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/*
* linux/drivers/s390/net/qeth_eddp.h
*
* Header file for qeth enhanced device driver packing.
*
* Copyright 2004 IBM Corporation
*
* Author(s): Thomas Spatzier <tspat@de.ibm.com>
*
*/
#ifndef __QETH_EDDP_H__
#define __QETH_EDDP_H__
struct qeth_eddp_element {
u32 flags;
u32 length;
void *addr;
};
struct qeth_eddp_context {
atomic_t refcnt;
enum qeth_large_send_types type;
int num_pages; /* # of allocated pages */
u8 **pages; /* pointers to pages */
int offset; /* offset in ctx during creation */
int num_elements; /* # of required 'SBALEs' */
struct qeth_eddp_element *elements; /* array of 'SBALEs' */
int elements_per_skb; /* # of 'SBALEs' per skb **/
};
struct qeth_eddp_context_reference {
struct list_head list;
struct qeth_eddp_context *ctx;
};
extern struct qeth_eddp_context *
qeth_eddp_create_context(struct qeth_card *,struct sk_buff *,
struct qeth_hdr *, unsigned char);
extern void
qeth_eddp_put_context(struct qeth_eddp_context *);
extern int
qeth_eddp_fill_buffer(struct qeth_qdio_out_q *,struct qeth_eddp_context *,int);
extern void
qeth_eddp_buf_release_contexts(struct qeth_qdio_out_buffer *);
extern int
qeth_eddp_check_buffers_for_context(struct qeth_qdio_out_q *,
struct qeth_eddp_context *);
/*
* Data used for fragmenting a IP packet.
*/
struct qeth_eddp_data {
struct qeth_hdr qh;
struct ethhdr mac;
__be16 vlan[2];
union {
struct {
struct iphdr h;
u8 options[40];
} ip4;
struct {
struct ipv6hdr h;
} ip6;
} nh;
u8 nhl;
void *nh_in_ctx; /* address of nh within the ctx */
union {
struct {
struct tcphdr h;
u8 options[40];
} tcp;
} th;
u8 thl;
void *th_in_ctx; /* address of th within the ctx */
struct sk_buff *skb;
int skb_offset;
int frag;
int frag_offset;
} __attribute__ ((packed));
#endif /* __QETH_EDDP_H__ */
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