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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
41#include "usnic_abi.h"
42#include "usnic_ib.h"
43#include "usnic_common_util.h"
44#include "usnic_ib_qp_grp.h"
45#include "usnic_ib_verbs.h"
46#include "usnic_fwd.h"
47#include "usnic_log.h"
48#include "usnic_uiom.h"
49#include "usnic_transport.h"
50
51#define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
52
53const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = {
54 {
55 .resources = {
56 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
57 },
58 },
59 {
60 .resources = {
61 {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,},
62 {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,},
63 {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,},
64 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
65 },
66 },
67 {
68 .resources = {
69 {.type = USNIC_VNIC_RES_TYPE_WQ, .cnt = 1,},
70 {.type = USNIC_VNIC_RES_TYPE_RQ, .cnt = 1,},
71 {.type = USNIC_VNIC_RES_TYPE_CQ, .cnt = 1,},
72 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
73 },
74 },
75};
76
77static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
78{
79 *fw_ver = *((u64 *)fw_ver_str);
80}
81
82static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
83 struct ib_udata *udata)
84{
85 struct usnic_ib_dev *us_ibdev;
86 struct usnic_ib_create_qp_resp resp;
87 struct pci_dev *pdev;
88 struct vnic_dev_bar *bar;
89 struct usnic_vnic_res_chunk *chunk;
90 struct usnic_ib_qp_grp_flow *default_flow;
91 int i, err;
92
93 memset(&resp, 0, sizeof(resp));
94
95 us_ibdev = qp_grp->vf->pf;
96 pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
97 if (!pdev) {
98 usnic_err("Failed to get pdev of qp_grp %d\n",
99 qp_grp->grp_id);
100 return -EFAULT;
101 }
102
103 bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
104 if (!bar) {
105 usnic_err("Failed to get bar0 of qp_grp %d vf %s",
106 qp_grp->grp_id, pci_name(pdev));
107 return -EFAULT;
108 }
109
110 resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
111 resp.bar_bus_addr = bar->bus_addr;
112 resp.bar_len = bar->len;
113
114 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
115 if (IS_ERR(chunk)) {
116 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
117 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
118 qp_grp->grp_id,
119 PTR_ERR(chunk));
120 return PTR_ERR(chunk);
121 }
122
123 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
124 resp.rq_cnt = chunk->cnt;
125 for (i = 0; i < chunk->cnt; i++)
126 resp.rq_idx[i] = chunk->res[i]->vnic_idx;
127
128 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
129 if (IS_ERR(chunk)) {
130 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
131 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
132 qp_grp->grp_id,
133 PTR_ERR(chunk));
134 return PTR_ERR(chunk);
135 }
136
137 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
138 resp.wq_cnt = chunk->cnt;
139 for (i = 0; i < chunk->cnt; i++)
140 resp.wq_idx[i] = chunk->res[i]->vnic_idx;
141
142 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
143 if (IS_ERR(chunk)) {
144 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
145 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
146 qp_grp->grp_id,
147 PTR_ERR(chunk));
148 return PTR_ERR(chunk);
149 }
150
151 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
152 resp.cq_cnt = chunk->cnt;
153 for (i = 0; i < chunk->cnt; i++)
154 resp.cq_idx[i] = chunk->res[i]->vnic_idx;
155
156 default_flow = list_first_entry(&qp_grp->flows_lst,
157 struct usnic_ib_qp_grp_flow, link);
158 resp.transport = default_flow->trans_type;
159
160 err = ib_copy_to_udata(udata, &resp, sizeof(resp));
161 if (err) {
162 usnic_err("Failed to copy udata for %s", us_ibdev->ib_dev.name);
163 return err;
164 }
165
166 return 0;
167}
168
169static struct usnic_ib_qp_grp*
170find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
171 struct usnic_ib_pd *pd,
172 struct usnic_transport_spec *trans_spec,
173 struct usnic_vnic_res_spec *res_spec)
174{
175 struct usnic_ib_vf *vf;
176 struct usnic_vnic *vnic;
177 struct usnic_ib_qp_grp *qp_grp;
178 struct device *dev, **dev_list;
179 int i;
180
181 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
182
183 if (list_empty(&us_ibdev->vf_dev_list)) {
184 usnic_info("No vfs to allocate\n");
185 return NULL;
186 }
187
188 if (usnic_ib_share_vf) {
189
190 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
191 if (IS_ERR(dev_list))
192 return ERR_CAST(dev_list);
193 for (i = 0; dev_list[i]; i++) {
194 dev = dev_list[i];
195 vf = pci_get_drvdata(to_pci_dev(dev));
196 spin_lock(&vf->lock);
197 vnic = vf->vnic;
198 if (!usnic_vnic_check_room(vnic, res_spec)) {
199 usnic_dbg("Found used vnic %s from %s\n",
200 us_ibdev->ib_dev.name,
201 pci_name(usnic_vnic_get_pdev(
202 vnic)));
203 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev,
204 vf, pd,
205 res_spec,
206 trans_spec);
207
208 spin_unlock(&vf->lock);
209 goto qp_grp_check;
210 }
211 spin_unlock(&vf->lock);
212
213 }
214 usnic_uiom_free_dev_list(dev_list);
215 }
216
217
218 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
219 spin_lock(&vf->lock);
220 vnic = vf->vnic;
221 if (vf->qp_grp_ref_cnt == 0 &&
222 usnic_vnic_check_room(vnic, res_spec) == 0) {
223 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf,
224 pd, res_spec,
225 trans_spec);
226
227 spin_unlock(&vf->lock);
228 goto qp_grp_check;
229 }
230 spin_unlock(&vf->lock);
231 }
232
233 usnic_info("No free qp grp found on %s\n", us_ibdev->ib_dev.name);
234 return ERR_PTR(-ENOMEM);
235
236qp_grp_check:
237 if (IS_ERR_OR_NULL(qp_grp)) {
238 usnic_err("Failed to allocate qp_grp\n");
239 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
240 }
241 return qp_grp;
242}
243
244static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
245{
246 struct usnic_ib_vf *vf = qp_grp->vf;
247
248 WARN_ON(qp_grp->state != IB_QPS_RESET);
249
250 spin_lock(&vf->lock);
251 usnic_ib_qp_grp_destroy(qp_grp);
252 spin_unlock(&vf->lock);
253}
254
255static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
256{
257 if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
258 cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
259 return -EINVAL;
260
261 return 0;
262}
263
264
265
266enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
267 u8 port_num)
268{
269 return IB_LINK_LAYER_ETHERNET;
270}
271
272int usnic_ib_query_device(struct ib_device *ibdev,
273 struct ib_device_attr *props,
274 struct ib_udata *uhw)
275{
276 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
277 union ib_gid gid;
278 struct ethtool_drvinfo info;
279 int qp_per_vf;
280
281 usnic_dbg("\n");
282 if (uhw->inlen || uhw->outlen)
283 return -EINVAL;
284
285 mutex_lock(&us_ibdev->usdev_lock);
286 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
287 memset(props, 0, sizeof(*props));
288 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
289 &gid.raw[0]);
290 memcpy(&props->sys_image_guid, &gid.global.interface_id,
291 sizeof(gid.global.interface_id));
292 usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
293 props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
294 props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
295 props->vendor_id = PCI_VENDOR_ID_CISCO;
296 props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
297 props->hw_ver = us_ibdev->pdev->subsystem_device;
298 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
299 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
300 props->max_qp = qp_per_vf *
301 kref_read(&us_ibdev->vf_cnt);
302 props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
303 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
304 props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
305 kref_read(&us_ibdev->vf_cnt);
306 props->max_pd = USNIC_UIOM_MAX_PD_CNT;
307 props->max_mr = USNIC_UIOM_MAX_MR_CNT;
308 props->local_ca_ack_delay = 0;
309 props->max_pkeys = 0;
310 props->atomic_cap = IB_ATOMIC_NONE;
311 props->masked_atomic_cap = props->atomic_cap;
312 props->max_qp_rd_atom = 0;
313 props->max_qp_init_rd_atom = 0;
314 props->max_res_rd_atom = 0;
315 props->max_srq = 0;
316 props->max_srq_wr = 0;
317 props->max_srq_sge = 0;
318 props->max_fast_reg_page_list_len = 0;
319 props->max_mcast_grp = 0;
320 props->max_mcast_qp_attach = 0;
321 props->max_total_mcast_qp_attach = 0;
322 props->max_map_per_fmr = 0;
323
324
325 mutex_unlock(&us_ibdev->usdev_lock);
326
327 return 0;
328}
329
330int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
331 struct ib_port_attr *props)
332{
333 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
334
335 usnic_dbg("\n");
336
337 mutex_lock(&us_ibdev->usdev_lock);
338 if (ib_get_eth_speed(ibdev, port, &props->active_speed,
339 &props->active_width)) {
340 mutex_unlock(&us_ibdev->usdev_lock);
341 return -EINVAL;
342 }
343
344
345
346 props->lid = 0;
347 props->lmc = 1;
348 props->sm_lid = 0;
349 props->sm_sl = 0;
350
351 if (!us_ibdev->ufdev->link_up) {
352 props->state = IB_PORT_DOWN;
353 props->phys_state = 3;
354 } else if (!us_ibdev->ufdev->inaddr) {
355 props->state = IB_PORT_INIT;
356 props->phys_state = 4;
357 } else {
358 props->state = IB_PORT_ACTIVE;
359 props->phys_state = 5;
360 }
361
362 props->port_cap_flags = 0;
363 props->gid_tbl_len = 1;
364 props->pkey_tbl_len = 1;
365 props->bad_pkey_cntr = 0;
366 props->qkey_viol_cntr = 0;
367 props->max_mtu = IB_MTU_4096;
368 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
369
370 props->max_msg_sz = us_ibdev->ufdev->mtu;
371 props->max_vl_num = 1;
372 mutex_unlock(&us_ibdev->usdev_lock);
373
374 return 0;
375}
376
377int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
378 int qp_attr_mask,
379 struct ib_qp_init_attr *qp_init_attr)
380{
381 struct usnic_ib_qp_grp *qp_grp;
382 struct usnic_ib_vf *vf;
383 int err;
384
385 usnic_dbg("\n");
386
387 memset(qp_attr, 0, sizeof(*qp_attr));
388 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
389
390 qp_grp = to_uqp_grp(qp);
391 vf = qp_grp->vf;
392 mutex_lock(&vf->pf->usdev_lock);
393 usnic_dbg("\n");
394 qp_attr->qp_state = qp_grp->state;
395 qp_attr->cur_qp_state = qp_grp->state;
396
397 switch (qp_grp->ibqp.qp_type) {
398 case IB_QPT_UD:
399 qp_attr->qkey = 0;
400 break;
401 default:
402 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
403 err = -EINVAL;
404 goto err_out;
405 }
406
407 mutex_unlock(&vf->pf->usdev_lock);
408 return 0;
409
410err_out:
411 mutex_unlock(&vf->pf->usdev_lock);
412 return err;
413}
414
415int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
416 union ib_gid *gid)
417{
418
419 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
420 usnic_dbg("\n");
421
422 if (index > 1)
423 return -EINVAL;
424
425 mutex_lock(&us_ibdev->usdev_lock);
426 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
427 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
428 &gid->raw[0]);
429 mutex_unlock(&us_ibdev->usdev_lock);
430
431 return 0;
432}
433
434struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num)
435{
436 struct usnic_ib_dev *us_ibdev = to_usdev(device);
437
438 if (us_ibdev->netdev)
439 dev_hold(us_ibdev->netdev);
440
441 return us_ibdev->netdev;
442}
443
444int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
445 u16 *pkey)
446{
447 if (index > 1)
448 return -EINVAL;
449
450 *pkey = 0xffff;
451 return 0;
452}
453
454struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
455 struct ib_ucontext *context,
456 struct ib_udata *udata)
457{
458 struct usnic_ib_pd *pd;
459 void *umem_pd;
460
461 usnic_dbg("\n");
462
463 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
464 if (!pd)
465 return ERR_PTR(-ENOMEM);
466
467 umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
468 if (IS_ERR_OR_NULL(umem_pd)) {
469 kfree(pd);
470 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
471 }
472
473 usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
474 pd, context, ibdev->name);
475 return &pd->ibpd;
476}
477
478int usnic_ib_dealloc_pd(struct ib_pd *pd)
479{
480 usnic_info("freeing domain 0x%p\n", pd);
481
482 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
483 kfree(pd);
484 return 0;
485}
486
487struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
488 struct ib_qp_init_attr *init_attr,
489 struct ib_udata *udata)
490{
491 int err;
492 struct usnic_ib_dev *us_ibdev;
493 struct usnic_ib_qp_grp *qp_grp;
494 struct usnic_ib_ucontext *ucontext;
495 int cq_cnt;
496 struct usnic_vnic_res_spec res_spec;
497 struct usnic_ib_create_qp_cmd cmd;
498 struct usnic_transport_spec trans_spec;
499
500 usnic_dbg("\n");
501
502 ucontext = to_uucontext(pd->uobject->context);
503 us_ibdev = to_usdev(pd->device);
504
505 if (init_attr->create_flags)
506 return ERR_PTR(-EINVAL);
507
508 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
509 if (err) {
510 usnic_err("%s: cannot copy udata for create_qp\n",
511 us_ibdev->ib_dev.name);
512 return ERR_PTR(-EINVAL);
513 }
514
515 err = create_qp_validate_user_data(cmd);
516 if (err) {
517 usnic_err("%s: Failed to validate user data\n",
518 us_ibdev->ib_dev.name);
519 return ERR_PTR(-EINVAL);
520 }
521
522 if (init_attr->qp_type != IB_QPT_UD) {
523 usnic_err("%s asked to make a non-UD QP: %d\n",
524 us_ibdev->ib_dev.name, init_attr->qp_type);
525 return ERR_PTR(-EINVAL);
526 }
527
528 trans_spec = cmd.spec;
529 mutex_lock(&us_ibdev->usdev_lock);
530 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
531 res_spec = min_transport_spec[trans_spec.trans_type];
532 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
533 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
534 &trans_spec,
535 &res_spec);
536 if (IS_ERR_OR_NULL(qp_grp)) {
537 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
538 goto out_release_mutex;
539 }
540
541 err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
542 if (err) {
543 err = -EBUSY;
544 goto out_release_qp_grp;
545 }
546
547 qp_grp->ctx = ucontext;
548 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
549 usnic_ib_log_vf(qp_grp->vf);
550 mutex_unlock(&us_ibdev->usdev_lock);
551 return &qp_grp->ibqp;
552
553out_release_qp_grp:
554 qp_grp_destroy(qp_grp);
555out_release_mutex:
556 mutex_unlock(&us_ibdev->usdev_lock);
557 return ERR_PTR(err);
558}
559
560int usnic_ib_destroy_qp(struct ib_qp *qp)
561{
562 struct usnic_ib_qp_grp *qp_grp;
563 struct usnic_ib_vf *vf;
564
565 usnic_dbg("\n");
566
567 qp_grp = to_uqp_grp(qp);
568 vf = qp_grp->vf;
569 mutex_lock(&vf->pf->usdev_lock);
570 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
571 usnic_err("Failed to move qp grp %u to reset\n",
572 qp_grp->grp_id);
573 }
574
575 list_del(&qp_grp->link);
576 qp_grp_destroy(qp_grp);
577 mutex_unlock(&vf->pf->usdev_lock);
578
579 return 0;
580}
581
582int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
583 int attr_mask, struct ib_udata *udata)
584{
585 struct usnic_ib_qp_grp *qp_grp;
586 int status;
587 usnic_dbg("\n");
588
589 qp_grp = to_uqp_grp(ibqp);
590
591 mutex_lock(&qp_grp->vf->pf->usdev_lock);
592 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
593
594 status = -EINVAL;
595 goto out_unlock;
596 }
597 if (attr_mask & IB_QP_STATE) {
598 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
599 } else {
600 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
601 status = -EINVAL;
602 }
603
604out_unlock:
605 mutex_unlock(&qp_grp->vf->pf->usdev_lock);
606 return status;
607}
608
609struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
610 const struct ib_cq_init_attr *attr,
611 struct ib_ucontext *context,
612 struct ib_udata *udata)
613{
614 struct ib_cq *cq;
615
616 usnic_dbg("\n");
617 if (attr->flags)
618 return ERR_PTR(-EINVAL);
619
620 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
621 if (!cq)
622 return ERR_PTR(-EBUSY);
623
624 return cq;
625}
626
627int usnic_ib_destroy_cq(struct ib_cq *cq)
628{
629 usnic_dbg("\n");
630 kfree(cq);
631 return 0;
632}
633
634struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
635 u64 virt_addr, int access_flags,
636 struct ib_udata *udata)
637{
638 struct usnic_ib_mr *mr;
639 int err;
640
641 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
642 virt_addr, length);
643
644 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
645 if (!mr)
646 return ERR_PTR(-ENOMEM);
647
648 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
649 access_flags, 0);
650 if (IS_ERR_OR_NULL(mr->umem)) {
651 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
652 goto err_free;
653 }
654
655 mr->ibmr.lkey = mr->ibmr.rkey = 0;
656 return &mr->ibmr;
657
658err_free:
659 kfree(mr);
660 return ERR_PTR(err);
661}
662
663int usnic_ib_dereg_mr(struct ib_mr *ibmr)
664{
665 struct usnic_ib_mr *mr = to_umr(ibmr);
666
667 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
668
669 usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing);
670 kfree(mr);
671 return 0;
672}
673
674struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
675 struct ib_udata *udata)
676{
677 struct usnic_ib_ucontext *context;
678 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
679 usnic_dbg("\n");
680
681 context = kmalloc(sizeof(*context), GFP_KERNEL);
682 if (!context)
683 return ERR_PTR(-ENOMEM);
684
685 INIT_LIST_HEAD(&context->qp_grp_list);
686 mutex_lock(&us_ibdev->usdev_lock);
687 list_add_tail(&context->link, &us_ibdev->ctx_list);
688 mutex_unlock(&us_ibdev->usdev_lock);
689
690 return &context->ibucontext;
691}
692
693int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
694{
695 struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
696 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
697 usnic_dbg("\n");
698
699 mutex_lock(&us_ibdev->usdev_lock);
700 BUG_ON(!list_empty(&context->qp_grp_list));
701 list_del(&context->link);
702 mutex_unlock(&us_ibdev->usdev_lock);
703 kfree(context);
704 return 0;
705}
706
707int usnic_ib_mmap(struct ib_ucontext *context,
708 struct vm_area_struct *vma)
709{
710 struct usnic_ib_ucontext *uctx = to_ucontext(context);
711 struct usnic_ib_dev *us_ibdev;
712 struct usnic_ib_qp_grp *qp_grp;
713 struct usnic_ib_vf *vf;
714 struct vnic_dev_bar *bar;
715 dma_addr_t bus_addr;
716 unsigned int len;
717 unsigned int vfid;
718
719 usnic_dbg("\n");
720
721 us_ibdev = to_usdev(context->device);
722 vma->vm_flags |= VM_IO;
723 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
724 vfid = vma->vm_pgoff;
725 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
726 vma->vm_pgoff, PAGE_SHIFT, vfid);
727
728 mutex_lock(&us_ibdev->usdev_lock);
729 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
730 vf = qp_grp->vf;
731 if (usnic_vnic_get_index(vf->vnic) == vfid) {
732 bar = usnic_vnic_get_bar(vf->vnic, 0);
733 if ((vma->vm_end - vma->vm_start) != bar->len) {
734 usnic_err("Bar0 Len %lu - Request map %lu\n",
735 bar->len,
736 vma->vm_end - vma->vm_start);
737 mutex_unlock(&us_ibdev->usdev_lock);
738 return -EINVAL;
739 }
740 bus_addr = bar->bus_addr;
741 len = bar->len;
742 usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
743 &bus_addr, bar->vaddr, bar->len);
744 mutex_unlock(&us_ibdev->usdev_lock);
745
746 return remap_pfn_range(vma,
747 vma->vm_start,
748 bus_addr >> PAGE_SHIFT,
749 len, vma->vm_page_prot);
750 }
751 }
752
753 mutex_unlock(&us_ibdev->usdev_lock);
754 usnic_err("No VF %u found\n", vfid);
755 return -EINVAL;
756}
757
758
759struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
760 struct rdma_ah_attr *ah_attr,
761 struct ib_udata *udata)
762
763{
764 usnic_dbg("\n");
765 return ERR_PTR(-EPERM);
766}
767
768int usnic_ib_destroy_ah(struct ib_ah *ah)
769{
770 usnic_dbg("\n");
771 return -EINVAL;
772}
773
774int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
775 struct ib_send_wr **bad_wr)
776{
777 usnic_dbg("\n");
778 return -EINVAL;
779}
780
781int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
782 struct ib_recv_wr **bad_wr)
783{
784 usnic_dbg("\n");
785 return -EINVAL;
786}
787
788int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
789 struct ib_wc *wc)
790{
791 usnic_dbg("\n");
792 return -EINVAL;
793}
794
795int usnic_ib_req_notify_cq(struct ib_cq *cq,
796 enum ib_cq_notify_flags flags)
797{
798 usnic_dbg("\n");
799 return -EINVAL;
800}
801
802struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
803{
804 usnic_dbg("\n");
805 return ERR_PTR(-ENOMEM);
806}
807
808
809
810
811
