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t/_I|+ /* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright(c) 2007 Intel Corporation. All rights reserved.
*
* Maintained at www.Open-FCoE.org
*/
#ifndef _FC_FRAME_H_
#define _FC_FRAME_H_
#include
#include
#include
#include
#include
#include
#include
/* some helpful macros */
#define ntohll(x) be64_to_cpu(x)
#define htonll(x) cpu_to_be64(x)
static inline u32 ntoh24(const u8 *p)
{
return (p[0] << 16) | (p[1] << 8) | p[2];
}
static inline void hton24(u8 *p, u32 v)
{
p[0] = (v >> 16) & 0xff;
p[1] = (v >> 8) & 0xff;
p[2] = v & 0xff;
}
/*
* The fc_frame interface is used to pass frame data between functions.
* The frame includes the data buffer, length, and SOF / EOF delimiter types.
* A pointer to the port structure of the receiving port is also includeded.
*/
#define FC_FRAME_HEADROOM 32 /* headroom for VLAN + FCoE headers */
#define FC_FRAME_TAILROOM 8 /* trailer space for FCoE */
/* Max number of skb frags allowed, reserving one for fcoe_crc_eof page */
#define FC_FRAME_SG_LEN (MAX_SKB_FRAGS - 1)
#define fp_skb(fp) (&((fp)->skb))
#define fr_hdr(fp) ((fp)->skb.data)
#define fr_len(fp) ((fp)->skb.len)
#define fr_cb(fp) ((struct fcoe_rcv_info *)&((fp)->skb.cb[0]))
#define fr_dev(fp) (fr_cb(fp)->fr_dev)
#define fr_seq(fp) (fr_cb(fp)->fr_seq)
#define fr_sof(fp) (fr_cb(fp)->fr_sof)
#define fr_eof(fp) (fr_cb(fp)->fr_eof)
#define fr_flags(fp) (fr_cb(fp)->fr_flags)
#define fr_encaps(fp) (fr_cb(fp)->fr_encaps)
#define fr_max_payload(fp) (fr_cb(fp)->fr_max_payload)
#define fr_fsp(fp) (fr_cb(fp)->fr_fsp)
#define fr_crc(fp) (fr_cb(fp)->fr_crc)
struct fc_frame {
struct sk_buff skb;
};
struct fcoe_rcv_info {
struct fc_lport *fr_dev; /* transport layer private pointer */
struct fc_seq *fr_seq; /* for use with exchange manager */
struct fc_fcp_pkt *fr_fsp; /* for the corresponding fcp I/O */
u32 fr_crc;
u16 fr_max_payload; /* max FC payload */
u8 fr_sof; /* start of frame delimiter */
u8 fr_eof; /* end of frame delimiter */
u8 fr_flags; /* flags - see below */
u8 fr_encaps; /* LLD encapsulation info (e.g. FIP) */
u8 granted_mac[ETH_ALEN]; /* FCoE MAC address */
};
/*
* Get fc_frame pointer for an skb that's already been imported.
*/
static inline struct fcoe_rcv_info *fcoe_dev_from_skb(const struct sk_buff *skb)
{
BUILD_BUG_ON(sizeof(struct fcoe_rcv_info) > sizeof(skb->cb));
return (struct fcoe_rcv_info *) skb->cb;
}
/*
* fr_flags.
*/
#define FCPHF_CRC_UNCHECKED 0x01 /* CRC not computed, still appended */
/*
* Initialize a frame.
* We don't do a complete memset here for performance reasons.
* The caller must set fr_free, fr_hdr, fr_len, fr_sof, and fr_eof eventually.
*/
static inline void fc_frame_init(struct fc_frame *fp)
{
fr_dev(fp) = NULL;
fr_seq(fp) = NULL;
fr_flags(fp) = 0;
fr_encaps(fp) = 0;
}
struct fc_frame *fc_frame_alloc_fill(struct fc_lport *, size_t payload_len);
struct fc_f