aboutsummaryrefslogtreecommitdiff
path: root/drivers/infiniband/hw/ipath/ips_common.h
blob: ab7cbbbfd03a04ae8dc9dc94341b02ff63f2ed90 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
#ifndef IPS_COMMON_H
#define IPS_COMMON_H
/*
 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "ipath_common.h"

struct ipath_header {
	/*
	 * Version - 4 bits, Port - 4 bits, TID - 10 bits and Offset -
	 * 14 bits before ECO change ~28 Dec 03.  After that, Vers 4,
	 * Port 3, TID 11, offset 14.
	 */
	__le32 ver_port_tid_offset;
	__le16 chksum;
	__le16 pkt_flags;
};

struct ips_message_header {
	__be16 lrh[4];
	__be32 bth[3];
	/* fields below this point are in host byte order */
	struct ipath_header iph;
	__u8 sub_opcode;
	__u8 flags;
	__u16 src_rank;
	/* 24 bits. The upper 8 bit is available for other use */
	union {
		struct {
			unsigned ack_seq_num:24;
			unsigned port:4;
			unsigned unused:4;
		};
		__u32 ack_seq_num_org;
	};
	__u8 expected_tid_session_id;
	__u8 tinylen;		/* to aid MPI */
	union {
	    __u16 tag;		/* to aid MPI */
	    __u16 mqhdr;	/* for PSM MQ */
	};
	union {
		__u32 mpi[4];	/* to aid MPI */
		__u32 data[4];
		__u64 mq[2];	/* for PSM MQ */
		struct {
			__u16 mtu;
			__u8 major_ver;
			__u8 minor_ver;
			__u32 not_used;	//free
			__u32 run_id;
			__u32 client_ver;
		};
	};
};

struct ether_header {
	__be16 lrh[4];
	__be32 bth[3];
	struct ipath_header iph;
	__u8 sub_opcode;
	__u8 cmd;
	__be16 lid;
	__u16 mac[3];
	__u8 frag_num;
	__u8 seq_num;
	__le32 len;
	/* MUST be of word size due to PIO write requirements */
	__le32 csum;
	__le16 csum_offset;
	__le16 flags;
	__u16 first_2_bytes;
	__u8 unused[2];		/* currently unused */
};

/*
 * The PIO buffer used for sending infinipath messages must only be written
 * in 32-bit words, all the data must be written, and no writes can occur
 * after the last word is written (which transfers "ownership" of the buffer
 * to the chip and triggers the message to be sent).
 * Since the Linux sk_buff structure can be recursive, non-aligned, and
 * any number of bytes in each segment, we use the following structure
 * to keep information about the overall state of the copy operation.
 * This is used to save the information needed to store the checksum
 * in the right place before sending the last word to the hardware and
 * to buffer the last 0-3 bytes of non-word sized segments.
 */
struct copy_data_s {
	struct ether_header *hdr;
	/* addr of PIO buf to write csum to */
	__u32 __iomem *csum_pio;
	__u32 __iomem *to;	/* addr of PIO buf to write data to */
	__u32 device;		/* which device to allocate PIO bufs from */
	__s32 error;		/* set if there is an error. */
	__s32 extra;		/* amount of data saved in u.buf below */
	__u32 len;		/* total length to send in bytes */
	__u32 flen;		/* frament length in words */
	__u32 csum;		/* partial IP checksum */
	__u32 pos;		/* position for partial checksum */
	__u32 offset;		/* offset to where data currently starts */
	__s32 checksum_calc;	/* set to 1 when csum has been calculated */
	struct sk_buff *skb;
	union {
		__u32 w;
		__u8 buf[4];
	} u;
};

/* IB - LRH header consts */
#define IPS_LRH_GRH 0x0003	/* 1. word of IB LRH - next header: GRH */
#define IPS_LRH_BTH 0x0002	/* 1. word of IB LRH - next header: BTH */

#define IPS_OFFSET  0

/*
 * defines the cut-off point between the header queue and eager/expected
 * TID queue
 */
#define NUM_OF_EXTRA_WORDS_IN_HEADER_QUEUE \
	((sizeof(struct ips_message_header) - \
	  offsetof(struct ips_message_header, iph)) >> 2)

/* OpCodes  */
#define OPCODE_IPS 0xC0
#define OPCODE_ITH4X 0xC1

/* OpCode 30 is use by stand-alone test programs  */
#define OPCODE_RAW_DATA 0xDE
/* last OpCode (31) is reserved for test  */
#define OPCODE_TEST 0xDF

/* sub OpCodes - ips  */
#define OPCODE_SEQ_DATA 0x01
#define OPCODE_SEQ_CTRL 0x02

#define OPCODE_SEQ_MQ_DATA 0x03
#define OPCODE_SEQ_MQ_CTRL 0x04

#define OPCODE_ACK 0x10
#define OPCODE_NAK 0x11

#define OPCODE_ERR_CHK 0x20
#define OPCODE_ERR_CHK_PLS 0x21

#define OPCODE_STARTUP 0x30
#define OPCODE_STARTUP_ACK 0x31
#define OPCODE_STARTUP_NAK 0x32

#define OPCODE_STARTUP_EXT 0x34
#define OPCODE_STARTUP_ACK_EXT 0x35
#define OPCODE_STARTUP_NAK_EXT 0x36

#define OPCODE_TIDS_RELEASE 0x40
#define OPCODE_TIDS_RELEASE_CONFIRM 0x41

#define OPCODE_CLOSE 0x50
#define OPCODE_CLOSE_ACK 0x51
/*
 * like OPCODE_CLOSE, but no complaint if other side has already closed.
 * Used when doing abort(), MPI_Abort(), etc.
 */
#define OPCODE_ABORT 0x52

/* sub OpCodes - ith4x  */
#define OPCODE_ENCAP 0x81
#define OPCODE_LID_ARP 0x82

/* Receive Header Queue: receive type (from infinipath) */
#define RCVHQ_RCV_TYPE_EXPECTED  0
#define RCVHQ_RCV_TYPE_EAGER     1
#define RCVHQ_RCV_TYPE_NON_KD    2
#define RCVHQ_RCV_TYPE_ERROR     3

/* misc. */
#define SIZE_OF_CRC 1

#define EAGER_TID_ID INFINIPATH_I_TID_MASK

#define IPS_DEFAULT_P_KEY 0xFFFF

#define IPS_PERMISSIVE_LID 0xFFFF
#define IPS_MULTICAST_LID_BASE 0xC000

#define IPS_AETH_CREDIT_SHIFT 24
#define IPS_AETH_CREDIT_MASK 0x1F
#define IPS_AETH_CREDIT_INVAL 0x1F

#define IPS_PSN_MASK 0xFFFFFF
#define IPS_MSN_MASK 0xFFFFFF
#define IPS_QPN_MASK 0xFFFFFF
#define IPS_MULTICAST_QPN 0xFFFFFF

/* functions for extracting fields from rcvhdrq entries */
static inline __u32 ips_get_hdr_err_flags(const __le32 * rbuf)
{
	return __le32_to_cpu(rbuf[1]);
}

static inline __u32 ips_get_index(const __le32 * rbuf)
{
	return (__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_EGRINDEX_SHIFT)
	    & INFINIPATH_RHF_EGRINDEX_MASK;
}

static inline __u32 ips_get_rcv_type(const __le32 * rbuf)
{
	return (__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_RCVTYPE_SHIFT)
	    & INFINIPATH_RHF_RCVTYPE_MASK;
}

static inline __u32 ips_get_length_in_bytes(const __le32 * rbuf)
{
	return ((__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_LENGTH_SHIFT)
		& INFINIPATH_RHF_LENGTH_MASK) << 2;
}

static inline void *ips_get_first_protocol_header(const __u32 * rbuf)
{
	return (void *)&rbuf[2];
}

static inline struct ips_message_header *ips_get_ips_header(const __u32 *
							    rbuf)
{
	return (struct ips_message_header *)&rbuf[2];
}

static inline __u32 ips_get_ipath_ver(__le32 hdrword)
{
	return (__le32_to_cpu(hdrword) >> INFINIPATH_I_VERS_SHIFT)
	    & INFINIPATH_I_VERS_MASK;
}

#endif				/* IPS_COMMON_H */