2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 * $Id: mthca_provider.h 1349 2004-12-16 21:09:43Z roland $
37 #ifndef MTHCA_PROVIDER_H
38 #define MTHCA_PROVIDER_H
43 #define MTHCA_MPT_FLAG_ATOMIC (1 << 14)
44 #define MTHCA_MPT_FLAG_REMOTE_WRITE (1 << 13)
45 #define MTHCA_MPT_FLAG_REMOTE_READ (1 << 12)
46 #define MTHCA_MPT_FLAG_LOCAL_WRITE (1 << 11)
47 #define MTHCA_MPT_FLAG_LOCAL_READ (1 << 10)
49 struct mthca_buf_list
{
51 DECLARE_PCI_UNMAP_ADDR(mapping
)
59 struct mthca_user_db_table
;
61 struct mthca_ucontext
{
62 struct ib_ucontext ibucontext
;
64 struct mthca_user_db_table
*db_tab
;
71 struct mthca_mtt
*mtt
;
76 struct ib_fmr_attr attr
;
77 struct mthca_mtt
*mtt
;
81 struct mthca_mpt_entry __iomem
*mpt
;
85 struct mthca_mpt_entry
*mpt
;
100 struct mthca_dev
*dev
;
108 struct mthca_buf_list
*page_list
;
122 enum mthca_ah_type type
;
129 * Quick description of our CQ/QP locking scheme:
131 * We have one global lock that protects dev->cq/qp_table. Each
132 * struct mthca_cq/qp also has its own lock. An individual qp lock
133 * may be taken inside of an individual cq lock. Both cqs attached to
134 * a qp may be locked, with the send cq locked first. No other
135 * nesting should be done.
137 * Each struct mthca_cq/qp also has an atomic_t ref count. The
138 * pointer from the cq/qp_table to the struct counts as one reference.
139 * This reference also is good for access through the consumer API, so
140 * modifying the CQ/QP etc doesn't need to take another reference.
141 * Access because of a completion being polled does need a reference.
143 * Finally, each struct mthca_cq/qp has a wait_queue_head_t for the
144 * destroy function to sleep on.
146 * This means that access from the consumer API requires nothing but
147 * taking the struct's lock.
149 * Access because of a completion event should go as follows:
150 * - lock cq/qp_table and look up struct
151 * - increment ref count in struct
152 * - drop cq/qp_table lock
153 * - lock struct, do your thing, and unlock struct
154 * - decrement ref count; if zero, wake up waiters
156 * To destroy a CQ/QP, we can do the following:
157 * - lock cq/qp_table, remove pointer, unlock cq/qp_table lock
158 * - decrement ref count
159 * - wait_event until ref count is zero
161 * It is the consumer's responsibilty to make sure that no QP
162 * operations (WQE posting or state modification) are pending when the
163 * QP is destroyed. Also, the consumer must make sure that calls to
164 * qp_modify are serialized.
166 * Possible optimizations (wait for profile data to see if/where we
167 * have locks bouncing between CPUs):
168 * - split cq/qp table lock into n separate (cache-aligned) locks,
169 * indexed (say) by the page in the table
170 * - split QP struct lock into three (one for common info, one for the
171 * send queue and one for the receive queue)
183 /* Next fields are Arbel only */
191 struct mthca_buf_list direct
;
192 struct mthca_buf_list
*page_list
;
195 wait_queue_head_t wait
;
209 int db_index
; /* Arbel only */
227 enum ib_sig_type sq_policy
;
232 struct mthca_buf_list direct
;
233 struct mthca_buf_list
*page_list
;
236 wait_queue_head_t wait
;
245 struct ib_ud_header ud_header
;
248 dma_addr_t header_dma
;
251 static inline struct mthca_ucontext
*to_mucontext(struct ib_ucontext
*ibucontext
)
253 return container_of(ibucontext
, struct mthca_ucontext
, ibucontext
);
256 static inline struct mthca_fmr
*to_mfmr(struct ib_fmr
*ibmr
)
258 return container_of(ibmr
, struct mthca_fmr
, ibmr
);
261 static inline struct mthca_mr
*to_mmr(struct ib_mr
*ibmr
)
263 return container_of(ibmr
, struct mthca_mr
, ibmr
);
266 static inline struct mthca_pd
*to_mpd(struct ib_pd
*ibpd
)
268 return container_of(ibpd
, struct mthca_pd
, ibpd
);
271 static inline struct mthca_ah
*to_mah(struct ib_ah
*ibah
)
273 return container_of(ibah
, struct mthca_ah
, ibah
);
276 static inline struct mthca_cq
*to_mcq(struct ib_cq
*ibcq
)
278 return container_of(ibcq
, struct mthca_cq
, ibcq
);
281 static inline struct mthca_qp
*to_mqp(struct ib_qp
*ibqp
)
283 return container_of(ibqp
, struct mthca_qp
, ibqp
);
286 static inline struct mthca_sqp
*to_msqp(struct mthca_qp
*qp
)
288 return container_of(qp
, struct mthca_sqp
, qp
);
291 #endif /* MTHCA_PROVIDER_H */
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