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/init.h>
34 #include <linux/slab.h>
35 #include <linux/errno.h>
36
37 #include <rdma/ib_user_verbs.h>
38 #include <rdma/ib_addr.h>
39 #include <rdma/uverbs_ioctl.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
53 const struct usnic_vnic_res_spec min_transport_spec[USNIC_TRANSPORT_MAX] = {
54 { /*USNIC_TRANSPORT_UNKNOWN*/
55 .resources = {
56 {.type = USNIC_VNIC_RES_TYPE_EOL, .cnt = 0,},
57 },
58 },
59 { /*USNIC_TRANSPORT_ROCE_CUSTOM*/
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 { /*USNIC_TRANSPORT_IPV4_UDP*/
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
usnic_ib_fw_string_to_u64(char * fw_ver_str,u64 * fw_ver)77 static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
78 {
79 *fw_ver = *((u64 *)fw_ver_str);
80 }
81
usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp * qp_grp,struct ib_udata * udata)82 static 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",
163 dev_name(&us_ibdev->ib_dev.dev));
164 return err;
165 }
166
167 return 0;
168 }
169
170 static int
find_free_vf_and_create_qp_grp(struct ib_qp * qp,struct usnic_transport_spec * trans_spec,struct usnic_vnic_res_spec * res_spec)171 find_free_vf_and_create_qp_grp(struct ib_qp *qp,
172 struct usnic_transport_spec *trans_spec,
173 struct usnic_vnic_res_spec *res_spec)
174 {
175 struct usnic_ib_dev *us_ibdev = to_usdev(qp->device);
176 struct usnic_ib_pd *pd = to_upd(qp->pd);
177 struct usnic_ib_vf *vf;
178 struct usnic_vnic *vnic;
179 struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(qp);
180 struct device *dev, **dev_list;
181 int i, ret;
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 -ENOMEM;
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 PTR_ERR(dev_list);
195 for (i = 0; dev_list[i]; i++) {
196 dev = dev_list[i];
197 vf = dev_get_drvdata(dev);
198 mutex_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 ret = usnic_ib_qp_grp_create(qp_grp,
206 us_ibdev->ufdev,
207 vf, pd, res_spec,
208 trans_spec);
209
210 mutex_unlock(&vf->lock);
211 goto qp_grp_check;
212 }
213 mutex_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 mutex_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 ret = usnic_ib_qp_grp_create(qp_grp, us_ibdev->ufdev,
227 vf, pd, res_spec,
228 trans_spec);
229
230 mutex_unlock(&vf->lock);
231 goto qp_grp_check;
232 }
233 mutex_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 -ENOMEM;
239
240 qp_grp_check:
241 if (ret) {
242 usnic_err("Failed to allocate qp_grp\n");
243 if (usnic_ib_share_vf)
244 usnic_uiom_free_dev_list(dev_list);
245 }
246 return ret;
247 }
248
qp_grp_destroy(struct usnic_ib_qp_grp * qp_grp)249 static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
250 {
251 struct usnic_ib_vf *vf = qp_grp->vf;
252
253 WARN_ON(qp_grp->state != IB_QPS_RESET);
254
255 mutex_lock(&vf->lock);
256 usnic_ib_qp_grp_destroy(qp_grp);
257 mutex_unlock(&vf->lock);
258 }
259
create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)260 static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
261 {
262 if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
263 cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
264 return -EINVAL;
265
266 return 0;
267 }
268
269 /* Start of ib callback functions */
270
usnic_ib_port_link_layer(struct ib_device * device,u32 port_num)271 enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
272 u32 port_num)
273 {
274 return IB_LINK_LAYER_ETHERNET;
275 }
276
usnic_ib_query_device(struct ib_device * ibdev,struct ib_device_attr * props,struct ib_udata * uhw)277 int usnic_ib_query_device(struct ib_device *ibdev,
278 struct ib_device_attr *props,
279 struct ib_udata *uhw)
280 {
281 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
282 union ib_gid gid;
283 struct ethtool_drvinfo info;
284 int qp_per_vf;
285
286 usnic_dbg("\n");
287 if (uhw->inlen || uhw->outlen)
288 return -EINVAL;
289
290 mutex_lock(&us_ibdev->usdev_lock);
291 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
292 memset(props, 0, sizeof(*props));
293 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
294 &gid.raw[0]);
295 memcpy(&props->sys_image_guid, &gid.global.interface_id,
296 sizeof(gid.global.interface_id));
297 usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
298 props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
299 props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
300 props->vendor_id = PCI_VENDOR_ID_CISCO;
301 props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
302 props->hw_ver = us_ibdev->pdev->subsystem_device;
303 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
304 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
305 props->max_qp = qp_per_vf *
306 kref_read(&us_ibdev->vf_cnt);
307 props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
308 IB_DEVICE_SYS_IMAGE_GUID;
309 props->kernel_cap_flags = IBK_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,u32 port,struct ib_port_attr * props)335 int 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 * 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,u32 port,int index,union ib_gid * gid)423 int 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
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
446 pd->umem_pd = usnic_uiom_alloc_pd(ibpd->device->dev.parent);
447 if (IS_ERR(pd->umem_pd))
448 return PTR_ERR(pd->umem_pd);
449
450 return 0;
451 }
452
usnic_ib_dealloc_pd(struct ib_pd * pd,struct ib_udata * udata)453 int usnic_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
454 {
455 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
456 return 0;
457 }
458
usnic_ib_create_qp(struct ib_qp * ibqp,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)459 int usnic_ib_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
460 struct ib_udata *udata)
461 {
462 int err;
463 struct usnic_ib_dev *us_ibdev;
464 struct usnic_ib_qp_grp *qp_grp = to_uqp_grp(ibqp);
465 struct usnic_ib_ucontext *ucontext = rdma_udata_to_drv_context(
466 udata, struct usnic_ib_ucontext, ibucontext);
467 int cq_cnt;
468 struct usnic_vnic_res_spec res_spec;
469 struct usnic_ib_create_qp_cmd cmd;
470 struct usnic_transport_spec trans_spec;
471
472 usnic_dbg("\n");
473
474 us_ibdev = to_usdev(ibqp->device);
475
476 if (init_attr->create_flags)
477 return -EOPNOTSUPP;
478
479 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
480 if (err) {
481 usnic_err("%s: cannot copy udata for create_qp\n",
482 dev_name(&us_ibdev->ib_dev.dev));
483 return -EINVAL;
484 }
485
486 err = create_qp_validate_user_data(cmd);
487 if (err) {
488 usnic_err("%s: Failed to validate user data\n",
489 dev_name(&us_ibdev->ib_dev.dev));
490 return -EINVAL;
491 }
492
493 if (init_attr->qp_type != IB_QPT_UD) {
494 usnic_err("%s asked to make a non-UD QP: %d\n",
495 dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type);
496 return -EOPNOTSUPP;
497 }
498
499 trans_spec = cmd.spec;
500 mutex_lock(&us_ibdev->usdev_lock);
501 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
502 res_spec = min_transport_spec[trans_spec.trans_type];
503 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
504 err = find_free_vf_and_create_qp_grp(ibqp, &trans_spec, &res_spec);
505 if (err)
506 goto out_release_mutex;
507
508 err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
509 if (err) {
510 err = -EBUSY;
511 goto out_release_qp_grp;
512 }
513
514 qp_grp->ctx = ucontext;
515 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
516 usnic_ib_log_vf(qp_grp->vf);
517 mutex_unlock(&us_ibdev->usdev_lock);
518 return 0;
519
520 out_release_qp_grp:
521 qp_grp_destroy(qp_grp);
522 out_release_mutex:
523 mutex_unlock(&us_ibdev->usdev_lock);
524 return err;
525 }
526
usnic_ib_destroy_qp(struct ib_qp * qp,struct ib_udata * udata)527 int usnic_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
528 {
529 struct usnic_ib_qp_grp *qp_grp;
530 struct usnic_ib_vf *vf;
531
532 usnic_dbg("\n");
533
534 qp_grp = to_uqp_grp(qp);
535 vf = qp_grp->vf;
536 mutex_lock(&vf->pf->usdev_lock);
537 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
538 usnic_err("Failed to move qp grp %u to reset\n",
539 qp_grp->grp_id);
540 }
541
542 list_del(&qp_grp->link);
543 qp_grp_destroy(qp_grp);
544 mutex_unlock(&vf->pf->usdev_lock);
545
546 return 0;
547 }
548
usnic_ib_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)549 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
550 int attr_mask, struct ib_udata *udata)
551 {
552 struct usnic_ib_qp_grp *qp_grp;
553 int status;
554 usnic_dbg("\n");
555
556 if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
557 return -EOPNOTSUPP;
558
559 qp_grp = to_uqp_grp(ibqp);
560
561 mutex_lock(&qp_grp->vf->pf->usdev_lock);
562 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
563 /* usnic devices only have one port */
564 status = -EINVAL;
565 goto out_unlock;
566 }
567 if (attr_mask & IB_QP_STATE) {
568 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
569 } else {
570 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
571 status = -EINVAL;
572 }
573
574 out_unlock:
575 mutex_unlock(&qp_grp->vf->pf->usdev_lock);
576 return status;
577 }
578
usnic_ib_create_cq(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct uverbs_attr_bundle * attrs)579 int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
580 struct uverbs_attr_bundle *attrs)
581 {
582 if (attr->flags)
583 return -EOPNOTSUPP;
584
585 return 0;
586 }
587
usnic_ib_destroy_cq(struct ib_cq * cq,struct ib_udata * udata)588 int usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
589 {
590 return 0;
591 }
592
usnic_ib_reg_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt_addr,int access_flags,struct ib_udata * udata)593 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
594 u64 virt_addr, int access_flags,
595 struct ib_udata *udata)
596 {
597 struct usnic_ib_mr *mr;
598 int err;
599
600 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
601 virt_addr, length);
602
603 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
604 if (!mr)
605 return ERR_PTR(-ENOMEM);
606
607 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
608 access_flags, 0);
609 if (IS_ERR_OR_NULL(mr->umem)) {
610 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
611 goto err_free;
612 }
613
614 mr->ibmr.lkey = mr->ibmr.rkey = 0;
615 return &mr->ibmr;
616
617 err_free:
618 kfree(mr);
619 return ERR_PTR(err);
620 }
621
usnic_ib_dereg_mr(struct ib_mr * ibmr,struct ib_udata * udata)622 int usnic_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
623 {
624 struct usnic_ib_mr *mr = to_umr(ibmr);
625
626 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
627
628 usnic_uiom_reg_release(mr->umem);
629 kfree(mr);
630 return 0;
631 }
632
usnic_ib_alloc_ucontext(struct ib_ucontext * uctx,struct ib_udata * udata)633 int usnic_ib_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
634 {
635 struct ib_device *ibdev = uctx->device;
636 struct usnic_ib_ucontext *context = to_ucontext(uctx);
637 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
638 usnic_dbg("\n");
639
640 INIT_LIST_HEAD(&context->qp_grp_list);
641 mutex_lock(&us_ibdev->usdev_lock);
642 list_add_tail(&context->link, &us_ibdev->ctx_list);
643 mutex_unlock(&us_ibdev->usdev_lock);
644
645 return 0;
646 }
647
usnic_ib_dealloc_ucontext(struct ib_ucontext * ibcontext)648 void usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
649 {
650 struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
651 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
652 usnic_dbg("\n");
653
654 mutex_lock(&us_ibdev->usdev_lock);
655 WARN_ON_ONCE(!list_empty(&context->qp_grp_list));
656 list_del(&context->link);
657 mutex_unlock(&us_ibdev->usdev_lock);
658 }
659
usnic_ib_mmap(struct ib_ucontext * context,struct vm_area_struct * vma)660 int usnic_ib_mmap(struct ib_ucontext *context,
661 struct vm_area_struct *vma)
662 {
663 struct usnic_ib_ucontext *uctx = to_ucontext(context);
664 struct usnic_ib_dev *us_ibdev;
665 struct usnic_ib_qp_grp *qp_grp;
666 struct usnic_ib_vf *vf;
667 struct vnic_dev_bar *bar;
668 dma_addr_t bus_addr;
669 unsigned int len;
670 unsigned int vfid;
671
672 usnic_dbg("\n");
673
674 us_ibdev = to_usdev(context->device);
675 vm_flags_set(vma, VM_IO);
676 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
677 vfid = vma->vm_pgoff;
678 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
679 vma->vm_pgoff, PAGE_SHIFT, vfid);
680
681 mutex_lock(&us_ibdev->usdev_lock);
682 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
683 vf = qp_grp->vf;
684 if (usnic_vnic_get_index(vf->vnic) == vfid) {
685 bar = usnic_vnic_get_bar(vf->vnic, 0);
686 if ((vma->vm_end - vma->vm_start) != bar->len) {
687 usnic_err("Bar0 Len %lu - Request map %lu\n",
688 bar->len,
689 vma->vm_end - vma->vm_start);
690 mutex_unlock(&us_ibdev->usdev_lock);
691 return -EINVAL;
692 }
693 bus_addr = bar->bus_addr;
694 len = bar->len;
695 usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
696 &bus_addr, bar->vaddr, bar->len);
697 mutex_unlock(&us_ibdev->usdev_lock);
698
699 return remap_pfn_range(vma,
700 vma->vm_start,
701 bus_addr >> PAGE_SHIFT,
702 len, vma->vm_page_prot);
703 }
704 }
705
706 mutex_unlock(&us_ibdev->usdev_lock);
707 usnic_err("No VF %u found\n", vfid);
708 return -EINVAL;
709 }
710