summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/hw/mthca/mthca_provider.h
blob: c621f8794b8820d11e6293d62c2ce35d11e8e7ee (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
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
/*
 * Copyright (c) 2004 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. 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 MTHCA_PROVIDER_H
#define MTHCA_PROVIDER_H

#include <rdma/ib_verbs.h>
#include <rdma/ib_pack.h>

#define MTHCA_MPT_FLAG_ATOMIC        (1 << 14)
#define MTHCA_MPT_FLAG_REMOTE_WRITE  (1 << 13)
#define MTHCA_MPT_FLAG_REMOTE_READ   (1 << 12)
#define MTHCA_MPT_FLAG_LOCAL_WRITE   (1 << 11)
#define MTHCA_MPT_FLAG_LOCAL_READ    (1 << 10)

struct mthca_buf_list {
	void *buf;
	DECLARE_PCI_UNMAP_ADDR(mapping)
};

union mthca_buf {
	struct mthca_buf_list direct;
	struct mthca_buf_list *page_list;
};

struct mthca_uar {
	unsigned long pfn;
	int           index;
};

struct mthca_user_db_table;

struct mthca_ucontext {
	struct ib_ucontext          ibucontext;
	struct mthca_uar            uar;
	struct mthca_user_db_table *db_tab;
	int			    reg_mr_warned;
};

struct mthca_mtt;

struct mthca_mr {
	struct ib_mr      ibmr;
	struct ib_umem   *umem;
	struct mthca_mtt *mtt;
};

struct mthca_fmr {
	struct ib_fmr      ibmr;
	struct ib_fmr_attr attr;
	struct mthca_mtt  *mtt;
	int                maps;
	union {
		struct {
			struct mthca_mpt_entry __iomem *mpt;
			u64 __iomem *mtts;
		} tavor;
		struct {
			struct mthca_mpt_entry *mpt;
			__be64 *mtts;
			dma_addr_t dma_handle;
		} arbel;
	} mem;
};

struct mthca_pd {
	struct ib_pd    ibpd;
	u32             pd_num;
	atomic_t        sqp_count;
	struct mthca_mr ntmr;
	int             privileged;
};

struct mthca_eq {
	struct mthca_dev      *dev;
	int                    eqn;
	u32                    eqn_mask;
	u32                    cons_index;
	u16                    msi_x_vector;
	u16                    msi_x_entry;
	int                    have_irq;
	int                    nent;
	struct mthca_buf_list *page_list;
	struct mthca_mr        mr;
};

struct mthca_av;

enum mthca_ah_type {
	MTHCA_AH_ON_HCA,
	MTHCA_AH_PCI_POOL,
	MTHCA_AH_KMALLOC
};

struct mthca_ah {
	struct ib_ah       ibah;
	enum mthca_ah_type type;
	u32                key;
	struct mthca_av   *av;
	dma_addr_t         avdma;
};

/*
 * Quick description of our CQ/QP locking scheme:
 *
 * We have one global lock that protects dev->cq/qp_table.  Each
 * struct mthca_cq/qp also has its own lock.  An individual qp lock
 * may be taken inside of an individual cq lock.  Both cqs attached to
 * a qp may be locked, with the cq with the lower cqn locked first.
 * No other nesting should be done.
 *
 * Each struct mthca_cq/qp also has an ref count, protected by the
 * corresponding table lock.  The pointer from the cq/qp_table to the
 * struct counts as one reference.  This reference also is good for
 * access through the consumer API, so modifying the CQ/QP etc doesn't
 * need to take another reference.  Access to a QP because of a
 * completion being polled does not need a reference either.
 *
 * Finally, each struct mthca_cq/qp has a wait_queue_head_t for the
 * destroy function to sleep on.
 *
 * This means that access from the consumer API requires nothing but
 * taking the struct's lock.
 *
 * Access because of a completion event should go as follows:
 * - lock cq/qp_table and look up struct
 * - increment ref count in struct
 * - drop cq/qp_table lock
 * - lock struct, do your thing, and unlock struct
 * - decrement ref count; if zero, wake up waiters
 *
 * To destroy a CQ/QP, we can do the following:
 * - lock cq/qp_table
 * - remove pointer and decrement ref count
 * - unlock cq/qp_table lock
 * - wait_event until ref count is zero
 *
 * It is the consumer's responsibilty to make sure that no QP
 * operations (WQE posting or state modification) are pending when a
 * QP is destroyed.  Also, the consumer must make sure that calls to
 * qp_modify are serialized.  Similarly, the consumer is responsible
 * for ensuring that no CQ resize operations are pending when a CQ
 * is destroyed.
 *
 * Possible optimizations (wait for profile data to see if/where we
 * have locks bouncing between CPUs):
 * - split cq/qp table lock into n separate (cache-aligned) locks,
 *   indexed (say) by the page in the table
 * - split QP struct lock into three (one for common info, one for the
 *   send queue and one for the receive queue)
 */

struct mthca_cq_buf {
	union mthca_buf		queue;
	struct mthca_mr		mr;
	int			is_direct;
};

struct mthca_cq_resize {
	struct mthca_cq_buf	buf;
	int			cqe;
	enum {
		CQ_RESIZE_ALLOC,
		CQ_RESIZE_READY,
		CQ_RESIZE_SWAPPED
	}			state;
};

struct mthca_cq {
	struct ib_cq		ibcq;
	spinlock_t		lock;
	int			refcount;
	int			cqn;
	u32			cons_index;
	struct mthca_cq_buf	buf;
	struct mthca_cq_resize *resize_buf;
	int			is_kernel;

	/* Next fields are Arbel only */
	int			set_ci_db_index;
	__be32		       *set_ci_db;
	int			arm_db_index;
	__be32		       *arm_db;
	int			arm_sn;

	wait_queue_head_t	wait;
	struct mutex		mutex;
};

struct mthca_srq {
	struct ib_srq		ibsrq;
	spinlock_t		lock;
	int			refcount;
	int			srqn;
	int			max;
	int			max_gs;
	int			wqe_shift;
	int			first_free;
	int			last_free;
	u16			counter;  /* Arbel only */
	int			db_index; /* Arbel only */
	__be32		       *db;       /* Arbel only */
	void		       *last;

	int			is_direct;
	u64		       *wrid;
	union mthca_buf		queue;
	struct mthca_mr		mr;

	wait_queue_head_t	wait;
	struct mutex		mutex;
};

struct mthca_wq {
	spinlock_t lock;
	int        max;
	unsigned   next_ind;
	unsigned   last_comp;
	unsigned   head;
	unsigned   tail;
	void      *last;
	int        max_gs;
	int        wqe_shift;

	int        db_index;	/* Arbel only */
	__be32    *db;
};

struct mthca_qp {
	struct ib_qp           ibqp;
	int                    refcount;
	u32                    qpn;
	int                    is_direct;
	u8                     port; /* for SQP and memfree use only */
	u8                     alt_port; /* for memfree use only */
	u8                     transport;
	u8                     state;
	u8                     atomic_rd_en;
	u8                     resp_depth;

	struct mthca_mr        mr;

	struct mthca_wq        rq;
	struct mthca_wq        sq;
	enum ib_sig_type       sq_policy;
	int                    send_wqe_offset;
	int                    max_inline_data;

	u64                   *wrid;
	union mthca_buf	       queue;

	wait_queue_head_t      wait;
	struct mutex	       mutex;
};

struct mthca_sqp {
	struct mthca_qp qp;
	int             pkey_index;
	u32             qkey;
	u32             send_psn;
	struct ib_ud_header ud_header;
	int             header_buf_size;
	void           *header_buf;
	dma_addr_t      header_dma;
};

static inline struct mthca_ucontext *to_mucontext(struct ib_ucontext *ibucontext)
{
	return container_of(ibucontext, struct mthca_ucontext, ibucontext);
}

static inline struct mthca_fmr *to_mfmr(struct ib_fmr *ibmr)
{
	return container_of(ibmr, struct mthca_fmr, ibmr);
}

static inline struct mthca_mr *to_mmr(struct ib_mr *ibmr)
{
	return container_of(ibmr, struct mthca_mr, ibmr);
}

static inline struct mthca_pd *to_mpd(struct ib_pd *ibpd)
{
	return container_of(ibpd, struct mthca_pd, ibpd);
}

static inline struct mthca_ah *to_mah(struct ib_ah *ibah)
{
	return container_of(ibah, struct mthca_ah, ibah);
}

static inline struct mthca_cq *to_mcq(struct ib_cq *ibcq)
{
	return container_of(ibcq, struct mthca_cq, ibcq);
}

static inline struct mthca_srq *to_msrq(struct ib_srq *ibsrq)
{
	return container_of(ibsrq, struct mthca_srq, ibsrq);
}

static inline struct mthca_qp *to_mqp(struct ib_qp *ibqp)
{
	return container_of(ibqp, struct mthca_qp, ibqp);
}

static inline struct mthca_sqp *to_msqp(struct mthca_qp *qp)
{
	return container_of(qp, struct mthca_sqp, qp);
}

#endif /* MTHCA_PROVIDER_H */