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46#include <asm/page.h>
47#include <linux/io.h>
48#include <linux/wait.h>
49#include <rdma/ib_addr.h>
50#include <rdma/ib_smi.h>
51#include <rdma/ib_user_verbs.h>
52
53#include "pvrdma.h"
54
55static inline void get_cqs(struct pvrdma_qp *qp, struct pvrdma_cq **send_cq,
56 struct pvrdma_cq **recv_cq)
57{
58 *send_cq = to_vcq(qp->ibqp.send_cq);
59 *recv_cq = to_vcq(qp->ibqp.recv_cq);
60}
61
62static void pvrdma_lock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
63 unsigned long *scq_flags,
64 unsigned long *rcq_flags)
65 __acquires(scq->cq_lock) __acquires(rcq->cq_lock)
66{
67 if (scq == rcq) {
68 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
69 __acquire(rcq->cq_lock);
70 } else if (scq->cq_handle < rcq->cq_handle) {
71 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
72 spin_lock_irqsave_nested(&rcq->cq_lock, *rcq_flags,
73 SINGLE_DEPTH_NESTING);
74 } else {
75 spin_lock_irqsave(&rcq->cq_lock, *rcq_flags);
76 spin_lock_irqsave_nested(&scq->cq_lock, *scq_flags,
77 SINGLE_DEPTH_NESTING);
78 }
79}
80
81static void pvrdma_unlock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
82 unsigned long *scq_flags,
83 unsigned long *rcq_flags)
84 __releases(scq->cq_lock) __releases(rcq->cq_lock)
85{
86 if (scq == rcq) {
87 __release(rcq->cq_lock);
88 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
89 } else if (scq->cq_handle < rcq->cq_handle) {
90 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
91 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
92 } else {
93 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
94 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
95 }
96}
97
98static void pvrdma_reset_qp(struct pvrdma_qp *qp)
99{
100 struct pvrdma_cq *scq, *rcq;
101 unsigned long scq_flags, rcq_flags;
102
103
104 get_cqs(qp, &scq, &rcq);
105 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
106
107 _pvrdma_flush_cqe(qp, scq);
108 if (scq != rcq)
109 _pvrdma_flush_cqe(qp, rcq);
110
111 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
112
113
114
115
116
117 if (qp->rq.ring) {
118 atomic_set(&qp->rq.ring->cons_head, 0);
119 atomic_set(&qp->rq.ring->prod_tail, 0);
120 }
121 if (qp->sq.ring) {
122 atomic_set(&qp->sq.ring->cons_head, 0);
123 atomic_set(&qp->sq.ring->prod_tail, 0);
124 }
125}
126
127static int pvrdma_set_rq_size(struct pvrdma_dev *dev,
128 struct ib_qp_cap *req_cap,
129 struct pvrdma_qp *qp)
130{
131 if (req_cap->max_recv_wr > dev->dsr->caps.max_qp_wr ||
132 req_cap->max_recv_sge > dev->dsr->caps.max_sge) {
133 dev_warn(&dev->pdev->dev, "recv queue size invalid\n");
134 return -EINVAL;
135 }
136
137 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_recv_wr));
138 qp->rq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_recv_sge));
139
140
141 req_cap->max_recv_wr = qp->rq.wqe_cnt;
142 req_cap->max_recv_sge = qp->rq.max_sg;
143
144 qp->rq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_rq_wqe_hdr) +
145 sizeof(struct pvrdma_sge) *
146 qp->rq.max_sg);
147 qp->npages_recv = (qp->rq.wqe_cnt * qp->rq.wqe_size + PAGE_SIZE - 1) /
148 PAGE_SIZE;
149
150 return 0;
151}
152
153static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap,
154 struct pvrdma_qp *qp)
155{
156 if (req_cap->max_send_wr > dev->dsr->caps.max_qp_wr ||
157 req_cap->max_send_sge > dev->dsr->caps.max_sge) {
158 dev_warn(&dev->pdev->dev, "send queue size invalid\n");
159 return -EINVAL;
160 }
161
162 qp->sq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_send_wr));
163 qp->sq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_send_sge));
164
165
166 req_cap->max_send_wr = qp->sq.wqe_cnt;
167 req_cap->max_send_sge = qp->sq.max_sg;
168
169 qp->sq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_sq_wqe_hdr) +
170 sizeof(struct pvrdma_sge) *
171 qp->sq.max_sg);
172
173 qp->npages_send = PVRDMA_QP_NUM_HEADER_PAGES +
174 (qp->sq.wqe_cnt * qp->sq.wqe_size + PAGE_SIZE - 1) /
175 PAGE_SIZE;
176
177 return 0;
178}
179
180
181
182
183
184
185
186
187
188struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
189 struct ib_qp_init_attr *init_attr,
190 struct ib_udata *udata)
191{
192 struct pvrdma_qp *qp = NULL;
193 struct pvrdma_dev *dev = to_vdev(pd->device);
194 union pvrdma_cmd_req req;
195 union pvrdma_cmd_resp rsp;
196 struct pvrdma_cmd_create_qp *cmd = &req.create_qp;
197 struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp;
198 struct pvrdma_create_qp ucmd;
199 unsigned long flags;
200 int ret;
201 bool is_srq = !!init_attr->srq;
202
203 if (init_attr->create_flags) {
204 dev_warn(&dev->pdev->dev,
205 "invalid create queuepair flags %#x\n",
206 init_attr->create_flags);
207 return ERR_PTR(-EINVAL);
208 }
209
210 if (init_attr->qp_type != IB_QPT_RC &&
211 init_attr->qp_type != IB_QPT_UD &&
212 init_attr->qp_type != IB_QPT_GSI) {
213 dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n",
214 init_attr->qp_type);
215 return ERR_PTR(-EINVAL);
216 }
217
218 if (is_srq && !dev->dsr->caps.max_srq) {
219 dev_warn(&dev->pdev->dev,
220 "SRQs not supported by device\n");
221 return ERR_PTR(-EINVAL);
222 }
223
224 if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp))
225 return ERR_PTR(-ENOMEM);
226
227 switch (init_attr->qp_type) {
228 case IB_QPT_GSI:
229 if (init_attr->port_num == 0 ||
230 init_attr->port_num > pd->device->phys_port_cnt ||
231 udata) {
232 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n");
233 ret = -EINVAL;
234 goto err_qp;
235 }
236
237 case IB_QPT_RC:
238 case IB_QPT_UD:
239 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
240 if (!qp) {
241 ret = -ENOMEM;
242 goto err_qp;
243 }
244
245 spin_lock_init(&qp->sq.lock);
246 spin_lock_init(&qp->rq.lock);
247 mutex_init(&qp->mutex);
248 refcount_set(&qp->refcnt, 1);
249 init_completion(&qp->free);
250
251 qp->state = IB_QPS_RESET;
252 qp->is_kernel = !udata;
253
254 if (!qp->is_kernel) {
255 dev_dbg(&dev->pdev->dev,
256 "create queuepair from user space\n");
257
258 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
259 ret = -EFAULT;
260 goto err_qp;
261 }
262
263 if (!is_srq) {
264
265 qp->rumem = ib_umem_get(udata, ucmd.rbuf_addr,
266 ucmd.rbuf_size, 0, 0);
267 if (IS_ERR(qp->rumem)) {
268 ret = PTR_ERR(qp->rumem);
269 goto err_qp;
270 }
271 qp->srq = NULL;
272 } else {
273 qp->rumem = NULL;
274 qp->srq = to_vsrq(init_attr->srq);
275 }
276
277 qp->sumem = ib_umem_get(udata, ucmd.sbuf_addr,
278 ucmd.sbuf_size, 0, 0);
279 if (IS_ERR(qp->sumem)) {
280 if (!is_srq)
281 ib_umem_release(qp->rumem);
282 ret = PTR_ERR(qp->sumem);
283 goto err_qp;
284 }
285
286 qp->npages_send = ib_umem_page_count(qp->sumem);
287 if (!is_srq)
288 qp->npages_recv = ib_umem_page_count(qp->rumem);
289 else
290 qp->npages_recv = 0;
291 qp->npages = qp->npages_send + qp->npages_recv;
292 } else {
293 ret = pvrdma_set_sq_size(to_vdev(pd->device),
294 &init_attr->cap, qp);
295 if (ret)
296 goto err_qp;
297
298 ret = pvrdma_set_rq_size(to_vdev(pd->device),
299 &init_attr->cap, qp);
300 if (ret)
301 goto err_qp;
302
303 qp->npages = qp->npages_send + qp->npages_recv;
304
305
306 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE;
307
308
309 qp->rq.offset = qp->npages_send * PAGE_SIZE;
310 }
311
312 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
313 dev_warn(&dev->pdev->dev,
314 "overflow pages in queuepair\n");
315 ret = -EINVAL;
316 goto err_umem;
317 }
318
319 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages,
320 qp->is_kernel);
321 if (ret) {
322 dev_warn(&dev->pdev->dev,
323 "could not allocate page directory\n");
324 goto err_umem;
325 }
326
327 if (!qp->is_kernel) {
328 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
329 if (!is_srq)
330 pvrdma_page_dir_insert_umem(&qp->pdir,
331 qp->rumem,
332 qp->npages_send);
333 } else {
334
335 qp->sq.ring = qp->pdir.pages[0];
336 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1];
337 }
338 break;
339 default:
340 ret = -EINVAL;
341 goto err_qp;
342 }
343
344
345 init_attr->cap.max_inline_data = 0;
346
347 memset(cmd, 0, sizeof(*cmd));
348 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP;
349 cmd->pd_handle = to_vpd(pd)->pd_handle;
350 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
351 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
352 if (is_srq)
353 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle;
354 else
355 cmd->srq_handle = 0;
356 cmd->max_send_wr = init_attr->cap.max_send_wr;
357 cmd->max_recv_wr = init_attr->cap.max_recv_wr;
358 cmd->max_send_sge = init_attr->cap.max_send_sge;
359 cmd->max_recv_sge = init_attr->cap.max_recv_sge;
360 cmd->max_inline_data = init_attr->cap.max_inline_data;
361 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
362 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
363 cmd->is_srq = is_srq;
364 cmd->lkey = 0;
365 cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
366 cmd->total_chunks = qp->npages;
367 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;
368 cmd->pdir_dma = qp->pdir.dir_dma;
369
370 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n",
371 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge,
372 cmd->max_recv_sge);
373
374 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP);
375 if (ret < 0) {
376 dev_warn(&dev->pdev->dev,
377 "could not create queuepair, error: %d\n", ret);
378 goto err_pdir;
379 }
380
381
382 qp->qp_handle = resp->qpn;
383 qp->port = init_attr->port_num;
384 qp->ibqp.qp_num = resp->qpn;
385 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
386 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp;
387 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
388
389 return &qp->ibqp;
390
391err_pdir:
392 pvrdma_page_dir_cleanup(dev, &qp->pdir);
393err_umem:
394 ib_umem_release(qp->rumem);
395 ib_umem_release(qp->sumem);
396err_qp:
397 kfree(qp);
398 atomic_dec(&dev->num_qps);
399
400 return ERR_PTR(ret);
401}
402
403static void pvrdma_free_qp(struct pvrdma_qp *qp)
404{
405 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device);
406 struct pvrdma_cq *scq;
407 struct pvrdma_cq *rcq;
408 unsigned long flags, scq_flags, rcq_flags;
409
410
411 get_cqs(qp, &scq, &rcq);
412 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
413
414 _pvrdma_flush_cqe(qp, scq);
415 if (scq != rcq)
416 _pvrdma_flush_cqe(qp, rcq);
417
418 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
419 dev->qp_tbl[qp->qp_handle] = NULL;
420 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
421
422 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
423
424 if (refcount_dec_and_test(&qp->refcnt))
425 complete(&qp->free);
426 wait_for_completion(&qp->free);
427
428 ib_umem_release(qp->rumem);
429 ib_umem_release(qp->sumem);
430
431 pvrdma_page_dir_cleanup(dev, &qp->pdir);
432
433 kfree(qp);
434
435 atomic_dec(&dev->num_qps);
436}
437
438
439
440
441
442
443
444
445int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
446{
447 struct pvrdma_qp *vqp = to_vqp(qp);
448 union pvrdma_cmd_req req;
449 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp;
450 int ret;
451
452 memset(cmd, 0, sizeof(*cmd));
453 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP;
454 cmd->qp_handle = vqp->qp_handle;
455
456 ret = pvrdma_cmd_post(to_vdev(qp->device), &req, NULL, 0);
457 if (ret < 0)
458 dev_warn(&to_vdev(qp->device)->pdev->dev,
459 "destroy queuepair failed, error: %d\n", ret);
460
461 pvrdma_free_qp(vqp);
462
463 return 0;
464}
465
466
467
468
469
470
471
472
473
474
475int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
476 int attr_mask, struct ib_udata *udata)
477{
478 struct pvrdma_dev *dev = to_vdev(ibqp->device);
479 struct pvrdma_qp *qp = to_vqp(ibqp);
480 union pvrdma_cmd_req req;
481 union pvrdma_cmd_resp rsp;
482 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp;
483 enum ib_qp_state cur_state, next_state;
484 int ret;
485
486
487 mutex_lock(&qp->mutex);
488 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state :
489 qp->state;
490 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state;
491
492 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type,
493 attr_mask)) {
494 ret = -EINVAL;
495 goto out;
496 }
497
498 if (attr_mask & IB_QP_PORT) {
499 if (attr->port_num == 0 ||
500 attr->port_num > ibqp->device->phys_port_cnt) {
501 ret = -EINVAL;
502 goto out;
503 }
504 }
505
506 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
507 if (attr->min_rnr_timer > 31) {
508 ret = -EINVAL;
509 goto out;
510 }
511 }
512
513 if (attr_mask & IB_QP_PKEY_INDEX) {
514 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) {
515 ret = -EINVAL;
516 goto out;
517 }
518 }
519
520 if (attr_mask & IB_QP_QKEY)
521 qp->qkey = attr->qkey;
522
523 if (cur_state == next_state && cur_state == IB_QPS_RESET) {
524 ret = 0;
525 goto out;
526 }
527
528 qp->state = next_state;
529 memset(cmd, 0, sizeof(*cmd));
530 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP;
531 cmd->qp_handle = qp->qp_handle;
532 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
533 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state);
534 cmd->attrs.cur_qp_state =
535 ib_qp_state_to_pvrdma(attr->cur_qp_state);
536 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu);
537 cmd->attrs.path_mig_state =
538 ib_mig_state_to_pvrdma(attr->path_mig_state);
539 cmd->attrs.qkey = attr->qkey;
540 cmd->attrs.rq_psn = attr->rq_psn;
541 cmd->attrs.sq_psn = attr->sq_psn;
542 cmd->attrs.dest_qp_num = attr->dest_qp_num;
543 cmd->attrs.qp_access_flags =
544 ib_access_flags_to_pvrdma(attr->qp_access_flags);
545 cmd->attrs.pkey_index = attr->pkey_index;
546 cmd->attrs.alt_pkey_index = attr->alt_pkey_index;
547 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify;
548 cmd->attrs.sq_draining = attr->sq_draining;
549 cmd->attrs.max_rd_atomic = attr->max_rd_atomic;
550 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic;
551 cmd->attrs.min_rnr_timer = attr->min_rnr_timer;
552 cmd->attrs.port_num = attr->port_num;
553 cmd->attrs.timeout = attr->timeout;
554 cmd->attrs.retry_cnt = attr->retry_cnt;
555 cmd->attrs.rnr_retry = attr->rnr_retry;
556 cmd->attrs.alt_port_num = attr->alt_port_num;
557 cmd->attrs.alt_timeout = attr->alt_timeout;
558 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap);
559 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr);
560 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr);
561
562 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP);
563 if (ret < 0) {
564 dev_warn(&dev->pdev->dev,
565 "could not modify queuepair, error: %d\n", ret);
566 } else if (rsp.hdr.err > 0) {
567 dev_warn(&dev->pdev->dev,
568 "cannot modify queuepair, error: %d\n", rsp.hdr.err);
569 ret = -EINVAL;
570 }
571
572 if (ret == 0 && next_state == IB_QPS_RESET)
573 pvrdma_reset_qp(qp);
574
575out:
576 mutex_unlock(&qp->mutex);
577
578 return ret;
579}
580
581static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n)
582{
583 return pvrdma_page_dir_get_ptr(&qp->pdir,
584 qp->sq.offset + n * qp->sq.wqe_size);
585}
586
587static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n)
588{
589 return pvrdma_page_dir_get_ptr(&qp->pdir,
590 qp->rq.offset + n * qp->rq.wqe_size);
591}
592
593static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr,
594 const struct ib_reg_wr *wr)
595{
596 struct pvrdma_user_mr *mr = to_vmr(wr->mr);
597
598 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova;
599 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma;
600 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift;
601 wqe_hdr->wr.fast_reg.page_list_len = mr->npages;
602 wqe_hdr->wr.fast_reg.length = mr->ibmr.length;
603 wqe_hdr->wr.fast_reg.access_flags = wr->access;
604 wqe_hdr->wr.fast_reg.rkey = wr->key;
605
606 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages,
607 mr->npages);
608}
609
610
611
612
613
614
615
616
617
618int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
619 const struct ib_send_wr **bad_wr)
620{
621 struct pvrdma_qp *qp = to_vqp(ibqp);
622 struct pvrdma_dev *dev = to_vdev(ibqp->device);
623 unsigned long flags;
624 struct pvrdma_sq_wqe_hdr *wqe_hdr;
625 struct pvrdma_sge *sge;
626 int i, ret;
627
628
629
630
631
632 if (qp->state < IB_QPS_RTS) {
633 *bad_wr = wr;
634 return -EINVAL;
635 }
636
637 spin_lock_irqsave(&qp->sq.lock, flags);
638
639 while (wr) {
640 unsigned int tail = 0;
641
642 if (unlikely(!pvrdma_idx_ring_has_space(
643 qp->sq.ring, qp->sq.wqe_cnt, &tail))) {
644 dev_warn_ratelimited(&dev->pdev->dev,
645 "send queue is full\n");
646 *bad_wr = wr;
647 ret = -ENOMEM;
648 goto out;
649 }
650
651 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) {
652 dev_warn_ratelimited(&dev->pdev->dev,
653 "send SGE overflow\n");
654 *bad_wr = wr;
655 ret = -EINVAL;
656 goto out;
657 }
658
659 if (unlikely(wr->opcode < 0)) {
660 dev_warn_ratelimited(&dev->pdev->dev,
661 "invalid send opcode\n");
662 *bad_wr = wr;
663 ret = -EINVAL;
664 goto out;
665 }
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685 if (qp->ibqp.qp_type != IB_QPT_UD &&
686 qp->ibqp.qp_type != IB_QPT_RC &&
687 wr->opcode != IB_WR_SEND) {
688 dev_warn_ratelimited(&dev->pdev->dev,
689 "unsupported queuepair type\n");
690 *bad_wr = wr;
691 ret = -EINVAL;
692 goto out;
693 } else if (qp->ibqp.qp_type == IB_QPT_UD ||
694 qp->ibqp.qp_type == IB_QPT_GSI) {
695 if (wr->opcode != IB_WR_SEND &&
696 wr->opcode != IB_WR_SEND_WITH_IMM) {
697 dev_warn_ratelimited(&dev->pdev->dev,
698 "invalid send opcode\n");
699 *bad_wr = wr;
700 ret = -EINVAL;
701 goto out;
702 }
703 }
704
705 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail);
706 memset(wqe_hdr, 0, sizeof(*wqe_hdr));
707 wqe_hdr->wr_id = wr->wr_id;
708 wqe_hdr->num_sge = wr->num_sge;
709 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode);
710 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags);
711 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
712 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
713 wqe_hdr->ex.imm_data = wr->ex.imm_data;
714
715 if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) {
716 *bad_wr = wr;
717 ret = -EINVAL;
718 goto out;
719 }
720
721 switch (qp->ibqp.qp_type) {
722 case IB_QPT_GSI:
723 case IB_QPT_UD:
724 if (unlikely(!ud_wr(wr)->ah)) {
725 dev_warn_ratelimited(&dev->pdev->dev,
726 "invalid address handle\n");
727 *bad_wr = wr;
728 ret = -EINVAL;
729 goto out;
730 }
731
732
733
734
735
736 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn;
737 wqe_hdr->wr.ud.remote_qkey =
738 ud_wr(wr)->remote_qkey & 0x80000000 ?
739 qp->qkey : ud_wr(wr)->remote_qkey;
740 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av;
741
742 break;
743 case IB_QPT_RC:
744 switch (wr->opcode) {
745 case IB_WR_RDMA_READ:
746 case IB_WR_RDMA_WRITE:
747 case IB_WR_RDMA_WRITE_WITH_IMM:
748 wqe_hdr->wr.rdma.remote_addr =
749 rdma_wr(wr)->remote_addr;
750 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey;
751 break;
752 case IB_WR_LOCAL_INV:
753 case IB_WR_SEND_WITH_INV:
754 wqe_hdr->ex.invalidate_rkey =
755 wr->ex.invalidate_rkey;
756 break;
757 case IB_WR_ATOMIC_CMP_AND_SWP:
758 case IB_WR_ATOMIC_FETCH_AND_ADD:
759 wqe_hdr->wr.atomic.remote_addr =
760 atomic_wr(wr)->remote_addr;
761 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey;
762 wqe_hdr->wr.atomic.compare_add =
763 atomic_wr(wr)->compare_add;
764 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP)
765 wqe_hdr->wr.atomic.swap =
766 atomic_wr(wr)->swap;
767 break;
768 case IB_WR_REG_MR:
769 ret = set_reg_seg(wqe_hdr, reg_wr(wr));
770 if (ret < 0) {
771 dev_warn_ratelimited(&dev->pdev->dev,
772 "Failed to set fast register work request\n");
773 *bad_wr = wr;
774 goto out;
775 }
776 break;
777 default:
778 break;
779 }
780
781 break;
782 default:
783 dev_warn_ratelimited(&dev->pdev->dev,
784 "invalid queuepair type\n");
785 ret = -EINVAL;
786 *bad_wr = wr;
787 goto out;
788 }
789
790 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
791 for (i = 0; i < wr->num_sge; i++) {
792
793 sge->addr = wr->sg_list[i].addr;
794 sge->length = wr->sg_list[i].length;
795 sge->lkey = wr->sg_list[i].lkey;
796 sge++;
797 }
798
799
800 smp_wmb();
801
802
803 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail,
804 qp->sq.wqe_cnt);
805
806 wr = wr->next;
807 }
808
809 ret = 0;
810
811out:
812 spin_unlock_irqrestore(&qp->sq.lock, flags);
813
814 if (!ret)
815 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle);
816
817 return ret;
818}
819
820
821
822
823
824
825
826
827
828int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
829 const struct ib_recv_wr **bad_wr)
830{
831 struct pvrdma_dev *dev = to_vdev(ibqp->device);
832 unsigned long flags;
833 struct pvrdma_qp *qp = to_vqp(ibqp);
834 struct pvrdma_rq_wqe_hdr *wqe_hdr;
835 struct pvrdma_sge *sge;
836 int ret = 0;
837 int i;
838
839
840
841
842
843 if (qp->state == IB_QPS_RESET) {
844 *bad_wr = wr;
845 return -EINVAL;
846 }
847
848 if (qp->srq) {
849 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n");
850 *bad_wr = wr;
851 return -EINVAL;
852 }
853
854 spin_lock_irqsave(&qp->rq.lock, flags);
855
856 while (wr) {
857 unsigned int tail = 0;
858
859 if (unlikely(wr->num_sge > qp->rq.max_sg ||
860 wr->num_sge < 0)) {
861 ret = -EINVAL;
862 *bad_wr = wr;
863 dev_warn_ratelimited(&dev->pdev->dev,
864 "recv SGE overflow\n");
865 goto out;
866 }
867
868 if (unlikely(!pvrdma_idx_ring_has_space(
869 qp->rq.ring, qp->rq.wqe_cnt, &tail))) {
870 ret = -ENOMEM;
871 *bad_wr = wr;
872 dev_warn_ratelimited(&dev->pdev->dev,
873 "recv queue full\n");
874 goto out;
875 }
876
877 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail);
878 wqe_hdr->wr_id = wr->wr_id;
879 wqe_hdr->num_sge = wr->num_sge;
880 wqe_hdr->total_len = 0;
881
882 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
883 for (i = 0; i < wr->num_sge; i++) {
884 sge->addr = wr->sg_list[i].addr;
885 sge->length = wr->sg_list[i].length;
886 sge->lkey = wr->sg_list[i].lkey;
887 sge++;
888 }
889
890
891 smp_wmb();
892
893
894 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail,
895 qp->rq.wqe_cnt);
896
897 wr = wr->next;
898 }
899
900 spin_unlock_irqrestore(&qp->rq.lock, flags);
901
902 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle);
903
904 return ret;
905
906out:
907 spin_unlock_irqrestore(&qp->rq.lock, flags);
908
909 return ret;
910}
911
912
913
914
915
916
917
918
919
920
921int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
922 int attr_mask, struct ib_qp_init_attr *init_attr)
923{
924 struct pvrdma_dev *dev = to_vdev(ibqp->device);
925 struct pvrdma_qp *qp = to_vqp(ibqp);
926 union pvrdma_cmd_req req;
927 union pvrdma_cmd_resp rsp;
928 struct pvrdma_cmd_query_qp *cmd = &req.query_qp;
929 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp;
930 int ret = 0;
931
932 mutex_lock(&qp->mutex);
933
934 if (qp->state == IB_QPS_RESET) {
935 attr->qp_state = IB_QPS_RESET;
936 goto out;
937 }
938
939 memset(cmd, 0, sizeof(*cmd));
940 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP;
941 cmd->qp_handle = qp->qp_handle;
942 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
943
944 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP);
945 if (ret < 0) {
946 dev_warn(&dev->pdev->dev,
947 "could not query queuepair, error: %d\n", ret);
948 goto out;
949 }
950
951 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state);
952 attr->cur_qp_state =
953 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state);
954 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu);
955 attr->path_mig_state =
956 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state);
957 attr->qkey = resp->attrs.qkey;
958 attr->rq_psn = resp->attrs.rq_psn;
959 attr->sq_psn = resp->attrs.sq_psn;
960 attr->dest_qp_num = resp->attrs.dest_qp_num;
961 attr->qp_access_flags =
962 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags);
963 attr->pkey_index = resp->attrs.pkey_index;
964 attr->alt_pkey_index = resp->attrs.alt_pkey_index;
965 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify;
966 attr->sq_draining = resp->attrs.sq_draining;
967 attr->max_rd_atomic = resp->attrs.max_rd_atomic;
968 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic;
969 attr->min_rnr_timer = resp->attrs.min_rnr_timer;
970 attr->port_num = resp->attrs.port_num;
971 attr->timeout = resp->attrs.timeout;
972 attr->retry_cnt = resp->attrs.retry_cnt;
973 attr->rnr_retry = resp->attrs.rnr_retry;
974 attr->alt_port_num = resp->attrs.alt_port_num;
975 attr->alt_timeout = resp->attrs.alt_timeout;
976 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap);
977 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr);
978 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr);
979
980 qp->state = attr->qp_state;
981
982 ret = 0;
983
984out:
985 attr->cur_qp_state = attr->qp_state;
986
987 init_attr->event_handler = qp->ibqp.event_handler;
988 init_attr->qp_context = qp->ibqp.qp_context;
989 init_attr->send_cq = qp->ibqp.send_cq;
990 init_attr->recv_cq = qp->ibqp.recv_cq;
991 init_attr->srq = qp->ibqp.srq;
992 init_attr->xrcd = NULL;
993 init_attr->cap = attr->cap;
994 init_attr->sq_sig_type = 0;
995 init_attr->qp_type = qp->ibqp.qp_type;
996 init_attr->create_flags = 0;
997 init_attr->port_num = qp->port;
998
999 mutex_unlock(&qp->mutex);
1000 return ret;
1001}
1002
