));
/** An AoE ATA command */
struct aoeata {
/** AoE command flags */
uint8_t aflags;
/** ATA error/feature register */
uint8_t err_feat;
/** ATA sector count register */
uint8_t count;
/** ATA command/status register */
uint8_t cmd_stat;
/** Logical block address, in little-endian order */
union {
uint64_t u64;
uint8_t bytes[6];
} lba;
/** Data payload */
uint8_t data[0];
} __attribute__ (( packed ));
#define AOE_FL_EXTENDED 0x40 /**< LBA48 extended addressing */
#define AOE_FL_DEV_HEAD 0x10 /**< Device/head flag */
#define AOE_FL_ASYNC 0x02 /**< Asynchronous write */
#define AOE_FL_WRITE 0x01 /**< Write command */
/** An AoE command */
union aoecmd {
/** Config command */
struct aoecfg cfg;
/** ATA command */
struct aoeata ata;
};
/** An AoE header */
struct aoehdr {
/** Protocol version number and flags */
uint8_t ver_flags;
/** Error code */
uint8_t error;
/** Major device number, in network byte order */
uint16_t major;
/** Minor device number */
uint8_t minor;
/** Command number */
uint8_t command;
/** Tag, in network byte order */
uint32_t tag;
/** Payload */
union aoecmd cmd[0];
} __attribute__ (( packed ));
#define AOE_VERSION 0x10 /**< Version 1 */
#define AOE_VERSION_MASK 0xf0 /**< Version part of ver_flags field */
#define AOE_FL_RESPONSE 0x08 /**< Message is a response */
#define AOE_FL_ERROR 0x04 /**< Command generated an error */
#define AOE_MAJOR_BROADCAST 0xffff
#define AOE_MINOR_BROADCAST 0xff
#define AOE_CMD_ATA 0x00 /**< Issue ATA command */
#define AOE_CMD_CONFIG 0x01 /**< Query Config Information */
#define AOE_TAG_MAGIC 0xebeb0000
#define AOE_ERR_BAD_COMMAND 1 /**< Unrecognised command code */
#define AOE_ERR_BAD_PARAMETER 2 /**< Bad argument parameter */
#define AOE_ERR_UNAVAILABLE 3 /**< Device unavailable */
#define AOE_ERR_CONFIG_EXISTS 4 /**< Config string present */
#define AOE_ERR_BAD_VERSION 5 /**< Unsupported version */
/** An AoE session */
struct aoe_session {
/** Reference counter */
struct refcnt refcnt;
/** List of all AoE sessions */
struct list_head list;
/** Network device */
struct net_device *netdev;
/** Major number */
uint16_t major;
/** Minor number */
uint8_t minor;
/** Target MAC address */
uint8_t target[ETH_ALEN];
/** Tag for current AoE command */
uint32_t tag;
/** Current AOE command */
uint8_t aoe_cmd_type;
/** Current ATA command */
struct ata_command *command;
/** Overall status of current ATA command */
unsigned int status;
/** Byte offset within command's data buffer */
unsigned int command_offset;
/** Return status code for command */
int rc;
/** Retransmission timer */
struct retry_timer timer;
};
#define AOE_STATUS_ERR_MASK 0x0f /**< Error portion of status code */
#define AOE_STATUS_PENDING 0x80 /**< Command pending */
/** Maximum number of sectors per packet */
#define AOE_MAX_COUNT 2
extern void aoe_detach ( struct ata_device *ata );
extern int aoe_attach ( struct ata_device *ata, struct net_device *netdev,
const char *root_path );
#endif /* _GPXE_AOE_H */
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