aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/sw/rxe/rxe_verbs.h
blob: 23c5002b513480b827e6f4f6a1794a85705fdcf6 (plain) (blame)
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
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
/*
 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
 * Copyright (c) 2015 System Fabric Works, 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.
 */

#ifndef RXE_VERBS_H
#define RXE_VERBS_H

#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <rdma/rdma_user_rxe.h>
#include "rxe_pool.h"
#include "rxe_task.h"
#include "rxe_hw_counters.h"

static inline int pkey_match(u16 key1, u16 key2)
{
	return (((key1 & 0x7fff) != 0) &&
		((key1 & 0x7fff) == (key2 & 0x7fff)) &&
		((key1 & 0x8000) || (key2 & 0x8000))) ? 1 : 0;
}

/* Return >0 if psn_a > psn_b
 *	   0 if psn_a == psn_b
 *	  <0 if psn_a < psn_b
 */
static inline int psn_compare(u32 psn_a, u32 psn_b)
{
	s32 diff;

	diff = (psn_a - psn_b) << 8;
	return diff;
}

struct rxe_ucontext {
	struct ib_ucontext ibuc;
	struct rxe_pool_entry	pelem;
};

struct rxe_pd {
	struct ib_pd            ibpd;
	struct rxe_pool_entry	pelem;
};

struct rxe_ah {
	struct ib_ah		ibah;
	struct rxe_pool_entry	pelem;
	struct rxe_pd		*pd;
	struct rxe_av		av;
};

struct rxe_cqe {
	union {
		struct ib_wc		ibwc;
		struct ib_uverbs_wc	uibwc;
	};
};

struct rxe_cq {
	struct rxe_pool_entry	pelem;
	struct ib_cq		ibcq;
	struct rxe_queue	*queue;
	spinlock_t		cq_lock;
	u8			notify;
	bool			is_dying;
	int			is_user;
	struct tasklet_struct	comp_task;
};

enum wqe_state {
	wqe_state_posted,
	wqe_state_processing,
	wqe_state_pending,
	wqe_state_done,
	wqe_state_error,
};

struct rxe_sq {
	int			max_wr;
	int			max_sge;
	int			max_inline;
	spinlock_t		sq_lock; /* guard queue */
	struct rxe_queue	*queue;
};

struct rxe_rq {
	int			max_wr;
	int			max_sge;
	spinlock_t		producer_lock; /* guard queue producer */
	spinlock_t		consumer_lock; /* guard queue consumer */
	struct rxe_queue	*queue;
};

struct rxe_srq {
	struct rxe_pool_entry	pelem;
	struct ib_srq		ibsrq;
	struct rxe_pd		*pd;
	struct rxe_rq		rq;
	u32			srq_num;

	int			limit;
	int			error;
};

enum rxe_qp_state {
	QP_STATE_RESET,
	QP_STATE_INIT,
	QP_STATE_READY,
	QP_STATE_DRAIN,		/* req only */
	QP_STATE_DRAINED,	/* req only */
	QP_STATE_ERROR
};

struct rxe_req_info {
	enum rxe_qp_state	state;
	int			wqe_index;
	u32			psn;
	int			opcode;
	atomic_t		rd_atomic;
	int			wait_fence;
	int			need_rd_atomic;
	int			wait_psn;
	int			need_retry;
	int			noack_pkts;
	struct rxe_task		task;
};

struct rxe_comp_info {
	u32			psn;
	int			opcode;
	int			timeout;
	int			timeout_retry;
	int			started_retry;
	u32			retry_cnt;
	u32			rnr_retry;
	struct rxe_task		task;
};

enum rdatm_res_state {
	rdatm_res_state_next,
	rdatm_res_state_new,
	rdatm_res_state_replay,
};

struct resp_res {
	int			type;
	int			replay;
	u32			first_psn;
	u32			last_psn;
	u32			cur_psn;
	enum rdatm_res_state	state;

	union {
		struct {
			struct sk_buff	*skb;
		} atomic;
		struct {
			struct rxe_mem	*mr;
			u64		va_org;
			u32		rkey;
			u32		length;
			u64		va;
			u32		resid;
		} read;
	};
};

struct rxe_resp_info {
	enum rxe_qp_state	state;
	u32			msn;
	u32			psn;
	u32			ack_psn;
	int			opcode;
	int			drop_msg;
	int			goto_error;
	int			sent_psn_nak;
	enum ib_wc_status	status;
	u8			aeth_syndrome;

	/* Receive only */
	struct rxe_recv_wqe	*wqe;

	/* RDMA read / atomic only */
	u64			va;
	struct rxe_mem		*mr;
	u32			resid;
	u32			rkey;
	u64			atomic_orig;

	/* SRQ only */
	struct {
		struct rxe_recv_wqe	wqe;
		struct ib_sge		sge[RXE_MAX_SGE];
	} srq_wqe;

	/* Responder resources. It's a circular list where the oldest
	 * resource is dropped first.
	 */
	struct resp_res		*resources;
	unsigned int		res_head;
	unsigned int		res_tail;
	struct resp_res		*res;
	struct rxe_task		task;
};

struct rxe_qp {
	struct rxe_pool_entry	pelem;
	struct ib_qp		ibqp;
	struct ib_qp_attr	attr;
	unsigned int		valid;
	unsigned int		mtu;
	int			is_user;

	struct rxe_pd		*pd;
	struct rxe_srq		*srq;
	struct rxe_cq		*scq;
	struct rxe_cq		*rcq;

	enum ib_sig_type	sq_sig_type;

	struct rxe_sq		sq;
	struct rxe_rq		rq;

	struct socket		*sk;
	u32			dst_cookie;
	u16			src_port;

	struct rxe_av		pri_av;
	struct rxe_av		alt_av;

	/* list of mcast groups qp has joined (for cleanup) */
	struct list_head	grp_list;
	spinlock_t		grp_lock; /* guard grp_list */

	struct sk_buff_head	req_pkts;
	struct sk_buff_head	resp_pkts;
	struct sk_buff_head	send_pkts;

	struct rxe_req_info	req;
	struct rxe_comp_info	comp;
	struct rxe_resp_info	resp;

	atomic_t		ssn;
	atomic_t		skb_out;
	int			need_req_skb;

	/* Timer for retranmitting packet when ACKs have been lost. RC
	 * only. The requester sets it when it is not already
	 * started. The responder resets it whenever an ack is
	 * received.
	 */
	struct timer_list retrans_timer;
	u64 qp_timeout_jiffies;

	/* Timer for handling RNR NAKS. */
	struct timer_list rnr_nak_timer;

	spinlock_t		state_lock; /* guard requester and completer */

	struct execute_work	cleanup_work;
};

enum rxe_mem_state {
	RXE_MEM_STATE_ZOMBIE,
	RXE_MEM_STATE_INVALID,
	RXE_MEM_STATE_FREE,
	RXE_MEM_STATE_VALID,
};

enum rxe_mem_type {
	RXE_MEM_TYPE_NONE,
	RXE_MEM_TYPE_DMA,
	RXE_MEM_TYPE_MR,
	RXE_MEM_TYPE_FMR,
	RXE_MEM_TYPE_MW,
};

#define RXE_BUF_PER_MAP		(PAGE_SIZE / sizeof(struct rxe_phys_buf))

struct rxe_phys_buf {
	u64      addr;
	u64      size;
};

struct rxe_map {
	struct rxe_phys_buf	buf[RXE_BUF_PER_MAP];
};

struct rxe_mem {
	struct rxe_pool_entry	pelem;
	union {
		struct ib_mr		ibmr;
		struct ib_mw		ibmw;
	};

	struct rxe_pd		*pd;
	struct ib_umem		*umem;

	u32			lkey;
	u32			rkey;

	enum rxe_mem_state	state;
	enum rxe_mem_type	type;
	u64			va;
	u64			iova;
	size_t			length;
	u32			offset;
	int			access;

	int			page_shift;
	int			page_mask;
	int			map_shift;
	int			map_mask;

	u32			num_buf;
	u32			nbuf;

	u32			max_buf;
	u32			num_map;

	struct rxe_map		**map;
};

struct rxe_mc_grp {
	struct rxe_pool_entry	pelem;
	spinlock_t		mcg_lock; /* guard group */
	struct rxe_dev		*rxe;
	struct list_head	qp_list;
	union ib_gid		mgid;
	int			num_qp;
	u32			qkey;
	u16			pkey;
};

struct rxe_mc_elem {
	struct rxe_pool_entry	pelem;
	struct list_head	qp_list;
	struct list_head	grp_list;
	struct rxe_qp		*qp;
	struct rxe_mc_grp	*grp;
};

struct rxe_port {
	struct ib_port_attr	attr;
	u16			*pkey_tbl;
	__be64			port_guid;
	__be64			subnet_prefix;
	spinlock_t		port_lock; /* guard port */
	unsigned int		mtu_cap;
	/* special QPs */
	u32			qp_smi_index;
	u32			qp_gsi_index;
};

struct rxe_dev {
	struct ib_device	ib_dev;
	struct ib_device_attr	attr;
	int			max_ucontext;
	int			max_inline_data;
	struct mutex	usdev_lock;

	struct net_device	*ndev;

	int			xmit_errors;

	struct rxe_pool		uc_pool;
	struct rxe_pool		pd_pool;
	struct rxe_pool		ah_pool;
	struct rxe_pool		srq_pool;
	struct rxe_pool		qp_pool;
	struct rxe_pool		cq_pool;
	struct rxe_pool		mr_pool;
	struct rxe_pool		mw_pool;
	struct rxe_pool		mc_grp_pool;
	struct rxe_pool		mc_elem_pool;

	spinlock_t		pending_lock; /* guard pending_mmaps */
	struct list_head	pending_mmaps;

	spinlock_t		mmap_offset_lock; /* guard mmap_offset */
	int			mmap_offset;

	atomic64_t		stats_counters[RXE_NUM_OF_COUNTERS];

	struct rxe_port		port;
	struct crypto_shash	*tfm;
};

static inline void rxe_counter_inc(struct rxe_dev *rxe, enum rxe_counters index)
{
	atomic64_inc(&rxe->stats_counters[index]);
}

static inline struct rxe_dev *to_rdev(struct ib_device *dev)
{
	return dev ? container_of(dev, struct rxe_dev, ib_dev) : NULL;
}

static inline struct rxe_ucontext *to_ruc(struct ib_ucontext *uc)
{
	return uc ? container_of(uc, struct rxe_ucontext, ibuc) : NULL;
}

static inline struct rxe_pd *to_rpd(struct ib_pd *pd)
{
	return pd ? container_of(pd, struct rxe_pd, ibpd) : NULL;
}

static inline struct rxe_ah *to_rah(struct ib_ah *ah)
{
	return ah ? container_of(ah, struct rxe_ah, ibah) : NULL;
}

static inline struct rxe_srq *to_rsrq(struct ib_srq *srq)
{
	return srq ? container_of(srq, struct rxe_srq, ibsrq) : NULL;
}

static inline struct rxe_qp *to_rqp(struct ib_qp *qp)
{
	return qp ? container_of(qp, struct rxe_qp, ibqp) : NULL;
}

static inline struct rxe_cq *to_rcq(struct ib_cq *cq)
{
	return cq ? container_of(cq, struct rxe_cq, ibcq) : NULL;
}

static inline struct rxe_mem *to_rmr(struct ib_mr *mr)
{
	return mr ? container_of(mr, struct rxe_mem, ibmr) : NULL;
}

static inline struct rxe_mem *to_rmw(struct ib_mw *mw)
{
	return mw ? container_of(mw, struct rxe_mem, ibmw) : NULL;
}

int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name);

void rxe_mc_cleanup(struct rxe_pool_entry *arg);

#endif /* RXE_VERBS_H */