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/* $OpenBSD: if_aoe.h,v 1.2 2010/08/21 06:50:42 blambert Exp $ */
/*
* Copyright (c) 2007 Ted Unangst <tedu@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/workq.h>
#include <sys/timeout.h> /* for struct timeout */
struct aoe_packet {
#define AOE_F_ERROR (1 << 2)
#define AOE_F_RESP (1 << 3)
#if BYTE_ORDER == LITTLE_ENDIAN
unsigned char flags : 4;
unsigned char vers : 4;
#else
unsigned char vers : 4;
unsigned char flags : 4;
#endif
unsigned char error;
unsigned short major;
unsigned char minor;
unsigned char command;
unsigned int tag;
union {
/* command packet */
struct {
#define AOE_AF_WRITE (1 << 0)
#define AOE_AF_EXTENDED (1 << 6)
unsigned char aflags;
unsigned char feature;
unsigned char sectorcnt;
#define AOE_READ 0x20
#define AOE_READ_EXT 0x24
#define AOE_WRITE 0x30
#define AOE_WRITE_EXT 0x34
unsigned char cmd;
unsigned char lba0;
unsigned char lba1;
unsigned char lba2;
#define AOE_LBABIT 0x40
unsigned char lba3;
unsigned char lba4;
unsigned char lba5;
unsigned short reserved;
unsigned char data[];
} __packed;
/* config packet */
struct {
unsigned short buffercnt;
unsigned short firmwarevers;
unsigned char configsectorcnt;
#if BYTE_ORDER == LITTLE_ENDIAN
unsigned char ccmd : 4;
unsigned char serververs : 4;
#else
unsigned char serververs : 4;
unsigned char ccmd : 4;
#endif
unsigned short configstringlen;
unsigned char configstring[1024];
} __packed;
};
} __packed;
#define AOE_BLK2HDR(blk, ap) do { \
ap->lba0 = blk; \
ap->lba1 = blk >> 8; \
ap->lba2 = blk >> 16; \
} while (0)
#define AOE_HDR2BLK(ap, blk) do { \
blk = 0; \
blk |= ap->lba0; \
blk |= ap->lba1 << 8; \
blk |= ap->lba2 << 16; \
} while (0)
#define AOE_CFGHDRLEN 32
#define AOE_CMDHDRLEN 36
struct aoe_req {
void *v;
int tag;
int len;
TAILQ_ENTRY(aoe_req) next;
struct timeout to;
};
struct aoe_handler {
TAILQ_ENTRY(aoe_handler) next;
unsigned short major;
unsigned char minor;
struct ifnet *ifp;
workq_fn fn;
struct workq_task task;
TAILQ_HEAD(, aoe_req) reqs;
};
extern TAILQ_HEAD(aoe_handler_head, aoe_handler) aoe_handlers;
extern int aoe_waiting;
void aoe_input(struct ifnet *, struct mbuf *);
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