1 /*
2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
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
54 const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = {
55 { /*USNIC_TRANSPORT_UNKNOWN*/
56 .resources = {
57 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
58 },
59 },
60 { /*USNIC_TRANSPORT_ROCE_CUSTOM*/
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 { /*USNIC_TRANSPORT_IPV4_UDP*/
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
usnic_ib_fw_string_to_u64(char * fw_ver_str,u64 * fw_ver)78 static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
79 {
80 *fw_ver = *((u64 *)fw_ver_str);
81 }
82
usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp * qp_grp,struct ib_udata * udata)83 static 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
171 static struct usnic_ib_qp_grp*
find_free_vf_and_create_qp_grp(struct usnic_ib_dev * us_ibdev,struct usnic_ib_pd * pd,struct usnic_transport_spec * trans_spec,struct usnic_vnic_res_spec * res_spec)172 find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
173 struct usnic_ib_pd *pd,
174 struct usnic_transport_spec *trans_spec,
175 struct usnic_vnic_res_spec *res_spec)
176 {
177 struct usnic_ib_vf *vf;
178 struct usnic_vnic *vnic;
179 struct usnic_ib_qp_grp *qp_grp;
180 struct device *dev, **dev_list;
181 int i;
182
183 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
184
185 if (list_empty(&us_ibdev->vf_dev_list)) {
186 usnic_info("No vfs to allocate\n");
187 return NULL;
188 }
189
190 if (usnic_ib_share_vf) {
191 /* Try to find resouces on a used vf which is in pd */
192 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
193 if (IS_ERR(dev_list))
194 return ERR_CAST(dev_list);
195 for (i = 0; dev_list[i]; i++) {
196 dev = dev_list[i];
197 vf = dev_get_drvdata(dev);
198 spin_lock(&vf->lock);
199 vnic = vf->vnic;
200 if (!usnic_vnic_check_room(vnic, res_spec)) {
201 usnic_dbg("Found used vnic %s from %s\n",
202 dev_name(&us_ibdev->ib_dev.dev),
203 pci_name(usnic_vnic_get_pdev(
204 vnic)));
205 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev,
206 vf, pd,
207 res_spec,
208 trans_spec);
209
210 spin_unlock(&vf->lock);
211 goto qp_grp_check;
212 }
213 spin_unlock(&vf->lock);
214
215 }
216 usnic_uiom_free_dev_list(dev_list);
217 dev_list = NULL;
218 }
219
220 /* Try to find resources on an unused vf */
221 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
222 spin_lock(&vf->lock);
223 vnic = vf->vnic;
224 if (vf->qp_grp_ref_cnt == 0 &&
225 usnic_vnic_check_room(vnic, res_spec) == 0) {
226 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf,
227 pd, res_spec,
228 trans_spec);
229
230 spin_unlock(&vf->lock);
231 goto qp_grp_check;
232 }
233 spin_unlock(&vf->lock);
234 }
235
236 usnic_info("No free qp grp found on %s\n",
237 dev_name(&us_ibdev->ib_dev.dev));
238 return ERR_PTR(-ENOMEM);
239
240 qp_grp_check:
241 if (IS_ERR_OR_NULL(qp_grp)) {
242 usnic_err("Failed to allocate qp_grp\n");
243 if (usnic_ib_share_vf)
244 usnic_uiom_free_dev_list(dev_list);
245 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
246 }
247 return qp_grp;
248 }
249
qp_grp_destroy(struct usnic_ib_qp_grp * qp_grp)250 static 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 spin_lock(&vf->lock);
257 usnic_ib_qp_grp_destroy(qp_grp);
258 spin_unlock(&vf->lock);
259 }
260
create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)261 static 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 /* Start of ib callback functions */
271
usnic_ib_port_link_layer(struct ib_device * device,u8 port_num)272 enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
273 u8 port_num)
274 {
275 return IB_LINK_LAYER_ETHERNET;
276 }
277
usnic_ib_query_device(struct ib_device * ibdev,struct ib_device_attr * props,struct ib_udata * uhw)278 int 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 /* Owned by Userspace
329 * max_qp_wr, max_sge, max_sge_rd, max_cqe */
330 mutex_unlock(&us_ibdev->usdev_lock);
331
332 return 0;
333 }
334
usnic_ib_query_port(struct ib_device * ibdev,u8 port,struct ib_port_attr * props)335 int usnic_ib_query_port(struct ib_device *ibdev, u8 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 * usdev_lock is acquired after (and not before) ib_get_eth_speed call
348 * because acquiring rtnl_lock in ib_get_eth_speed, while holding
349 * usdev_lock could lead to a deadlock.
350 */
351 mutex_lock(&us_ibdev->usdev_lock);
352 /* props being zeroed by the caller, avoid zeroing it here */
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 /* Userspace will adjust for hdrs */
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
usnic_ib_query_qp(struct ib_qp * qp,struct ib_qp_attr * qp_attr,int qp_attr_mask,struct ib_qp_init_attr * qp_init_attr)385 int 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
418 err_out:
419 mutex_unlock(&vf->pf->usdev_lock);
420 return err;
421 }
422
usnic_ib_query_gid(struct ib_device * ibdev,u8 port,int index,union ib_gid * gid)423 int usnic_ib_query_gid(struct ib_device *ibdev, u8 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
usnic_ib_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)442 int 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
usnic_ib_dealloc_pd(struct ib_pd * pd,struct ib_udata * udata)455 int 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
usnic_ib_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)461 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
462 struct ib_qp_init_attr *init_attr,
463 struct ib_udata *udata)
464 {
465 int err;
466 struct usnic_ib_dev *us_ibdev;
467 struct usnic_ib_qp_grp *qp_grp;
468 struct usnic_ib_ucontext *ucontext = rdma_udata_to_drv_context(
469 udata, struct usnic_ib_ucontext, ibucontext);
470 int cq_cnt;
471 struct usnic_vnic_res_spec res_spec;
472 struct usnic_ib_create_qp_cmd cmd;
473 struct usnic_transport_spec trans_spec;
474
475 usnic_dbg("\n");
476
477 us_ibdev = to_usdev(pd->device);
478
479 if (init_attr->create_flags)
480 return ERR_PTR(-EINVAL);
481
482 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
483 if (err) {
484 usnic_err("%s: cannot copy udata for create_qp\n",
485 dev_name(&us_ibdev->ib_dev.dev));
486 return ERR_PTR(-EINVAL);
487 }
488
489 err = create_qp_validate_user_data(cmd);
490 if (err) {
491 usnic_err("%s: Failed to validate user data\n",
492 dev_name(&us_ibdev->ib_dev.dev));
493 return ERR_PTR(-EINVAL);
494 }
495
496 if (init_attr->qp_type != IB_QPT_UD) {
497 usnic_err("%s asked to make a non-UD QP: %d\n",
498 dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type);
499 return ERR_PTR(-EOPNOTSUPP);
500 }
501
502 trans_spec = cmd.spec;
503 mutex_lock(&us_ibdev->usdev_lock);
504 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
505 res_spec = min_transport_spec[trans_spec.trans_type];
506 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
507 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
508 &trans_spec,
509 &res_spec);
510 if (IS_ERR_OR_NULL(qp_grp)) {
511 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
512 goto out_release_mutex;
513 }
514
515 err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
516 if (err) {
517 err = -EBUSY;
518 goto out_release_qp_grp;
519 }
520
521 qp_grp->ctx = ucontext;
522 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
523 usnic_ib_log_vf(qp_grp->vf);
524 mutex_unlock(&us_ibdev->usdev_lock);
525 return &qp_grp->ibqp;
526
527 out_release_qp_grp:
528 qp_grp_destroy(qp_grp);
529 out_release_mutex:
530 mutex_unlock(&us_ibdev->usdev_lock);
531 return ERR_PTR(err);
532 }
533
usnic_ib_destroy_qp(struct ib_qp * qp,struct ib_udata * udata)534 int usnic_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
535 {
536 struct usnic_ib_qp_grp *qp_grp;
537 struct usnic_ib_vf *vf;
538
539 usnic_dbg("\n");
540
541 qp_grp = to_uqp_grp(qp);
542 vf = qp_grp->vf;
543 mutex_lock(&vf->pf->usdev_lock);
544 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
545 usnic_err("Failed to move qp grp %u to reset\n",
546 qp_grp->grp_id);
547 }
548
549 list_del(&qp_grp->link);
550 qp_grp_destroy(qp_grp);
551 mutex_unlock(&vf->pf->usdev_lock);
552
553 return 0;
554 }
555
usnic_ib_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)556 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
557 int attr_mask, struct ib_udata *udata)
558 {
559 struct usnic_ib_qp_grp *qp_grp;
560 int status;
561 usnic_dbg("\n");
562
563 qp_grp = to_uqp_grp(ibqp);
564
565 mutex_lock(&qp_grp->vf->pf->usdev_lock);
566 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
567 /* usnic devices only have one port */
568 status = -EINVAL;
569 goto out_unlock;
570 }
571 if (attr_mask & IB_QP_STATE) {
572 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
573 } else {
574 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
575 status = -EINVAL;
576 }
577
578 out_unlock:
579 mutex_unlock(&qp_grp->vf->pf->usdev_lock);
580 return status;
581 }
582
usnic_ib_create_cq(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct ib_udata * udata)583 int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
584 struct ib_udata *udata)
585 {
586 if (attr->flags)
587 return -EINVAL;
588
589 return 0;
590 }
591
usnic_ib_destroy_cq(struct ib_cq * cq,struct ib_udata * udata)592 int usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
593 {
594 return 0;
595 }
596
usnic_ib_reg_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt_addr,int access_flags,struct ib_udata * udata)597 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
598 u64 virt_addr, int access_flags,
599 struct ib_udata *udata)
600 {
601 struct usnic_ib_mr *mr;
602 int err;
603
604 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
605 virt_addr, length);
606
607 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
608 if (!mr)
609 return ERR_PTR(-ENOMEM);
610
611 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
612 access_flags, 0);
613 if (IS_ERR_OR_NULL(mr->umem)) {
614 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
615 goto err_free;
616 }
617
618 mr->ibmr.lkey = mr->ibmr.rkey = 0;
619 return &mr->ibmr;
620
621 err_free:
622 kfree(mr);
623 return ERR_PTR(err);
624 }
625
usnic_ib_dereg_mr(struct ib_mr * ibmr,struct ib_udata * udata)626 int usnic_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
627 {
628 struct usnic_ib_mr *mr = to_umr(ibmr);
629
630 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
631
632 usnic_uiom_reg_release(mr->umem);
633 kfree(mr);
634 return 0;
635 }
636
usnic_ib_alloc_ucontext(struct ib_ucontext * uctx,struct ib_udata * udata)637 int usnic_ib_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
638 {
639 struct ib_device *ibdev = uctx->device;
640 struct usnic_ib_ucontext *context = to_ucontext(uctx);
641 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
642 usnic_dbg("\n");
643
644 INIT_LIST_HEAD(&context->qp_grp_list);
645 mutex_lock(&us_ibdev->usdev_lock);
646 list_add_tail(&context->link, &us_ibdev->ctx_list);
647 mutex_unlock(&us_ibdev->usdev_lock);
648
649 return 0;
650 }
651
usnic_ib_dealloc_ucontext(struct ib_ucontext * ibcontext)652 void usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
653 {
654 struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
655 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
656 usnic_dbg("\n");
657
658 mutex_lock(&us_ibdev->usdev_lock);
659 WARN_ON_ONCE(!list_empty(&context->qp_grp_list));
660 list_del(&context->link);
661 mutex_unlock(&us_ibdev->usdev_lock);
662 }
663
usnic_ib_mmap(struct ib_ucontext * context,struct vm_area_struct * vma)664 int 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