drivers/infiniband/hw/ipath/ipath_layer.h

   1 /*
   2  * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #ifndef _IPATH_LAYER_H
  34 #define _IPATH_LAYER_H
  35
  36 /*
  37  * This header file is for symbols shared between the infinipath driver
  38  * and drivers layered upon it (such as ipath).
  39  */
  40
  41 struct sk_buff;
  42 struct ipath_sge_state;
  43 struct ipath_devdata;
  44 struct ether_header;
  45
  46 struct ipath_layer_counters {
  47         u64 symbol_error_counter;
  48         u64 link_error_recovery_counter;
  49         u64 link_downed_counter;
  50         u64 port_rcv_errors;
  51         u64 port_rcv_remphys_errors;
  52         u64 port_xmit_discards;
  53         u64 port_xmit_data;
  54         u64 port_rcv_data;
  55         u64 port_xmit_packets;
  56         u64 port_rcv_packets;
  57 };
  58
  59 /*
  60  * A segment is a linear region of low physical memory.
  61  * XXX Maybe we should use phys addr here and kmap()/kunmap().
  62  * Used by the verbs layer.
  63  */
  64 struct ipath_seg {
  65         void *vaddr;
  66         size_t length;
  67 };
  68
  69 /* The number of ipath_segs that fit in a page. */
  70 #define IPATH_SEGSZ     (PAGE_SIZE / sizeof (struct ipath_seg))
  71
  72 struct ipath_segarray {
  73         struct ipath_seg segs[IPATH_SEGSZ];
  74 };
  75
  76 struct ipath_mregion {
  77         u64 user_base;          /* User's address for this region */
  78         u64 iova;               /* IB start address of this region */
  79         size_t length;
  80         u32 lkey;
  81         u32 offset;             /* offset (bytes) to start of region */
  82         int access_flags;
  83         u32 max_segs;           /* number of ipath_segs in all the arrays */
  84         u32 mapsz;              /* size of the map array */
  85         struct ipath_segarray *map[0];  /* the segments */
  86 };
  87
  88 /*
  89  * These keep track of the copy progress within a memory region.
  90  * Used by the verbs layer.
  91  */
  92 struct ipath_sge {
  93         struct ipath_mregion *mr;
  94         void *vaddr;            /* current pointer into the segment */
  95         u32 sge_length;         /* length of the SGE */
  96         u32 length;             /* remaining length of the segment */
  97         u16 m;                  /* current index: mr->map[m] */
  98         u16 n;                  /* current index: mr->map[m]->segs[n] */
  99 };
 100
 101 struct ipath_sge_state {
 102         struct ipath_sge *sg_list;      /* next SGE to be used if any */
 103         struct ipath_sge sge;   /* progress state for the current SGE */
 104         u8 num_sge;
 105 };
 106
 107 int ipath_layer_register(void *(*l_add)(int, struct ipath_devdata *),
 108                          void (*l_remove)(void *),
 109                          int (*l_intr)(void *, u32),
 110                          int (*l_rcv)(void *, void *,
 111                                       struct sk_buff *),
 112                          u16 rcv_opcode,
 113                          int (*l_rcv_lid)(void *, void *));
 114 int ipath_verbs_register(void *(*l_add)(int, struct ipath_devdata *),
 115                          void (*l_remove)(void *arg),
 116                          int (*l_piobufavail)(void *arg),
 117                          void (*l_rcv)(void *arg, void *rhdr,
 118                                        void *data, u32 tlen),
 119                          void (*l_timer_cb)(void *arg));
 120 void ipath_layer_unregister(void);
 121 void ipath_verbs_unregister(void);
 122 int ipath_layer_open(struct ipath_devdata *, u32 * pktmax);
 123 u16 ipath_layer_get_lid(struct ipath_devdata *dd);
 124 int ipath_layer_get_mac(struct ipath_devdata *dd, u8 *);
 125 u16 ipath_layer_get_bcast(struct ipath_devdata *dd);
 126 u32 ipath_layer_get_cr_errpkey(struct ipath_devdata *dd);
 127 int ipath_layer_set_linkstate(struct ipath_devdata *dd, u8 state);
 128 int ipath_layer_set_mtu(struct ipath_devdata *, u16);
 129 int ipath_set_sps_lid(struct ipath_devdata *, u32, u8);
 130 int ipath_layer_send_hdr(struct ipath_devdata *dd,
 131                          struct ether_header *hdr);
 132 int ipath_verbs_send(struct ipath_devdata *dd, u32 hdrwords,
 133                      u32 * hdr, u32 len, struct ipath_sge_state *ss);
 134 int ipath_layer_set_piointbufavail_int(struct ipath_devdata *dd);
 135 int ipath_layer_get_boardname(struct ipath_devdata *dd, char *name,
 136                               size_t namelen);
 137 int ipath_layer_snapshot_counters(struct ipath_devdata *dd, u64 *swords,
 138                                   u64 *rwords, u64 *spkts, u64 *rpkts,
 139                                   u64 *xmit_wait);
 140 int ipath_layer_get_counters(struct ipath_devdata *dd,
 141                              struct ipath_layer_counters *cntrs);
 142 int ipath_layer_want_buffer(struct ipath_devdata *dd);
 143 int ipath_layer_set_guid(struct ipath_devdata *, __be64 guid);
 144 __be64 ipath_layer_get_guid(struct ipath_devdata *);
 145 u32 ipath_layer_get_nguid(struct ipath_devdata *);
 146 int ipath_layer_query_device(struct ipath_devdata *, u32 * vendor,
 147                              u32 * boardrev, u32 * majrev, u32 * minrev);
 148 u32 ipath_layer_get_flags(struct ipath_devdata *dd);
 149 struct device *ipath_layer_get_device(struct ipath_devdata *dd);
 150 u16 ipath_layer_get_deviceid(struct ipath_devdata *dd);
 151 u64 ipath_layer_get_lastibcstat(struct ipath_devdata *dd);
 152 u32 ipath_layer_get_ibmtu(struct ipath_devdata *dd);
 153 int ipath_layer_enable_timer(struct ipath_devdata *dd);
 154 int ipath_layer_disable_timer(struct ipath_devdata *dd);
 155 int ipath_layer_set_verbs_flags(struct ipath_devdata *dd, unsigned flags);
 156 unsigned ipath_layer_get_npkeys(struct ipath_devdata *dd);
 157 unsigned ipath_layer_get_pkey(struct ipath_devdata *dd, unsigned index);
 158 int ipath_layer_get_pkeys(struct ipath_devdata *dd, u16 *pkeys);
 159 int ipath_layer_set_pkeys(struct ipath_devdata *dd, u16 *pkeys);
 160 int ipath_layer_get_linkdowndefaultstate(struct ipath_devdata *dd);
 161 int ipath_layer_set_linkdowndefaultstate(struct ipath_devdata *dd,
 162                                          int sleep);
 163 int ipath_layer_get_phyerrthreshold(struct ipath_devdata *dd);
 164 int ipath_layer_set_phyerrthreshold(struct ipath_devdata *dd, unsigned n);
 165 int ipath_layer_get_overrunthreshold(struct ipath_devdata *dd);
 166 int ipath_layer_set_overrunthreshold(struct ipath_devdata *dd, unsigned n);
 167 u32 ipath_layer_get_rcvhdrentsize(struct ipath_devdata *dd);
 168
 169 /* ipath_ether interrupt values */
 170 #define IPATH_LAYER_INT_IF_UP 0x2
 171 #define IPATH_LAYER_INT_IF_DOWN 0x4
 172 #define IPATH_LAYER_INT_LID 0x8
 173 #define IPATH_LAYER_INT_SEND_CONTINUE 0x10
 174 #define IPATH_LAYER_INT_BCAST 0x40
 175
 176 /* _verbs_layer.l_flags */
 177 #define IPATH_VERBS_KERNEL_SMA 0x1
 178
 179 extern unsigned ipath_debug; /* debugging bit mask */
 180
 181 #endif                          /* _IPATH_LAYER_H */