1 /*
2 * Copyright(c) 2015 - 2018 Intel Corporation.
3 *
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
6 *
7 * GPL LICENSE SUMMARY
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * BSD LICENSE
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 *
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
29 * distribution.
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 *
46 */
47
48 #ifndef _COMMON_H
49 #define _COMMON_H
50
51 #include <rdma/hfi/hfi1_user.h>
52
53 /*
54 * This file contains defines, structures, etc. that are used
55 * to communicate between kernel and user code.
56 */
57
58 /* version of protocol header (known to chip also). In the long run,
59 * we should be able to generate and accept a range of version numbers;
60 * for now we only accept one, and it's compiled in.
61 */
62 #define IPS_PROTO_VERSION 2
63
64 /*
65 * These are compile time constants that you may want to enable or disable
66 * if you are trying to debug problems with code or performance.
67 * HFI1_VERBOSE_TRACING define as 1 if you want additional tracing in
68 * fast path code
69 * HFI1_TRACE_REGWRITES define as 1 if you want register writes to be
70 * traced in fast path code
71 * _HFI1_TRACING define as 0 if you want to remove all tracing in a
72 * compilation unit
73 */
74
75 /*
76 * If a packet's QP[23:16] bits match this value, then it is
77 * a PSM packet and the hardware will expect a KDETH header
78 * following the BTH.
79 */
80 #define DEFAULT_KDETH_QP 0x80
81
82 /* driver/hw feature set bitmask */
83 #define HFI1_CAP_USER_SHIFT 24
84 #define HFI1_CAP_MASK ((1UL << HFI1_CAP_USER_SHIFT) - 1)
85 /* locked flag - if set, only HFI1_CAP_WRITABLE_MASK bits can be set */
86 #define HFI1_CAP_LOCKED_SHIFT 63
87 #define HFI1_CAP_LOCKED_MASK 0x1ULL
88 #define HFI1_CAP_LOCKED_SMASK (HFI1_CAP_LOCKED_MASK << HFI1_CAP_LOCKED_SHIFT)
89 /* extra bits used between kernel and user processes */
90 #define HFI1_CAP_MISC_SHIFT (HFI1_CAP_USER_SHIFT * 2)
91 #define HFI1_CAP_MISC_MASK ((1ULL << (HFI1_CAP_LOCKED_SHIFT - \
92 HFI1_CAP_MISC_SHIFT)) - 1)
93
94 #define HFI1_CAP_KSET(cap) ({ hfi1_cap_mask |= HFI1_CAP_##cap; hfi1_cap_mask; })
95 #define HFI1_CAP_KCLEAR(cap) \
96 ({ \
97 hfi1_cap_mask &= ~HFI1_CAP_##cap; \
98 hfi1_cap_mask; \
99 })
100 #define HFI1_CAP_USET(cap) \
101 ({ \
102 hfi1_cap_mask |= (HFI1_CAP_##cap << HFI1_CAP_USER_SHIFT); \
103 hfi1_cap_mask; \
104 })
105 #define HFI1_CAP_UCLEAR(cap) \
106 ({ \
107 hfi1_cap_mask &= ~(HFI1_CAP_##cap << HFI1_CAP_USER_SHIFT); \
108 hfi1_cap_mask; \
109 })
110 #define HFI1_CAP_SET(cap) \
111 ({ \
112 hfi1_cap_mask |= (HFI1_CAP_##cap | (HFI1_CAP_##cap << \
113 HFI1_CAP_USER_SHIFT)); \
114 hfi1_cap_mask; \
115 })
116 #define HFI1_CAP_CLEAR(cap) \
117 ({ \
118 hfi1_cap_mask &= ~(HFI1_CAP_##cap | \
119 (HFI1_CAP_##cap << HFI1_CAP_USER_SHIFT)); \
120 hfi1_cap_mask; \
121 })
122 #define HFI1_CAP_LOCK() \
123 ({ hfi1_cap_mask |= HFI1_CAP_LOCKED_SMASK; hfi1_cap_mask; })
124 #define HFI1_CAP_LOCKED() (!!(hfi1_cap_mask & HFI1_CAP_LOCKED_SMASK))
125 /*
126 * The set of capability bits that can be changed after initial load
127 * This set is the same for kernel and user contexts. However, for
128 * user contexts, the set can be further filtered by using the
129 * HFI1_CAP_RESERVED_MASK bits.
130 */
131 #define HFI1_CAP_WRITABLE_MASK (HFI1_CAP_SDMA_AHG | \
132 HFI1_CAP_HDRSUPP | \
133 HFI1_CAP_MULTI_PKT_EGR | \
134 HFI1_CAP_NODROP_RHQ_FULL | \
135 HFI1_CAP_NODROP_EGR_FULL | \
136 HFI1_CAP_ALLOW_PERM_JKEY | \
137 HFI1_CAP_STATIC_RATE_CTRL | \
138 HFI1_CAP_PRINT_UNIMPL | \
139 HFI1_CAP_TID_UNMAP | \
140 HFI1_CAP_OPFN)
141 /*
142 * A set of capability bits that are "global" and are not allowed to be
143 * set in the user bitmask.
144 */
145 #define HFI1_CAP_RESERVED_MASK ((HFI1_CAP_SDMA | \
146 HFI1_CAP_USE_SDMA_HEAD | \
147 HFI1_CAP_EXTENDED_PSN | \
148 HFI1_CAP_PRINT_UNIMPL | \
149 HFI1_CAP_NO_INTEGRITY | \
150 HFI1_CAP_PKEY_CHECK | \
151 HFI1_CAP_TID_RDMA | \
152 HFI1_CAP_OPFN) << \
153 HFI1_CAP_USER_SHIFT)
154 /*
155 * Set of capabilities that need to be enabled for kernel context in
156 * order to be allowed for user contexts, as well.
157 */
158 #define HFI1_CAP_MUST_HAVE_KERN (HFI1_CAP_STATIC_RATE_CTRL)
159 /* Default enabled capabilities (both kernel and user) */
160 #define HFI1_CAP_MASK_DEFAULT (HFI1_CAP_HDRSUPP | \
161 HFI1_CAP_NODROP_RHQ_FULL | \
162 HFI1_CAP_NODROP_EGR_FULL | \
163 HFI1_CAP_SDMA | \
164 HFI1_CAP_PRINT_UNIMPL | \
165 HFI1_CAP_STATIC_RATE_CTRL | \
166 HFI1_CAP_PKEY_CHECK | \
167 HFI1_CAP_MULTI_PKT_EGR | \
168 HFI1_CAP_EXTENDED_PSN | \
169 ((HFI1_CAP_HDRSUPP | \
170 HFI1_CAP_MULTI_PKT_EGR | \
171 HFI1_CAP_STATIC_RATE_CTRL | \
172 HFI1_CAP_PKEY_CHECK | \
173 HFI1_CAP_EARLY_CREDIT_RETURN) << \
174 HFI1_CAP_USER_SHIFT))
175 /*
176 * A bitmask of kernel/global capabilities that should be communicated
177 * to user level processes.
178 */
179 #define HFI1_CAP_K2U (HFI1_CAP_SDMA | \
180 HFI1_CAP_EXTENDED_PSN | \
181 HFI1_CAP_PKEY_CHECK | \
182 HFI1_CAP_NO_INTEGRITY)
183
184 #define HFI1_USER_SWVERSION ((HFI1_USER_SWMAJOR << HFI1_SWMAJOR_SHIFT) | \
185 HFI1_USER_SWMINOR)
186
187 #ifndef HFI1_KERN_TYPE
188 #define HFI1_KERN_TYPE 0
189 #endif
190
191 /*
192 * Similarly, this is the kernel version going back to the user. It's
193 * slightly different, in that we want to tell if the driver was built as
194 * part of a Intel release, or from the driver from openfabrics.org,
195 * kernel.org, or a standard distribution, for support reasons.
196 * The high bit is 0 for non-Intel and 1 for Intel-built/supplied.
197 *
198 * It's returned by the driver to the user code during initialization in the
199 * spi_sw_version field of hfi1_base_info, so the user code can in turn
200 * check for compatibility with the kernel.
201 */
202 #define HFI1_KERN_SWVERSION ((HFI1_KERN_TYPE << 31) | HFI1_USER_SWVERSION)
203
204 /*
205 * Define the driver version number. This is something that refers only
206 * to the driver itself, not the software interfaces it supports.
207 */
208 #ifndef HFI1_DRIVER_VERSION_BASE
209 #define HFI1_DRIVER_VERSION_BASE "0.9-294"
210 #endif
211
212 /* create the final driver version string */
213 #ifdef HFI1_IDSTR
214 #define HFI1_DRIVER_VERSION HFI1_DRIVER_VERSION_BASE " " HFI1_IDSTR
215 #else
216 #define HFI1_DRIVER_VERSION HFI1_DRIVER_VERSION_BASE
217 #endif
218
219 /*
220 * Diagnostics can send a packet by writing the following
221 * struct to the diag packet special file.
222 *
223 * This allows a custom PBC qword, so that special modes and deliberate
224 * changes to CRCs can be used.
225 */
226 #define _DIAG_PKT_VERS 1
227 struct diag_pkt {
228 __u16 version; /* structure version */
229 __u16 unit; /* which device */
230 __u16 sw_index; /* send sw index to use */
231 __u16 len; /* data length, in bytes */
232 __u16 port; /* port number */
233 __u16 unused;
234 __u32 flags; /* call flags */
235 __u64 data; /* user data pointer */
236 __u64 pbc; /* PBC for the packet */
237 };
238
239 /* diag_pkt flags */
240 #define F_DIAGPKT_WAIT 0x1 /* wait until packet is sent */
241
242 /*
243 * The next set of defines are for packet headers, and chip register
244 * and memory bits that are visible to and/or used by user-mode software.
245 */
246
247 /*
248 * Receive Header Flags
249 */
250 #define RHF_PKT_LEN_SHIFT 0
251 #define RHF_PKT_LEN_MASK 0xfffull
252 #define RHF_PKT_LEN_SMASK (RHF_PKT_LEN_MASK << RHF_PKT_LEN_SHIFT)
253
254 #define RHF_RCV_TYPE_SHIFT 12
255 #define RHF_RCV_TYPE_MASK 0x7ull
256 #define RHF_RCV_TYPE_SMASK (RHF_RCV_TYPE_MASK << RHF_RCV_TYPE_SHIFT)
257
258 #define RHF_USE_EGR_BFR_SHIFT 15
259 #define RHF_USE_EGR_BFR_MASK 0x1ull
260 #define RHF_USE_EGR_BFR_SMASK (RHF_USE_EGR_BFR_MASK << RHF_USE_EGR_BFR_SHIFT)
261
262 #define RHF_EGR_INDEX_SHIFT 16
263 #define RHF_EGR_INDEX_MASK 0x7ffull
264 #define RHF_EGR_INDEX_SMASK (RHF_EGR_INDEX_MASK << RHF_EGR_INDEX_SHIFT)
265
266 #define RHF_DC_INFO_SHIFT 27
267 #define RHF_DC_INFO_MASK 0x1ull
268 #define RHF_DC_INFO_SMASK (RHF_DC_INFO_MASK << RHF_DC_INFO_SHIFT)
269
270 #define RHF_RCV_SEQ_SHIFT 28
271 #define RHF_RCV_SEQ_MASK 0xfull
272 #define RHF_RCV_SEQ_SMASK (RHF_RCV_SEQ_MASK << RHF_RCV_SEQ_SHIFT)
273
274 #define RHF_EGR_OFFSET_SHIFT 32
275 #define RHF_EGR_OFFSET_MASK 0xfffull
276 #define RHF_EGR_OFFSET_SMASK (RHF_EGR_OFFSET_MASK << RHF_EGR_OFFSET_SHIFT)
277 #define RHF_HDRQ_OFFSET_SHIFT 44
278 #define RHF_HDRQ_OFFSET_MASK 0x1ffull
279 #define RHF_HDRQ_OFFSET_SMASK (RHF_HDRQ_OFFSET_MASK << RHF_HDRQ_OFFSET_SHIFT)
280 #define RHF_K_HDR_LEN_ERR (0x1ull << 53)
281 #define RHF_DC_UNC_ERR (0x1ull << 54)
282 #define RHF_DC_ERR (0x1ull << 55)
283 #define RHF_RCV_TYPE_ERR_SHIFT 56
284 #define RHF_RCV_TYPE_ERR_MASK 0x7ul
285 #define RHF_RCV_TYPE_ERR_SMASK (RHF_RCV_TYPE_ERR_MASK << RHF_RCV_TYPE_ERR_SHIFT)
286 #define RHF_TID_ERR (0x1ull << 59)
287 #define RHF_LEN_ERR (0x1ull << 60)
288 #define RHF_ECC_ERR (0x1ull << 61)
289 #define RHF_RESERVED (0x1ull << 62)
290 #define RHF_ICRC_ERR (0x1ull << 63)
291
292 #define RHF_ERROR_SMASK 0xffe0000000000000ull /* bits 63:53 */
293
294 /* RHF receive types */
295 #define RHF_RCV_TYPE_EXPECTED 0
296 #define RHF_RCV_TYPE_EAGER 1
297 #define RHF_RCV_TYPE_IB 2 /* normal IB, IB Raw, or IPv6 */
298 #define RHF_RCV_TYPE_ERROR 3
299 #define RHF_RCV_TYPE_BYPASS 4
300 #define RHF_RCV_TYPE_INVALID5 5
301 #define RHF_RCV_TYPE_INVALID6 6
302 #define RHF_RCV_TYPE_INVALID7 7
303
304 /* RHF receive type error - expected packet errors */
305 #define RHF_RTE_EXPECTED_FLOW_SEQ_ERR 0x2
306 #define RHF_RTE_EXPECTED_FLOW_GEN_ERR 0x4
307
308 /* RHF receive type error - eager packet errors */
309 #define RHF_RTE_EAGER_NO_ERR 0x0
310
311 /* RHF receive type error - IB packet errors */
312 #define RHF_RTE_IB_NO_ERR 0x0
313
314 /* RHF receive type error - error packet errors */
315 #define RHF_RTE_ERROR_NO_ERR 0x0
316 #define RHF_RTE_ERROR_OP_CODE_ERR 0x1
317 #define RHF_RTE_ERROR_KHDR_MIN_LEN_ERR 0x2
318 #define RHF_RTE_ERROR_KHDR_HCRC_ERR 0x3
319 #define RHF_RTE_ERROR_KHDR_KVER_ERR 0x4
320 #define RHF_RTE_ERROR_CONTEXT_ERR 0x5
321 #define RHF_RTE_ERROR_KHDR_TID_ERR 0x6
322
323 /* RHF receive type error - bypass packet errors */
324 #define RHF_RTE_BYPASS_NO_ERR 0x0
325
326 /* IB - LRH header constants */
327 #define HFI1_LRH_GRH 0x0003 /* 1. word of IB LRH - next header: GRH */
328 #define HFI1_LRH_BTH 0x0002 /* 1. word of IB LRH - next header: BTH */
329
330 /* misc. */
331 #define SC15_PACKET 0xF
332 #define SIZE_OF_CRC 1
333 #define SIZE_OF_LT 1
334 #define MAX_16B_PADDING 12 /* CRC = 4, LT = 1, Pad = 0 to 7 bytes */
335
336 #define LIM_MGMT_P_KEY 0x7FFF
337 #define FULL_MGMT_P_KEY 0xFFFF
338
339 #define DEFAULT_P_KEY LIM_MGMT_P_KEY
340
341 #define HFI1_PSM_IOC_BASE_SEQ 0x0
342
343 /* Number of BTH.PSN bits used for sequence number in expected rcvs */
344 #define HFI1_KDETH_BTH_SEQ_SHIFT 11
345 #define HFI1_KDETH_BTH_SEQ_MASK (BIT(HFI1_KDETH_BTH_SEQ_SHIFT) - 1)
346
rhf_to_cpu(const __le32 * rbuf)347 static inline __u64 rhf_to_cpu(const __le32 *rbuf)
348 {
349 return __le64_to_cpu(*((__le64 *)rbuf));
350 }
351
rhf_err_flags(u64 rhf)352 static inline u64 rhf_err_flags(u64 rhf)
353 {
354 return rhf & RHF_ERROR_SMASK;
355 }
356
rhf_rcv_type(u64 rhf)357 static inline u32 rhf_rcv_type(u64 rhf)
358 {
359 return (rhf >> RHF_RCV_TYPE_SHIFT) & RHF_RCV_TYPE_MASK;
360 }
361
rhf_rcv_type_err(u64 rhf)362 static inline u32 rhf_rcv_type_err(u64 rhf)
363 {
364 return (rhf >> RHF_RCV_TYPE_ERR_SHIFT) & RHF_RCV_TYPE_ERR_MASK;
365 }
366
367 /* return size is in bytes, not DWORDs */
rhf_pkt_len(u64 rhf)368 static inline u32 rhf_pkt_len(u64 rhf)
369 {
370 return ((rhf & RHF_PKT_LEN_SMASK) >> RHF_PKT_LEN_SHIFT) << 2;
371 }
372
rhf_egr_index(u64 rhf)373 static inline u32 rhf_egr_index(u64 rhf)
374 {
375 return (rhf >> RHF_EGR_INDEX_SHIFT) & RHF_EGR_INDEX_MASK;
376 }
377
rhf_rcv_seq(u64 rhf)378 static inline u32 rhf_rcv_seq(u64 rhf)
379 {
380 return (rhf >> RHF_RCV_SEQ_SHIFT) & RHF_RCV_SEQ_MASK;
381 }
382
383 /* returned offset is in DWORDS */
rhf_hdrq_offset(u64 rhf)384 static inline u32 rhf_hdrq_offset(u64 rhf)
385 {
386 return (rhf >> RHF_HDRQ_OFFSET_SHIFT) & RHF_HDRQ_OFFSET_MASK;
387 }
388
rhf_use_egr_bfr(u64 rhf)389 static inline u64 rhf_use_egr_bfr(u64 rhf)
390 {
391 return rhf & RHF_USE_EGR_BFR_SMASK;
392 }
393
rhf_dc_info(u64 rhf)394 static inline u64 rhf_dc_info(u64 rhf)
395 {
396 return rhf & RHF_DC_INFO_SMASK;
397 }
398
rhf_egr_buf_offset(u64 rhf)399 static inline u32 rhf_egr_buf_offset(u64 rhf)
400 {
401 return (rhf >> RHF_EGR_OFFSET_SHIFT) & RHF_EGR_OFFSET_MASK;
402 }
403 #endif /* _COMMON_H */
404
