drivers/s390/net/qeth_eddp.h

   1 /*
   2  * linux/drivers/s390/net/qeth_eddp.c ($Revision: 1.5 $)
   3  *
   4  * Header file for qeth enhanced device driver pakcing.
   5  *
   6  * Copyright 2004 IBM Corporation
   7  *
   8  *    Author(s): Thomas Spatzier <tspat@de.ibm.com>
   9  *
  10  *    $Revision: 1.5 $   $Date: 2005/03/24 09:04:18 $
  11  *
  12  */
  13 #ifndef __QETH_EDDP_H__
  14 #define __QETH_EDDP_H__
  15
  16 struct qeth_eddp_element {
  17         u32 flags;
  18         u32 length;
  19         void *addr;
  20 };
  21
  22 struct qeth_eddp_context {
  23         atomic_t refcnt;
  24         enum qeth_large_send_types type;
  25         int num_pages;                      /* # of allocated pages */
  26         u8 **pages;                         /* pointers to pages */
  27         int offset;                         /* offset in ctx during creation */
  28         int num_elements;                   /* # of required 'SBALEs' */
  29         struct qeth_eddp_element *elements; /* array of 'SBALEs' */
  30         int elements_per_skb;               /* # of 'SBALEs' per skb **/
  31 };
  32
  33 struct qeth_eddp_context_reference {
  34         struct list_head list;
  35         struct qeth_eddp_context *ctx;
  36 };
  37
  38 extern struct qeth_eddp_context *
  39 qeth_eddp_create_context(struct qeth_card *,struct sk_buff *,struct qeth_hdr *);
  40
  41 extern void
  42 qeth_eddp_put_context(struct qeth_eddp_context *);
  43
  44 extern int
  45 qeth_eddp_fill_buffer(struct qeth_qdio_out_q *,struct qeth_eddp_context *,int);
  46
  47 extern void
  48 qeth_eddp_buf_release_contexts(struct qeth_qdio_out_buffer *);
  49
  50 extern int
  51 qeth_eddp_check_buffers_for_context(struct qeth_qdio_out_q *,
  52                                     struct qeth_eddp_context *);
  53 /*
  54  * Data used for fragmenting a IP packet.
  55  */
  56 struct qeth_eddp_data {
  57         struct qeth_hdr qh;
  58         struct ethhdr mac;
  59         u16 vlan[2];
  60         union {
  61                 struct {
  62                         struct iphdr h;
  63                         u8 options[40];
  64                 } ip4;
  65                 struct {
  66                         struct ipv6hdr h;
  67                 } ip6;
  68         } nh;
  69         u8 nhl;
  70         void *nh_in_ctx;        /* address of nh within the ctx */
  71         union {
  72                 struct {
  73                         struct tcphdr h;
  74                         u8 options[40];
  75                 } tcp;
  76         } th;
  77         u8 thl;
  78         void *th_in_ctx;        /* address of th within the ctx */
  79         struct sk_buff *skb;
  80         int skb_offset;
  81         int frag;
  82         int frag_offset;
  83 } __attribute__ ((packed));
  84
  85 #endif /* __QETH_EDDP_H__ */