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