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#include <linux/module.h>
34#include <linux/init.h>
35#include <linux/slab.h>
36#include <linux/errno.h>
37
38#include <rdma/ib_user_verbs.h>
39#include <rdma/ib_addr.h>
40#include <rdma/uverbs_ioctl.h>
41
42#include "usnic_abi.h"
43#include "usnic_ib.h"
44#include "usnic_common_util.h"
45#include "usnic_ib_qp_grp.h"
46#include "usnic_ib_verbs.h"
47#include "usnic_fwd.h"
48#include "usnic_log.h"
49#include "usnic_uiom.h"
50#include "usnic_transport.h"
51
52#define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
53
54const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = {
55 {
56 .resources = {
57 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
58 },
59 },
60 {
61 .resources = {
62 {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,},
63 {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,},
64 {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,},
65 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
66 },
67 },
68 {
69 .resources = {
70 {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,},
71 {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,},
72 {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,},
73 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
74 },
75 },
76};
77
78static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
79{
80 *fw_ver = *((u64 *)fw_ver_str);
81}
82
83static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
84 struct ib_udata *udata)
85{
86 struct usnic_ib_dev *us_ibdev;
87 struct usnic_ib_create_qp_resp resp;
88 struct pci_dev *pdev;
89 struct vnic_dev_bar *bar;
90 struct usnic_vnic_res_chunk *chunk;
91 struct usnic_ib_qp_grp_flow *default_flow;
92 int i, err;
93
94 memset(&resp, 0, sizeof(resp));
95
96 us_ibdev = qp_grp->vf->pf;
97 pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
98 if (!pdev) {
99 usnic_err("Failed to get pdev of qp_grp %d\n",
100 qp_grp->grp_id);
101 return -EFAULT;
102 }
103
104 bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
105 if (!bar) {
106 usnic_err("Failed to get bar0 of qp_grp %d vf %s",
107 qp_grp->grp_id, pci_name(pdev));
108 return -EFAULT;
109 }
110
111 resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
112 resp.bar_bus_addr = bar->bus_addr;
113 resp.bar_len = bar->len;
114
115 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
116 if (IS_ERR(chunk)) {
117 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
118 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
119 qp_grp->grp_id,
120 PTR_ERR(chunk));
121 return PTR_ERR(chunk);
122 }
123
124 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
125 resp.rq_cnt = chunk->cnt;
126 for (i = 0; i < chunk->cnt; i++)
127 resp.rq_idx[i] = chunk->res[i]->vnic_idx;
128
129 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
130 if (IS_ERR(chunk)) {
131 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
132 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
133 qp_grp->grp_id,
134 PTR_ERR(chunk));
135 return PTR_ERR(chunk);
136 }
137
138 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
139 resp.wq_cnt = chunk->cnt;
140 for (i = 0; i < chunk->cnt; i++)
141 resp.wq_idx[i] = chunk->res[i]->vnic_idx;
142
143 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
144 if (IS_ERR(chunk)) {
145 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
146 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
147 qp_grp->grp_id,
148 PTR_ERR(chunk));
149 return PTR_ERR(chunk);
150 }
151
152 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
153 resp.cq_cnt = chunk->cnt;
154 for (i = 0; i < chunk->cnt; i++)
155 resp.cq_idx[i] = chunk->res[i]->vnic_idx;
156
157 default_flow = list_first_entry(&qp_grp->flows_lst,
158 struct usnic_ib_qp_grp_flow, link);
159 resp.transport = default_flow->trans_type;
160
161 err = ib_copy_to_udata(udata, &resp, sizeof(resp));
162 if (err) {
163 usnic_err("Failed to copy udata for %s",
164 dev_name(&us_ibdev->ib_dev.dev));
165 return err;
166 }
167
168 return 0;
169}
170
171static int
172find_free_vf_and_create_qp_grp(struct ib_qp *qp,
173 struct usnic_transport_spec *trans_spec,
174 struct usnic_vnic_res_spec *res_spec)
175{
176 struct usnic_ib_dev *us_ibdev = to_usdev(qp->device);
177 struct usnic_ib_pd *pd = to_upd(qp->pd);
178 struct usnic_ib_vf *vf;
179 struct usnic_vnic *vnic;
180 struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(qp);
181 struct device *dev, **dev_list;
182 int i, ret;
183
184 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
185
186 if (list_empty(&us_ibdev->vf_dev_list)) {
187 usnic_info("No vfs to allocate\n");
188 return -ENOMEM;
189 }
190
191 if (usnic_ib_share_vf) {
192
193 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
194 if (IS_ERR(dev_list))
195 return PTR_ERR(dev_list);
196 for (i = 0; dev_list[i]; i++) {
197 dev = dev_list[i];
198 vf = dev_get_drvdata(dev);
199 mutex_lock(&vf->lock);
200 vnic = vf->vnic;
201 if (!usnic_vnic_check_room(vnic, res_spec)) {
202 usnic_dbg("Found used vnic %s from %s\n",
203 dev_name(&us_ibdev->ib_dev.dev),
204 pci_name(usnic_vnic_get_pdev(
205 vnic)));
206 ret = usnic_ib_qp_grp_create(qp_grp,
207 us_ibdev->ufdev,
208 vf, pd, res_spec,
209 trans_spec);
210
211 mutex_unlock(&vf->lock);
212 goto qp_grp_check;
213 }
214 mutex_unlock(&vf->lock);
215
216 }
217 usnic_uiom_free_dev_list(dev_list);
218 dev_list = NULL;
219 }
220
221
222 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
223 mutex_lock(&vf->lock);
224 vnic = vf->vnic;
225 if (vf->qp_grp_ref_cnt == 0 &&
226 usnic_vnic_check_room(vnic, res_spec) == 0) {
227 ret = usnic_ib_qp_grp_create(qp_grp, us_ibdev->ufdev,
228 vf, pd, res_spec,
229 trans_spec);
230
231 mutex_unlock(&vf->lock);
232 goto qp_grp_check;
233 }
234 mutex_unlock(&vf->lock);
235 }
236
237 usnic_info("No free qp grp found on %s\n",
238 dev_name(&us_ibdev->ib_dev.dev));
239 return -ENOMEM;
240
241qp_grp_check:
242 if (ret) {
243 usnic_err("Failed to allocate qp_grp\n");
244 if (usnic_ib_share_vf)
245 usnic_uiom_free_dev_list(dev_list);
246 }
247 return ret;
248}
249
250static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
251{
252 struct usnic_ib_vf *vf = qp_grp->vf;
253
254 WARN_ON(qp_grp->state != IB_QPS_RESET);
255
256 mutex_lock(&vf->lock);
257 usnic_ib_qp_grp_destroy(qp_grp);
258 mutex_unlock(&vf->lock);
259}
260
261static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
262{
263 if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
264 cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
265 return -EINVAL;
266
267 return 0;
268}
269
270
271
272enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
273 u32 port_num)
274{
275 return IB_LINK_LAYER_ETHERNET;
276}
277
278int usnic_ib_query_device(struct ib_device *ibdev,
279 struct ib_device_attr *props,
280 struct ib_udata *uhw)
281{
282 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
283 union ib_gid gid;
284 struct ethtool_drvinfo info;
285 int qp_per_vf;
286
287 usnic_dbg("\n");
288 if (uhw->inlen || uhw->outlen)
289 return -EINVAL;
290
291 mutex_lock(&us_ibdev->usdev_lock);
292 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
293 memset(props, 0, sizeof(*props));
294 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
295 &gid.raw[0]);
296 memcpy(&props->sys_image_guid, &gid.global.interface_id,
297 sizeof(gid.global.interface_id));
298 usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
299 props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
300 props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
301 props->vendor_id = PCI_VENDOR_ID_CISCO;
302 props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
303 props->hw_ver = us_ibdev->pdev->subsystem_device;
304 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
305 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
306 props->max_qp = qp_per_vf *
307 kref_read(&us_ibdev->vf_cnt);
308 props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
309 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
310 props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
311 kref_read(&us_ibdev->vf_cnt);
312 props->max_pd = USNIC_UIOM_MAX_PD_CNT;
313 props->max_mr = USNIC_UIOM_MAX_MR_CNT;
314 props->local_ca_ack_delay = 0;
315 props->max_pkeys = 0;
316 props->atomic_cap = IB_ATOMIC_NONE;
317 props->masked_atomic_cap = props->atomic_cap;
318 props->max_qp_rd_atom = 0;
319 props->max_qp_init_rd_atom = 0;
320 props->max_res_rd_atom = 0;
321 props->max_srq = 0;
322 props->max_srq_wr = 0;
323 props->max_srq_sge = 0;
324 props->max_fast_reg_page_list_len = 0;
325 props->max_mcast_grp = 0;
326 props->max_mcast_qp_attach = 0;
327 props->max_total_mcast_qp_attach = 0;
328
329
330 mutex_unlock(&us_ibdev->usdev_lock);
331
332 return 0;
333}
334
335int usnic_ib_query_port(struct ib_device *ibdev, u32 port,
336 struct ib_port_attr *props)
337{
338 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
339
340 usnic_dbg("\n");
341
342 if (ib_get_eth_speed(ibdev, port, &props->active_speed,
343 &props->active_width))
344 return -EINVAL;
345
346
347
348
349
350
351 mutex_lock(&us_ibdev->usdev_lock);
352
353
354 props->lid = 0;
355 props->lmc = 1;
356 props->sm_lid = 0;
357 props->sm_sl = 0;
358
359 if (!us_ibdev->ufdev->link_up) {
360 props->state = IB_PORT_DOWN;
361 props->phys_state = IB_PORT_PHYS_STATE_DISABLED;
362 } else if (!us_ibdev->ufdev->inaddr) {
363 props->state = IB_PORT_INIT;
364 props->phys_state =
365 IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING;
366 } else {
367 props->state = IB_PORT_ACTIVE;
368 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
369 }
370
371 props->port_cap_flags = 0;
372 props->gid_tbl_len = 1;
373 props->bad_pkey_cntr = 0;
374 props->qkey_viol_cntr = 0;
375 props->max_mtu = IB_MTU_4096;
376 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
377
378 props->max_msg_sz = us_ibdev->ufdev->mtu;
379 props->max_vl_num = 1;
380 mutex_unlock(&us_ibdev->usdev_lock);
381
382 return 0;
383}
384
385int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
386 int qp_attr_mask,
387 struct ib_qp_init_attr *qp_init_attr)
388{
389 struct usnic_ib_qp_grp *qp_grp;
390 struct usnic_ib_vf *vf;
391 int err;
392
393 usnic_dbg("\n");
394
395 memset(qp_attr, 0, sizeof(*qp_attr));
396 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
397
398 qp_grp = to_uqp_grp(qp);
399 vf = qp_grp->vf;
400 mutex_lock(&vf->pf->usdev_lock);
401 usnic_dbg("\n");
402 qp_attr->qp_state = qp_grp->state;
403 qp_attr->cur_qp_state = qp_grp->state;
404
405 switch (qp_grp->ibqp.qp_type) {
406 case IB_QPT_UD:
407 qp_attr->qkey = 0;
408 break;
409 default:
410 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
411 err = -EINVAL;
412 goto err_out;
413 }
414
415 mutex_unlock(&vf->pf->usdev_lock);
416 return 0;
417
418err_out:
419 mutex_unlock(&vf->pf->usdev_lock);
420 return err;
421}
422
423int usnic_ib_query_gid(struct ib_device *ibdev, u32 port, int index,
424 union ib_gid *gid)
425{
426
427 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
428 usnic_dbg("\n");
429
430 if (index > 1)
431 return -EINVAL;
432
433 mutex_lock(&us_ibdev->usdev_lock);
434 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
435 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
436 &gid->raw[0]);
437 mutex_unlock(&us_ibdev->usdev_lock);
438
439 return 0;
440}
441
442int usnic_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
443{
444 struct usnic_ib_pd *pd = to_upd(ibpd);
445 void *umem_pd;
446
447 umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
448 if (IS_ERR_OR_NULL(umem_pd)) {
449 return umem_pd ? PTR_ERR(umem_pd) : -ENOMEM;
450 }
451
452 return 0;
453}
454
455int usnic_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
456{
457 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
458 return 0;
459}
460
461int usnic_ib_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
462 struct ib_udata *udata)
463{
464 int err;
465 struct usnic_ib_dev *us_ibdev;
466 struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(ibqp);
467 struct usnic_ib_ucontext *ucontext = rdma_udata_to_drv_context(
468 udata, struct usnic_ib_ucontext, ibucontext);
469 int cq_cnt;
470 struct usnic_vnic_res_spec res_spec;
471 struct usnic_ib_create_qp_cmd cmd;
472 struct usnic_transport_spec trans_spec;
473
474 usnic_dbg("\n");
475
476 us_ibdev = to_usdev(ibqp->device);
477
478 if (init_attr->create_flags)
479 return -EOPNOTSUPP;
480
481 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
482 if (err) {
483 usnic_err("%s: cannot copy udata for create_qp\n",
484 dev_name(&us_ibdev->ib_dev.dev));
485 return -EINVAL;
486 }
487
488 err = create_qp_validate_user_data(cmd);
489 if (err) {
490 usnic_err("%s: Failed to validate user data\n",
491 dev_name(&us_ibdev->ib_dev.dev));
492 return -EINVAL;
493 }
494
495 if (init_attr->qp_type != IB_QPT_UD) {
496 usnic_err("%s asked to make a non-UD QP: %d\n",
497 dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type);
498 return -EOPNOTSUPP;
499 }
500
501 trans_spec = cmd.spec;
502 mutex_lock(&us_ibdev->usdev_lock);
503 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
504 res_spec = min_transport_spec[trans_spec.trans_type];
505 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
506 err = find_free_vf_and_create_qp_grp(ibqp, &trans_spec, &res_spec);
507 if (err)
508 goto out_release_mutex;
509
510 err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
511 if (err) {
512 err = -EBUSY;
513 goto out_release_qp_grp;
514 }
515
516 qp_grp->ctx = ucontext;
517 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
518 usnic_ib_log_vf(qp_grp->vf);
519 mutex_unlock(&us_ibdev->usdev_lock);
520 return 0;
521
522out_release_qp_grp:
523 qp_grp_destroy(qp_grp);
524out_release_mutex:
525 mutex_unlock(&us_ibdev->usdev_lock);
526 return err;
527}
528
529int usnic_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
530{
531 struct usnic_ib_qp_grp *qp_grp;
532 struct usnic_ib_vf *vf;
533
534 usnic_dbg("\n");
535
536 qp_grp = to_uqp_grp(qp);
537 vf = qp_grp->vf;
538 mutex_lock(&vf->pf->usdev_lock);
539 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
540 usnic_err("Failed to move qp grp %u to reset\n",
541 qp_grp->grp_id);
542 }
543
544 list_del(&qp_grp->link);
545 qp_grp_destroy(qp_grp);
546 mutex_unlock(&vf->pf->usdev_lock);
547
548 return 0;
549}
550
551int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
552 int attr_mask, struct ib_udata *udata)
553{
554 struct usnic_ib_qp_grp *qp_grp;
555 int status;
556 usnic_dbg("\n");
557
558 if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
559 return -EOPNOTSUPP;
560
561 qp_grp = to_uqp_grp(ibqp);
562
563 mutex_lock(&qp_grp->vf->pf->usdev_lock);
564 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
565
566 status = -EINVAL;
567 goto out_unlock;
568 }
569 if (attr_mask & IB_QP_STATE) {
570 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
571 } else {
572 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
573 status = -EINVAL;
574 }
575
576out_unlock:
577 mutex_unlock(&qp_grp->vf->pf->usdev_lock);
578 return status;
579}
580
581int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
582 struct ib_udata *udata)
583{
584 if (attr->flags)
585 return -EOPNOTSUPP;
586
587 return 0;
588}
589
590int usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
591{
592 return 0;
593}
594
595struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
596 u64 virt_addr, int access_flags,
597 struct ib_udata *udata)
598{
599 struct usnic_ib_mr *mr;
600 int err;
601
602 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
603 virt_addr, length);
604
605 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
606 if (!mr)
607 return ERR_PTR(-ENOMEM);
608
609 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
610 access_flags, 0);
611 if (IS_ERR_OR_NULL(mr->umem)) {
612 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
613 goto err_free;
614 }
615
616 mr->ibmr.lkey = mr->ibmr.rkey = 0;
617 return &mr->ibmr;
618
619err_free:
620 kfree(mr);
621 return ERR_PTR(err);
622}
623
624int usnic_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
625{
626 struct usnic_ib_mr *mr = to_umr(ibmr);
627
628 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
629
630 usnic_uiom_reg_release(mr->umem);
631 kfree(mr);
632 return 0;
633}
634
635int usnic_ib_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
636{
637 struct ib_device *ibdev = uctx->device;
638 struct usnic_ib_ucontext *context = to_ucontext(uctx);
639 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
640 usnic_dbg("\n");
641
642 INIT_LIST_HEAD(&context->qp_grp_list);
643 mutex_lock(&us_ibdev->usdev_lock);
644 list_add_tail(&context->link, &us_ibdev->ctx_list);
645 mutex_unlock(&us_ibdev->usdev_lock);
646
647 return 0;
648}
649
650void usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
651{
652 struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
653 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
654 usnic_dbg("\n");
655
656 mutex_lock(&us_ibdev->usdev_lock);
657 WARN_ON_ONCE(!list_empty(&context->qp_grp_list));
658 list_del(&context->link);
659 mutex_unlock(&us_ibdev->usdev_lock);
660}
661
662int usnic_ib_mmap(struct ib_ucontext *context,
663 struct vm_area_struct *vma)
664{
665 struct usnic_ib_ucontext *uctx = to_ucontext(context);
666 struct usnic_ib_dev *us_ibdev;
667 struct usnic_ib_qp_grp *qp_grp;
668 struct usnic_ib_vf *vf;
669 struct vnic_dev_bar *bar;
670 dma_addr_t bus_addr;
671 unsigned int len;
672 unsigned int vfid;
673
674 usnic_dbg("\n");
675
676 us_ibdev = to_usdev(context->device);
677 vma->vm_flags |= VM_IO;
678 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
679 vfid = vma->vm_pgoff;
680 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
681 vma->vm_pgoff, PAGE_SHIFT, vfid);
682
683 mutex_lock(&us_ibdev->usdev_lock);
684 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
685 vf = qp_grp->vf;
686 if (usnic_vnic_get_index(vf->vnic) == vfid) {
687 bar = usnic_vnic_get_bar(vf->vnic, 0);
688 if ((vma->vm_end - vma->vm_start) != bar->len) {
689 usnic_err("Bar0 Len %lu - Request map %lu\n",
690 bar->len,
691 vma->vm_end - vma->vm_start);
692 mutex_unlock(&us_ibdev->usdev_lock);
693 return -EINVAL;
694 }
695 bus_addr = bar->bus_addr;
696 len = bar->len;
697 usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
698 &bus_addr, bar->vaddr, bar->len);
699 mutex_unlock(&us_ibdev->usdev_lock);
700
701 return remap_pfn_range(vma,
702 vma->vm_start,
703 bus_addr >> PAGE_SHIFT,
704 len, vma->vm_page_prot);
705 }
706 }
707
708 mutex_unlock(&us_ibdev->usdev_lock);
709 usnic_err("No VF %u found\n", vfid);
710 return -EINVAL;
711}
712
713
