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18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/slab.h>
21#include <linux/errno.h>
22
23#include <rdma/ib_user_verbs.h>
24#include <rdma/ib_addr.h>
25
26#include "usnic_abi.h"
27#include "usnic_ib.h"
28#include "usnic_common_util.h"
29#include "usnic_ib_qp_grp.h"
30#include "usnic_fwd.h"
31#include "usnic_log.h"
32#include "usnic_uiom.h"
33#include "usnic_transport.h"
34
35#define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
36
37static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
38{
39 *fw_ver = (u64) *fw_ver_str;
40}
41
42static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
43 struct ib_udata *udata)
44{
45 struct usnic_ib_dev *us_ibdev;
46 struct usnic_ib_create_qp_resp resp;
47 struct pci_dev *pdev;
48 struct vnic_dev_bar *bar;
49 struct usnic_vnic_res_chunk *chunk;
50 struct usnic_ib_qp_grp_flow *default_flow;
51 int i, err;
52
53 memset(&resp, 0, sizeof(resp));
54
55 us_ibdev = qp_grp->vf->pf;
56 pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
57 if (!pdev) {
58 usnic_err("Failed to get pdev of qp_grp %d\n",
59 qp_grp->grp_id);
60 return -EFAULT;
61 }
62
63 bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
64 if (!bar) {
65 usnic_err("Failed to get bar0 of qp_grp %d vf %s",
66 qp_grp->grp_id, pci_name(pdev));
67 return -EFAULT;
68 }
69
70 resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
71 resp.bar_bus_addr = bar->bus_addr;
72 resp.bar_len = bar->len;
73
74 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
75 if (IS_ERR_OR_NULL(chunk)) {
76 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
77 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
78 qp_grp->grp_id,
79 PTR_ERR(chunk));
80 return chunk ? PTR_ERR(chunk) : -ENOMEM;
81 }
82
83 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
84 resp.rq_cnt = chunk->cnt;
85 for (i = 0; i < chunk->cnt; i++)
86 resp.rq_idx[i] = chunk->res[i]->vnic_idx;
87
88 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
89 if (IS_ERR_OR_NULL(chunk)) {
90 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
91 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
92 qp_grp->grp_id,
93 PTR_ERR(chunk));
94 return chunk ? PTR_ERR(chunk) : -ENOMEM;
95 }
96
97 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
98 resp.wq_cnt = chunk->cnt;
99 for (i = 0; i < chunk->cnt; i++)
100 resp.wq_idx[i] = chunk->res[i]->vnic_idx;
101
102 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
103 if (IS_ERR_OR_NULL(chunk)) {
104 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
105 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
106 qp_grp->grp_id,
107 PTR_ERR(chunk));
108 return chunk ? PTR_ERR(chunk) : -ENOMEM;
109 }
110
111 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
112 resp.cq_cnt = chunk->cnt;
113 for (i = 0; i < chunk->cnt; i++)
114 resp.cq_idx[i] = chunk->res[i]->vnic_idx;
115
116 default_flow = list_first_entry(&qp_grp->flows_lst,
117 struct usnic_ib_qp_grp_flow, link);
118 resp.transport = default_flow->trans_type;
119
120 err = ib_copy_to_udata(udata, &resp, sizeof(resp));
121 if (err) {
122 usnic_err("Failed to copy udata for %s", us_ibdev->ib_dev.name);
123 return err;
124 }
125
126 return 0;
127}
128
129static struct usnic_ib_qp_grp*
130find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
131 struct usnic_ib_pd *pd,
132 struct usnic_transport_spec *trans_spec,
133 struct usnic_vnic_res_spec *res_spec)
134{
135 struct usnic_ib_vf *vf;
136 struct usnic_vnic *vnic;
137 struct usnic_ib_qp_grp *qp_grp;
138 struct device *dev, **dev_list;
139 int i, found = 0;
140
141 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
142
143 if (list_empty(&us_ibdev->vf_dev_list)) {
144 usnic_info("No vfs to allocate\n");
145 return NULL;
146 }
147
148 if (usnic_ib_share_vf) {
149
150 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
151 for (i = 0; dev_list[i]; i++) {
152 dev = dev_list[i];
153 vf = pci_get_drvdata(to_pci_dev(dev));
154 spin_lock(&vf->lock);
155 vnic = vf->vnic;
156 if (!usnic_vnic_check_room(vnic, res_spec)) {
157 usnic_dbg("Found used vnic %s from %s\n",
158 us_ibdev->ib_dev.name,
159 pci_name(usnic_vnic_get_pdev(
160 vnic)));
161 found = 1;
162 break;
163 }
164 spin_unlock(&vf->lock);
165
166 }
167 usnic_uiom_free_dev_list(dev_list);
168 }
169
170 if (!found) {
171
172 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
173 spin_lock(&vf->lock);
174 vnic = vf->vnic;
175 if (vf->qp_grp_ref_cnt == 0 &&
176 usnic_vnic_check_room(vnic, res_spec) == 0) {
177 found = 1;
178 break;
179 }
180 spin_unlock(&vf->lock);
181 }
182 }
183
184 if (!found) {
185 usnic_info("No free qp grp found on %s\n",
186 us_ibdev->ib_dev.name);
187 return ERR_PTR(-ENOMEM);
188 }
189
190 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf, pd, res_spec,
191 trans_spec);
192 spin_unlock(&vf->lock);
193 if (IS_ERR_OR_NULL(qp_grp)) {
194 usnic_err("Failed to allocate qp_grp\n");
195 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
196 }
197
198 return qp_grp;
199}
200
201static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
202{
203 struct usnic_ib_vf *vf = qp_grp->vf;
204
205 WARN_ON(qp_grp->state != IB_QPS_RESET);
206
207 spin_lock(&vf->lock);
208 usnic_ib_qp_grp_destroy(qp_grp);
209 spin_unlock(&vf->lock);
210}
211
212static void eth_speed_to_ib_speed(int speed, u8 *active_speed,
213 u8 *active_width)
214{
215 if (speed <= 10000) {
216 *active_width = IB_WIDTH_1X;
217 *active_speed = IB_SPEED_FDR10;
218 } else if (speed <= 20000) {
219 *active_width = IB_WIDTH_4X;
220 *active_speed = IB_SPEED_DDR;
221 } else if (speed <= 30000) {
222 *active_width = IB_WIDTH_4X;
223 *active_speed = IB_SPEED_QDR;
224 } else if (speed <= 40000) {
225 *active_width = IB_WIDTH_4X;
226 *active_speed = IB_SPEED_FDR10;
227 } else {
228 *active_width = IB_WIDTH_4X;
229 *active_speed = IB_SPEED_EDR;
230 }
231}
232
233static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
234{
235 if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
236 cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
237 return -EINVAL;
238
239 return 0;
240}
241
242
243
244enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
245 u8 port_num)
246{
247 return IB_LINK_LAYER_ETHERNET;
248}
249
250int usnic_ib_query_device(struct ib_device *ibdev,
251 struct ib_device_attr *props)
252{
253 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
254 union ib_gid gid;
255 struct ethtool_drvinfo info;
256 struct ethtool_cmd cmd;
257 int qp_per_vf;
258
259 usnic_dbg("\n");
260 mutex_lock(&us_ibdev->usdev_lock);
261 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
262 us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
263 memset(props, 0, sizeof(*props));
264 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
265 &gid.raw[0]);
266 memcpy(&props->sys_image_guid, &gid.global.interface_id,
267 sizeof(gid.global.interface_id));
268 usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
269 props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
270 props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
271 props->vendor_id = PCI_VENDOR_ID_CISCO;
272 props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
273 props->hw_ver = us_ibdev->pdev->subsystem_device;
274 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
275 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
276 props->max_qp = qp_per_vf *
277 atomic_read(&us_ibdev->vf_cnt.refcount);
278 props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
279 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
280 props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
281 atomic_read(&us_ibdev->vf_cnt.refcount);
282 props->max_pd = USNIC_UIOM_MAX_PD_CNT;
283 props->max_mr = USNIC_UIOM_MAX_MR_CNT;
284 props->local_ca_ack_delay = 0;
285 props->max_pkeys = 0;
286 props->atomic_cap = IB_ATOMIC_NONE;
287 props->masked_atomic_cap = props->atomic_cap;
288 props->max_qp_rd_atom = 0;
289 props->max_qp_init_rd_atom = 0;
290 props->max_res_rd_atom = 0;
291 props->max_srq = 0;
292 props->max_srq_wr = 0;
293 props->max_srq_sge = 0;
294 props->max_fast_reg_page_list_len = 0;
295 props->max_mcast_grp = 0;
296 props->max_mcast_qp_attach = 0;
297 props->max_total_mcast_qp_attach = 0;
298 props->max_map_per_fmr = 0;
299
300
301 mutex_unlock(&us_ibdev->usdev_lock);
302
303 return 0;
304}
305
306int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
307 struct ib_port_attr *props)
308{
309 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
310 struct ethtool_cmd cmd;
311
312 usnic_dbg("\n");
313
314 mutex_lock(&us_ibdev->usdev_lock);
315 us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
316 memset(props, 0, sizeof(*props));
317
318 props->lid = 0;
319 props->lmc = 1;
320 props->sm_lid = 0;
321 props->sm_sl = 0;
322
323 if (!us_ibdev->ufdev->link_up) {
324 props->state = IB_PORT_DOWN;
325 props->phys_state = 3;
326 } else if (!us_ibdev->ufdev->inaddr) {
327 props->state = IB_PORT_INIT;
328 props->phys_state = 4;
329 } else {
330 props->state = IB_PORT_ACTIVE;
331 props->phys_state = 5;
332 }
333
334 props->port_cap_flags = 0;
335 props->gid_tbl_len = 1;
336 props->pkey_tbl_len = 1;
337 props->bad_pkey_cntr = 0;
338 props->qkey_viol_cntr = 0;
339 eth_speed_to_ib_speed(cmd.speed, &props->active_speed,
340 &props->active_width);
341 props->max_mtu = IB_MTU_4096;
342 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
343
344 props->max_msg_sz = us_ibdev->ufdev->mtu;
345 props->max_vl_num = 1;
346 mutex_unlock(&us_ibdev->usdev_lock);
347
348 return 0;
349}
350
351int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
352 int qp_attr_mask,
353 struct ib_qp_init_attr *qp_init_attr)
354{
355 struct usnic_ib_qp_grp *qp_grp;
356 struct usnic_ib_vf *vf;
357 int err;
358
359 usnic_dbg("\n");
360
361 memset(qp_attr, 0, sizeof(*qp_attr));
362 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
363
364 qp_grp = to_uqp_grp(qp);
365 vf = qp_grp->vf;
366 mutex_lock(&vf->pf->usdev_lock);
367 usnic_dbg("\n");
368 qp_attr->qp_state = qp_grp->state;
369 qp_attr->cur_qp_state = qp_grp->state;
370
371 switch (qp_grp->ibqp.qp_type) {
372 case IB_QPT_UD:
373 qp_attr->qkey = 0;
374 break;
375 default:
376 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
377 err = -EINVAL;
378 goto err_out;
379 }
380
381 mutex_unlock(&vf->pf->usdev_lock);
382 return 0;
383
384err_out:
385 mutex_unlock(&vf->pf->usdev_lock);
386 return err;
387}
388
389int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
390 union ib_gid *gid)
391{
392
393 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
394 usnic_dbg("\n");
395
396 if (index > 1)
397 return -EINVAL;
398
399 mutex_lock(&us_ibdev->usdev_lock);
400 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
401 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
402 &gid->raw[0]);
403 mutex_unlock(&us_ibdev->usdev_lock);
404
405 return 0;
406}
407
408int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
409 u16 *pkey)
410{
411 if (index > 1)
412 return -EINVAL;
413
414 *pkey = 0xffff;
415 return 0;
416}
417
418struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
419 struct ib_ucontext *context,
420 struct ib_udata *udata)
421{
422 struct usnic_ib_pd *pd;
423 void *umem_pd;
424
425 usnic_dbg("\n");
426
427 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
428 if (!pd)
429 return ERR_PTR(-ENOMEM);
430
431 umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
432 if (IS_ERR_OR_NULL(umem_pd)) {
433 kfree(pd);
434 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
435 }
436
437 usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
438 pd, context, ibdev->name);
439 return &pd->ibpd;
440}
441
442int usnic_ib_dealloc_pd(struct ib_pd *pd)
443{
444 usnic_info("freeing domain 0x%p\n", pd);
445
446 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
447 kfree(pd);
448 return 0;
449}
450
451struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
452 struct ib_qp_init_attr *init_attr,
453 struct ib_udata *udata)
454{
455 int err;
456 struct usnic_ib_dev *us_ibdev;
457 struct usnic_ib_qp_grp *qp_grp;
458 struct usnic_ib_ucontext *ucontext;
459 int cq_cnt;
460 struct usnic_vnic_res_spec res_spec;
461 struct usnic_ib_create_qp_cmd cmd;
462 struct usnic_transport_spec trans_spec;
463
464 usnic_dbg("\n");
465
466 ucontext = to_uucontext(pd->uobject->context);
467 us_ibdev = to_usdev(pd->device);
468
469 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
470 if (err) {
471 usnic_err("%s: cannot copy udata for create_qp\n",
472 us_ibdev->ib_dev.name);
473 return ERR_PTR(-EINVAL);
474 }
475
476 err = create_qp_validate_user_data(cmd);
477 if (err) {
478 usnic_err("%s: Failed to validate user data\n",
479 us_ibdev->ib_dev.name);
480 return ERR_PTR(-EINVAL);
481 }
482
483 if (init_attr->qp_type != IB_QPT_UD) {
484 usnic_err("%s asked to make a non-UD QP: %d\n",
485 us_ibdev->ib_dev.name, init_attr->qp_type);
486 return ERR_PTR(-EINVAL);
487 }
488
489 trans_spec = cmd.spec;
490 mutex_lock(&us_ibdev->usdev_lock);
491 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
492 res_spec = min_transport_spec[trans_spec.trans_type];
493 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
494 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
495 &trans_spec,
496 &res_spec);
497 if (IS_ERR_OR_NULL(qp_grp)) {
498 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
499 goto out_release_mutex;
500 }
501
502 err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
503 if (err) {
504 err = -EBUSY;
505 goto out_release_qp_grp;
506 }
507
508 qp_grp->ctx = ucontext;
509 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
510 usnic_ib_log_vf(qp_grp->vf);
511 mutex_unlock(&us_ibdev->usdev_lock);
512 return &qp_grp->ibqp;
513
514out_release_qp_grp:
515 qp_grp_destroy(qp_grp);
516out_release_mutex:
517 mutex_unlock(&us_ibdev->usdev_lock);
518 return ERR_PTR(err);
519}
520
521int usnic_ib_destroy_qp(struct ib_qp *qp)
522{
523 struct usnic_ib_qp_grp *qp_grp;
524 struct usnic_ib_vf *vf;
525
526 usnic_dbg("\n");
527
528 qp_grp = to_uqp_grp(qp);
529 vf = qp_grp->vf;
530 mutex_lock(&vf->pf->usdev_lock);
531 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
532 usnic_err("Failed to move qp grp %u to reset\n",
533 qp_grp->grp_id);
534 }
535
536 list_del(&qp_grp->link);
537 qp_grp_destroy(qp_grp);
538 mutex_unlock(&vf->pf->usdev_lock);
539
540 return 0;
541}
542
543int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
544 int attr_mask, struct ib_udata *udata)
545{
546 struct usnic_ib_qp_grp *qp_grp;
547 int status;
548 usnic_dbg("\n");
549
550 qp_grp = to_uqp_grp(ibqp);
551
552
553 mutex_lock(&qp_grp->vf->pf->usdev_lock);
554 if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT) {
555 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_INIT, NULL);
556 } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTR) {
557 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTR, NULL);
558 } else if ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_RTS) {
559 status = usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RTS, NULL);
560 } else {
561 usnic_err("Unexpected combination mask: %u state: %u\n",
562 attr_mask & IB_QP_STATE, attr->qp_state);
563 status = -EINVAL;
564 }
565
566 mutex_unlock(&qp_grp->vf->pf->usdev_lock);
567 return status;
568}
569
570struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev, int entries,
571 int vector, struct ib_ucontext *context,
572 struct ib_udata *udata)
573{
574 struct ib_cq *cq;
575
576 usnic_dbg("\n");
577 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
578 if (!cq)
579 return ERR_PTR(-EBUSY);
580
581 return cq;
582}
583
584int usnic_ib_destroy_cq(struct ib_cq *cq)
585{
586 usnic_dbg("\n");
587 kfree(cq);
588 return 0;
589}
590
591struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
592 u64 virt_addr, int access_flags,
593 struct ib_udata *udata)
594{
595 struct usnic_ib_mr *mr;
596 int err;
597
598 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
599 virt_addr, length);
600
601 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
602 if (IS_ERR_OR_NULL(mr))
603 return ERR_PTR(mr ? PTR_ERR(mr) : -ENOMEM);
604
605 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
606 access_flags, 0);
607 if (IS_ERR_OR_NULL(mr->umem)) {
608 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
609 goto err_free;
610 }
611
612 mr->ibmr.lkey = mr->ibmr.rkey = 0;
613 return &mr->ibmr;
614
615err_free:
616 kfree(mr);
617 return ERR_PTR(err);
618}
619
620int usnic_ib_dereg_mr(struct ib_mr *ibmr)
621{
622 struct usnic_ib_mr *mr = to_umr(ibmr);
623
624 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
625
626 usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing);
627 kfree(mr);
628 return 0;
629}
630
631struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
632 struct ib_udata *udata)
633{
634 struct usnic_ib_ucontext *context;
635 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
636 usnic_dbg("\n");
637
638 context = kmalloc(sizeof(*context), GFP_KERNEL);
639 if (!context)
640 return ERR_PTR(-ENOMEM);
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 &context->ibucontext;
648}
649
650int 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 BUG_ON(!list_empty(&context->qp_grp_list));
658 list_del(&context->link);
659 mutex_unlock(&us_ibdev->usdev_lock);
660 kfree(context);
661 return 0;
662}
663
664int usnic_ib_mmap(struct ib_ucontext *context,
665 struct vm_area_struct *vma)
666{
667 struct usnic_ib_ucontext *uctx = to_ucontext(context);
668 struct usnic_ib_dev *us_ibdev;
669 struct usnic_ib_qp_grp *qp_grp;
670 struct usnic_ib_vf *vf;
671 struct vnic_dev_bar *bar;
672 dma_addr_t bus_addr;
673 unsigned int len;
674 unsigned int vfid;
675
676 usnic_dbg("\n");
677
678 us_ibdev = to_usdev(context->device);
679 vma->vm_flags |= VM_IO;
680 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
681 vfid = vma->vm_pgoff;
682 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
683 vma->vm_pgoff, PAGE_SHIFT, vfid);
684
685 mutex_lock(&us_ibdev->usdev_lock);
686 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
687 vf = qp_grp->vf;
688 if (usnic_vnic_get_index(vf->vnic) == vfid) {
689 bar = usnic_vnic_get_bar(vf->vnic, 0);
690 if ((vma->vm_end - vma->vm_start) != bar->len) {
691 usnic_err("Bar0 Len %lu - Request map %lu\n",
692 bar->len,
693 vma->vm_end - vma->vm_start);
694 mutex_unlock(&us_ibdev->usdev_lock);
695 return -EINVAL;
696 }
697 bus_addr = bar->bus_addr;
698 len = bar->len;
699 usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
700 &bus_addr, bar->vaddr, bar->len);
701 mutex_unlock(&us_ibdev->usdev_lock);
702
703 return remap_pfn_range(vma,
704 vma->vm_start,
705 bus_addr >> PAGE_SHIFT,
706 len, vma->vm_page_prot);
707 }
708 }
709
710 mutex_unlock(&us_ibdev->usdev_lock);
711 usnic_err("No VF %u found\n", vfid);
712 return -EINVAL;
713}
714
715
716struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
717 struct ib_ah_attr *ah_attr)
718{
719 usnic_dbg("\n");
720 return ERR_PTR(-EPERM);
721}
722
723int usnic_ib_destroy_ah(struct ib_ah *ah)
724{
725 usnic_dbg("\n");
726 return -EINVAL;
727}
728
729int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
730 struct ib_send_wr **bad_wr)
731{
732 usnic_dbg("\n");
733 return -EINVAL;
734}
735
736int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
737 struct ib_recv_wr **bad_wr)
738{
739 usnic_dbg("\n");
740 return -EINVAL;
741}
742
743int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
744 struct ib_wc *wc)
745{
746 usnic_dbg("\n");
747 return -EINVAL;
748}
749
750int usnic_ib_req_notify_cq(struct ib_cq *cq,
751 enum ib_cq_notify_flags flags)
752{
753 usnic_dbg("\n");
754 return -EINVAL;
755}
756
757struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
758{
759 usnic_dbg("\n");
760 return ERR_PTR(-ENOMEM);
761}
762
763
764
765
766
