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   1 /*
   2  * linux/drivers/s390/net/qeth_eddp.h
   3  *
   4  * Header file for qeth enhanced device driver packing.
   5  *
   6  * Copyright 2004 IBM Corporation
   7  *
   8  *    Author(s): Thomas Spatzier <tspat@de.ibm.com>
   9  *
  10  */
  11 #ifndef __QETH_EDDP_H__
  12 #define __QETH_EDDP_H__
  13
  14 struct qeth_eddp_element {
  15         u32 flags;
  16         u32 length;
  17         void *addr;
  18 };
  19
  20 struct qeth_eddp_context {
  21         atomic_t refcnt;
  22         enum qeth_large_send_types type;
  23         int num_pages;                      /* # of allocated pages */
  24         u8 **pages;                         /* pointers to pages */
  25         int offset;                         /* offset in ctx during creation */
  26         int num_elements;                   /* # of required 'SBALEs' */
  27         struct qeth_eddp_element *elements; /* array of 'SBALEs' */
  28         int elements_per_skb;               /* # of 'SBALEs' per skb **/
  29 };
  30
  31 struct qeth_eddp_context_reference {
  32         struct list_head list;
  33         struct qeth_eddp_context *ctx;
  34 };
  35
  36 extern struct qeth_eddp_context *
  37 qeth_eddp_create_context(struct qeth_card *,struct sk_buff *,
  38                          struct qeth_hdr *, unsigned char);
  39
  40 extern void
  41 qeth_eddp_put_context(struct qeth_eddp_context *);
  42
  43 extern int
  44 qeth_eddp_fill_buffer(struct qeth_qdio_out_q *,struct qeth_eddp_context *,int);
  45
  46 extern void
  47 qeth_eddp_buf_release_contexts(struct qeth_qdio_out_buffer *);
  48
  49 extern int
  50 qeth_eddp_check_buffers_for_context(struct qeth_qdio_out_q *,
  51                                     struct qeth_eddp_context *);
  52 /*
  53  * Data used for fragmenting a IP packet.
  54  */
  55 struct qeth_eddp_data {
  56         struct qeth_hdr qh;
  57         struct ethhdr mac;
  58         __be16 vlan[2];
  59         union {
  60                 struct {
  61                         struct iphdr h;
  62                         u8 options[40];
  63                 } ip4;
  64                 struct {
  65                         struct ipv6hdr h;
  66                 } ip6;
  67         } nh;
  68         u8 nhl;
  69         void *nh_in_ctx;        /* address of nh within the ctx */
  70         union {
  71                 struct {
  72                         struct tcphdr h;
  73                         u8 options[40];
  74                 } tcp;
  75         } th;
  76         u8 thl;
  77         void *th_in_ctx;        /* address of th within the ctx */
  78         struct sk_buff *skb;
  79         int skb_offset;
  80         int frag;
  81         int frag_offset;
  82 } __attribute__ ((packed));
  83
  84 #endif /* __QETH_EDDP_H__ */