4e20d73bb5
will enable us to cascade async operations, which is necessary in order to properly support DNS. (For example, an HTTP request may have to redirect to a new location and will have to perform a new DNS lookup, so we can't just rely on doing the name lookup at the time of parsing the initial URL). Anything other than HTTP is probably broken right now; I'll fix the others up asap.
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
#ifndef _GPXE_AOE_H
|
|
#define _GPXE_AOE_H
|
|
|
|
/** @file
|
|
*
|
|
* AoE protocol
|
|
*
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <gpxe/list.h>
|
|
#include <gpxe/if_ether.h>
|
|
#include <gpxe/retry.h>
|
|
#include <gpxe/async.h>
|
|
#include <gpxe/ata.h>
|
|
#include <gpxe/hotplug.h>
|
|
|
|
/** An AoE ATA command */
|
|
struct aoecmd {
|
|
/** 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 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 {
|
|
/** ATA command */
|
|
struct aoecmd command[0];
|
|
} arg;
|
|
} __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 {
|
|
/** List of all AoE sessions */
|
|
struct list_head list;
|
|
|
|
/** Network device */
|
|
struct net_device *netdev;
|
|
/** Reference to network device */
|
|
struct reference netdev_ref;
|
|
|
|
/** 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 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;
|
|
/** Asynchronous operation for this command */
|
|
struct async async;
|
|
|
|
/** 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_open ( struct aoe_session *aoe );
|
|
extern void aoe_close ( struct aoe_session *aoe );
|
|
extern int aoe_issue ( struct aoe_session *aoe,
|
|
struct ata_command *command,
|
|
struct async *parent );
|
|
|
|
/** An AoE device */
|
|
struct aoe_device {
|
|
/** ATA device interface */
|
|
struct ata_device ata;
|
|
/** AoE protocol instance */
|
|
struct aoe_session aoe;
|
|
};
|
|
|
|
extern int init_aoedev ( struct aoe_device *aoedev );
|
|
|
|
#endif /* _GPXE_AOE_H */
|