2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2005 Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
6 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
7 * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
9 * This software is available to you under a choice of one of two
10 * licenses. You may choose to be licensed under the terms of the GNU
11 * General Public License (GPL) Version 2, available from the file
12 * COPYING in the main directory of this source tree, or the
13 * OpenIB.org BSD license below:
15 * Redistribution and use in source and binary forms, with or
16 * without modification, are permitted provided that the following
19 * - Redistributions of source code must retain the above
20 * copyright notice, this list of conditions and the following
23 * - Redistributions in binary form must reproduce the above
24 * copyright notice, this list of conditions and the following
25 * disclaimer in the documentation and/or other materials
26 * provided with the distribution.
28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
29 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
31 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
32 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
33 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
34 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
38 #include <linux/gfp.h>
42 #include "c2_status.h"
44 #define C2_CQ_MSG_SIZE ((sizeof(struct c2wr_ce) + 32-1) & ~(32-1))
46 static struct c2_cq
*c2_cq_get(struct c2_dev
*c2dev
, int cqn
)
51 spin_lock_irqsave(&c2dev
->lock
, flags
);
52 cq
= c2dev
->qptr_array
[cqn
];
54 spin_unlock_irqrestore(&c2dev
->lock
, flags
);
57 atomic_inc(&cq
->refcount
);
58 spin_unlock_irqrestore(&c2dev
->lock
, flags
);
62 static void c2_cq_put(struct c2_cq
*cq
)
64 if (atomic_dec_and_test(&cq
->refcount
))
68 void c2_cq_event(struct c2_dev
*c2dev
, u32 mq_index
)
72 cq
= c2_cq_get(c2dev
, mq_index
);
74 printk("discarding events on destroyed CQN=%d\n", mq_index
);
78 (*cq
->ibcq
.comp_handler
) (&cq
->ibcq
, cq
->ibcq
.cq_context
);
82 void c2_cq_clean(struct c2_dev
*c2dev
, struct c2_qp
*qp
, u32 mq_index
)
87 cq
= c2_cq_get(c2dev
, mq_index
);
91 spin_lock_irq(&cq
->lock
);
93 if (q
&& !c2_mq_empty(q
)) {
97 while (priv
!= be16_to_cpu(*q
->shared
)) {
98 msg
= (struct c2wr_ce
*)
99 (q
->msg_pool
.host
+ priv
* q
->msg_size
);
100 if (msg
->qp_user_context
== (u64
) (unsigned long) qp
) {
101 msg
->qp_user_context
= (u64
) 0;
103 priv
= (priv
+ 1) % q
->q_size
;
106 spin_unlock_irq(&cq
->lock
);
110 static inline enum ib_wc_status
c2_cqe_status_to_openib(u8 status
)
114 return IB_WC_SUCCESS
;
116 return IB_WC_WR_FLUSH_ERR
;
117 case CCERR_BASE_AND_BOUNDS_VIOLATION
:
118 return IB_WC_LOC_PROT_ERR
;
119 case CCERR_ACCESS_VIOLATION
:
120 return IB_WC_LOC_ACCESS_ERR
;
121 case CCERR_TOTAL_LENGTH_TOO_BIG
:
122 return IB_WC_LOC_LEN_ERR
;
123 case CCERR_INVALID_WINDOW
:
124 return IB_WC_MW_BIND_ERR
;
126 return IB_WC_GENERAL_ERR
;
131 static inline int c2_poll_one(struct c2_dev
*c2dev
,
132 struct c2_cq
*cq
, struct ib_wc
*entry
)
138 ce
= c2_mq_consume(&cq
->mq
);
144 * if the qp returned is null then this qp has already
145 * been freed and we are unable process the completion.
146 * try pulling the next message
149 (struct c2_qp
*) (unsigned long) ce
->qp_user_context
) == NULL
) {
151 ce
= c2_mq_consume(&cq
->mq
);
156 entry
->status
= c2_cqe_status_to_openib(c2_wr_get_result(ce
));
157 entry
->wr_id
= ce
->hdr
.context
;
158 entry
->qp
= &qp
->ibqp
;
163 entry
->dlid_path_bits
= 0;
164 entry
->pkey_index
= 0;
166 switch (c2_wr_get_id(ce
)) {
167 case C2_WR_TYPE_SEND
:
168 entry
->opcode
= IB_WC_SEND
;
170 case C2_WR_TYPE_RDMA_WRITE
:
171 entry
->opcode
= IB_WC_RDMA_WRITE
;
173 case C2_WR_TYPE_RDMA_READ
:
174 entry
->opcode
= IB_WC_RDMA_READ
;
176 case C2_WR_TYPE_BIND_MW
:
177 entry
->opcode
= IB_WC_BIND_MW
;
179 case C2_WR_TYPE_RECV
:
180 entry
->byte_len
= be32_to_cpu(ce
->bytes_rcvd
);
181 entry
->opcode
= IB_WC_RECV
;
188 /* consume the WQEs */
190 c2_mq_lconsume(&qp
->rq_mq
, 1);
192 c2_mq_lconsume(&qp
->sq_mq
,
193 be32_to_cpu(c2_wr_get_wqe_count(ce
)) + 1);
195 /* free the message */
201 int c2_poll_cq(struct ib_cq
*ibcq
, int num_entries
, struct ib_wc
*entry
)
203 struct c2_dev
*c2dev
= to_c2dev(ibcq
->device
);
204 struct c2_cq
*cq
= to_c2cq(ibcq
);
208 spin_lock_irqsave(&cq
->lock
, flags
);
210 for (npolled
= 0; npolled
< num_entries
; ++npolled
) {
212 err
= c2_poll_one(c2dev
, cq
, entry
+ npolled
);
217 spin_unlock_irqrestore(&cq
->lock
, flags
);
222 int c2_arm_cq(struct ib_cq
*ibcq
, enum ib_cq_notify_flags notify_flags
)
224 struct c2_mq_shared __iomem
*shared
;
230 shared
= cq
->mq
.peer
;
232 if ((notify_flags
& IB_CQ_SOLICITED_MASK
) == IB_CQ_NEXT_COMP
)
233 writeb(C2_CQ_NOTIFICATION_TYPE_NEXT
, &shared
->notification_type
);
234 else if ((notify_flags
& IB_CQ_SOLICITED_MASK
) == IB_CQ_SOLICITED
)
235 writeb(C2_CQ_NOTIFICATION_TYPE_NEXT_SE
, &shared
->notification_type
);
239 writeb(CQ_WAIT_FOR_DMA
| CQ_ARMED
, &shared
->armed
);
242 * Now read back shared->armed to make the PCI
243 * write synchronous. This is necessary for
244 * correct cq notification semantics.
246 readb(&shared
->armed
);
248 if (notify_flags
& IB_CQ_REPORT_MISSED_EVENTS
) {
249 spin_lock_irqsave(&cq
->lock
, flags
);
250 ret
= !c2_mq_empty(&cq
->mq
);
251 spin_unlock_irqrestore(&cq
->lock
, flags
);
257 static void c2_free_cq_buf(struct c2_dev
*c2dev
, struct c2_mq
*mq
)
259 dma_free_coherent(&c2dev
->pcidev
->dev
, mq
->q_size
* mq
->msg_size
,
260 mq
->msg_pool
.host
, pci_unmap_addr(mq
, mapping
));
263 static int c2_alloc_cq_buf(struct c2_dev
*c2dev
, struct c2_mq
*mq
, int q_size
,
268 pool_start
= dma_alloc_coherent(&c2dev
->pcidev
->dev
, q_size
* msg_size
,
269 &mq
->host_dma
, GFP_KERNEL
);
274 0, /* index (currently unknown) */
278 NULL
, /* peer (currently unknown) */
281 pci_unmap_addr_set(mq
, mapping
, mq
->host_dma
);
286 int c2_init_cq(struct c2_dev
*c2dev
, int entries
,
287 struct c2_ucontext
*ctx
, struct c2_cq
*cq
)
289 struct c2wr_cq_create_req wr
;
290 struct c2wr_cq_create_rep
*reply
;
291 unsigned long peer_pa
;
292 struct c2_vq_req
*vq_req
;
297 cq
->ibcq
.cqe
= entries
- 1;
298 cq
->is_kernel
= !ctx
;
300 /* Allocate a shared pointer */
301 cq
->mq
.shared
= c2_alloc_mqsp(c2dev
, c2dev
->kern_mqsp_pool
,
302 &cq
->mq
.shared_dma
, GFP_KERNEL
);
306 /* Allocate pages for the message pool */
307 err
= c2_alloc_cq_buf(c2dev
, &cq
->mq
, entries
+ 1, C2_CQ_MSG_SIZE
);
311 vq_req
= vq_req_alloc(c2dev
);
317 memset(&wr
, 0, sizeof(wr
));
318 c2_wr_set_id(&wr
, CCWR_CQ_CREATE
);
319 wr
.hdr
.context
= (unsigned long) vq_req
;
320 wr
.rnic_handle
= c2dev
->adapter_handle
;
321 wr
.msg_size
= cpu_to_be32(cq
->mq
.msg_size
);
322 wr
.depth
= cpu_to_be32(cq
->mq
.q_size
);
323 wr
.shared_ht
= cpu_to_be64(cq
->mq
.shared_dma
);
324 wr
.msg_pool
= cpu_to_be64(cq
->mq
.host_dma
);
325 wr
.user_context
= (u64
) (unsigned long) (cq
);
327 vq_req_get(c2dev
, vq_req
);
329 err
= vq_send_wr(c2dev
, (union c2wr
*) & wr
);
331 vq_req_put(c2dev
, vq_req
);
335 err
= vq_wait_for_reply(c2dev
, vq_req
);
339 reply
= (struct c2wr_cq_create_rep
*) (unsigned long) (vq_req
->reply_msg
);
345 if ((err
= c2_errno(reply
)) != 0)
348 cq
->adapter_handle
= reply
->cq_handle
;
349 cq
->mq
.index
= be32_to_cpu(reply
->mq_index
);
351 peer_pa
= c2dev
->pa
+ be32_to_cpu(reply
->adapter_shared
);
352 cq
->mq
.peer
= ioremap_nocache(peer_pa
, PAGE_SIZE
);
358 vq_repbuf_free(c2dev
, reply
);
359 vq_req_free(c2dev
, vq_req
);
361 spin_lock_init(&cq
->lock
);
362 atomic_set(&cq
->refcount
, 1);
363 init_waitqueue_head(&cq
->wait
);
366 * Use the MQ index allocated by the adapter to
367 * store the CQ in the qptr_array
369 cq
->cqn
= cq
->mq
.index
;
370 c2dev
->qptr_array
[cq
->cqn
] = cq
;
375 vq_repbuf_free(c2dev
, reply
);
377 vq_req_free(c2dev
, vq_req
);
379 c2_free_cq_buf(c2dev
, &cq
->mq
);
381 c2_free_mqsp(cq
->mq
.shared
);
386 void c2_free_cq(struct c2_dev
*c2dev
, struct c2_cq
*cq
)
389 struct c2_vq_req
*vq_req
;
390 struct c2wr_cq_destroy_req wr
;
391 struct c2wr_cq_destroy_rep
*reply
;
395 /* Clear CQ from the qptr array */
396 spin_lock_irq(&c2dev
->lock
);
397 c2dev
->qptr_array
[cq
->mq
.index
] = NULL
;
398 atomic_dec(&cq
->refcount
);
399 spin_unlock_irq(&c2dev
->lock
);
401 wait_event(cq
->wait
, !atomic_read(&cq
->refcount
));
403 vq_req
= vq_req_alloc(c2dev
);
408 memset(&wr
, 0, sizeof(wr
));
409 c2_wr_set_id(&wr
, CCWR_CQ_DESTROY
);
410 wr
.hdr
.context
= (unsigned long) vq_req
;
411 wr
.rnic_handle
= c2dev
->adapter_handle
;
412 wr
.cq_handle
= cq
->adapter_handle
;
414 vq_req_get(c2dev
, vq_req
);
416 err
= vq_send_wr(c2dev
, (union c2wr
*) & wr
);
418 vq_req_put(c2dev
, vq_req
);
422 err
= vq_wait_for_reply(c2dev
, vq_req
);
426 reply
= (struct c2wr_cq_destroy_rep
*) (unsigned long) (vq_req
->reply_msg
);
428 vq_repbuf_free(c2dev
, reply
);
430 vq_req_free(c2dev
, vq_req
);
433 c2_free_cq_buf(c2dev
, &cq
->mq
);