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 props->max_map_per_fmr = 0;
329 /* Owned by Userspace
330 * max_qp_wr, max_sge, max_sge_rd, max_cqe */
331 mutex_unlock(&us_ibdev->usdev_lock);
332
333 return 0;
334 }
335
usnic_ib_query_port(struct ib_device * ibdev,u8 port,struct ib_port_attr * props)336 int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
337 struct ib_port_attr *props)
338 {
339 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
340
341 usnic_dbg("\n");
342
343 if (ib_get_eth_speed(ibdev, port, &props->active_speed,
344 &props->active_width))
345 return -EINVAL;
346
347 /*
348 * usdev_lock is acquired after (and not before) ib_get_eth_speed call
349 * because acquiring rtnl_lock in ib_get_eth_speed, while holding
350 * usdev_lock could lead to a deadlock.
351 */
352 mutex_lock(&us_ibdev->usdev_lock);
353 /* props being zeroed by the caller, avoid zeroing it here */
354
355 props->lid = 0;
356 props->lmc = 1;
357 props->sm_lid = 0;
358 props->sm_sl = 0;
359
360 if (!us_ibdev->ufdev->link_up) {
361 props->state = IB_PORT_DOWN;
362 props->phys_state = IB_PORT_PHYS_STATE_DISABLED;
363 } else if (!us_ibdev->ufdev->inaddr) {
364 props->state = IB_PORT_INIT;
365 props->phys_state =
366 IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING;
367 } else {
368 props->state = IB_PORT_ACTIVE;
369 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
370 }
371
372 props->port_cap_flags = 0;
373 props->gid_tbl_len = 1;
374 props->pkey_tbl_len = 1;
375 props->bad_pkey_cntr = 0;
376 props->qkey_viol_cntr = 0;
377 props->max_mtu = IB_MTU_4096;
378 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
379 /* Userspace will adjust for hdrs */
380 props->max_msg_sz = us_ibdev->ufdev->mtu;
381 props->max_vl_num = 1;
382 mutex_unlock(&us_ibdev->usdev_lock);
383
384 return 0;
385 }
386
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)387 int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
388 int qp_attr_mask,
389 struct ib_qp_init_attr *qp_init_attr)
390 {
391 struct usnic_ib_qp_grp *qp_grp;
392 struct usnic_ib_vf *vf;
393 int err;
394
395 usnic_dbg("\n");
396
397 memset(qp_attr, 0, sizeof(*qp_attr));
398 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
399
400 qp_grp = to_uqp_grp(qp);
401 vf = qp_grp->vf;
402 mutex_lock(&vf->pf->usdev_lock);
403 usnic_dbg("\n");
404 qp_attr->qp_state = qp_grp->state;
405 qp_attr->cur_qp_state = qp_grp->state;
406
407 switch (qp_grp->ibqp.qp_type) {
408 case IB_QPT_UD:
409 qp_attr->qkey = 0;
410 break;
411 default:
412 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
413 err = -EINVAL;
414 goto err_out;
415 }
416
417 mutex_unlock(&vf->pf->usdev_lock);
418 return 0;
419
420 err_out:
421 mutex_unlock(&vf->pf->usdev_lock);
422 return err;
423 }
424
usnic_ib_query_gid(struct ib_device * ibdev,u8 port,int index,union ib_gid * gid)425 int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
426 union ib_gid *gid)
427 {
428
429 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
430 usnic_dbg("\n");
431
432 if (index > 1)
433 return -EINVAL;
434
435 mutex_lock(&us_ibdev->usdev_lock);
436 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
437 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
438 &gid->raw[0]);
439 mutex_unlock(&us_ibdev->usdev_lock);
440
441 return 0;
442 }
443
usnic_ib_query_pkey(struct ib_device * ibdev,u8 port,u16 index,u16 * pkey)444 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
445 u16 *pkey)
446 {
447 if (index > 0)
448 return -EINVAL;
449
450 *pkey = 0xffff;
451 return 0;
452 }
453
usnic_ib_alloc_pd(struct ib_pd * ibpd,struct ib_udata * udata)454 int usnic_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
455 {
456 struct usnic_ib_pd *pd = to_upd(ibpd);
457 void *umem_pd;
458
459 umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
460 if (IS_ERR_OR_NULL(umem_pd)) {
461 return umem_pd ? PTR_ERR(umem_pd) : -ENOMEM;
462 }
463
464 return 0;
465 }
466
usnic_ib_dealloc_pd(struct ib_pd * pd,struct ib_udata * udata)467 void usnic_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
468 {
469 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
470 }
471
usnic_ib_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * init_attr,struct ib_udata * udata)472 struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
473 struct ib_qp_init_attr *init_attr,
474 struct ib_udata *udata)
475 {
476 int err;
477 struct usnic_ib_dev *us_ibdev;
478 struct usnic_ib_qp_grp *qp_grp;
479 struct usnic_ib_ucontext *ucontext = rdma_udata_to_drv_context(
480 udata, struct usnic_ib_ucontext, ibucontext);
481 int cq_cnt;
482 struct usnic_vnic_res_spec res_spec;
483 struct usnic_ib_create_qp_cmd cmd;
484 struct usnic_transport_spec trans_spec;
485
486 usnic_dbg("\n");
487
488 us_ibdev = to_usdev(pd->device);
489
490 if (init_attr->create_flags)
491 return ERR_PTR(-EINVAL);
492
493 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
494 if (err) {
495 usnic_err("%s: cannot copy udata for create_qp\n",
496 dev_name(&us_ibdev->ib_dev.dev));
497 return ERR_PTR(-EINVAL);
498 }
499
500 err = create_qp_validate_user_data(cmd);
501 if (err) {
502 usnic_err("%s: Failed to validate user data\n",
503 dev_name(&us_ibdev->ib_dev.dev));
504 return ERR_PTR(-EINVAL);
505 }
506
507 if (init_attr->qp_type != IB_QPT_UD) {
508 usnic_err("%s asked to make a non-UD QP: %d\n",
509 dev_name(&us_ibdev->ib_dev.dev), init_attr->qp_type);
510 return ERR_PTR(-EINVAL);
511 }
512
513 trans_spec = cmd.spec;
514 mutex_lock(&us_ibdev->usdev_lock);
515 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
516 res_spec = min_transport_spec[trans_spec.trans_type];
517 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
518 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
519 &trans_spec,
520 &res_spec);
521 if (IS_ERR_OR_NULL(qp_grp)) {
522 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
523 goto out_release_mutex;
524 }
525
526 err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
527 if (err) {
528 err = -EBUSY;
529 goto out_release_qp_grp;
530 }
531
532 qp_grp->ctx = ucontext;
533 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
534 usnic_ib_log_vf(qp_grp->vf);
535 mutex_unlock(&us_ibdev->usdev_lock);
536 return &qp_grp->ibqp;
537
538 out_release_qp_grp:
539 qp_grp_destroy(qp_grp);
540 out_release_mutex:
541 mutex_unlock(&us_ibdev->usdev_lock);
542 return ERR_PTR(err);
543 }
544
usnic_ib_destroy_qp(struct ib_qp * qp,struct ib_udata * udata)545 int usnic_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
546 {
547 struct usnic_ib_qp_grp *qp_grp;
548 struct usnic_ib_vf *vf;
549
550 usnic_dbg("\n");
551
552 qp_grp = to_uqp_grp(qp);
553 vf = qp_grp->vf;
554 mutex_lock(&vf->pf->usdev_lock);
555 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
556 usnic_err("Failed to move qp grp %u to reset\n",
557 qp_grp->grp_id);
558 }
559
560 list_del(&qp_grp->link);
561 qp_grp_destroy(qp_grp);
562 mutex_unlock(&vf->pf->usdev_lock);
563
564 return 0;
565 }
566
usnic_ib_modify_qp(struct ib_qp * ibqp,struct ib_qp_attr * attr,int attr_mask,struct ib_udata * udata)567 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
568 int attr_mask, struct ib_udata *udata)
569 {
570 struct usnic_ib_qp_grp *qp_grp;
571 int status;
572 usnic_dbg("\n");
573
574 qp_grp = to_uqp_grp(ibqp);
575
576 mutex_lock(&qp_grp->vf->pf->usdev_lock);
577 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
578 /* usnic devices only have one port */
579 status = -EINVAL;
580 goto out_unlock;
581 }
582 if (attr_mask & IB_QP_STATE) {
583 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
584 } else {
585 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
586 status = -EINVAL;
587 }
588
589 out_unlock:
590 mutex_unlock(&qp_grp->vf->pf->usdev_lock);
591 return status;
592 }
593
usnic_ib_create_cq(struct ib_cq * ibcq,const struct ib_cq_init_attr * attr,struct ib_udata * udata)594 int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
595 struct ib_udata *udata)
596 {
597 if (attr->flags)
598 return -EINVAL;
599
600 return 0;
601 }
602
usnic_ib_destroy_cq(struct ib_cq * cq,struct ib_udata * udata)603 void usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
604 {
605 return;
606 }
607
usnic_ib_reg_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt_addr,int access_flags,struct ib_udata * udata)608 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
609 u64 virt_addr, int access_flags,
610 struct ib_udata *udata)
611 {
612 struct usnic_ib_mr *mr;
613 int err;
614
615 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
616 virt_addr, length);
617
618 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
619 if (!mr)
620 return ERR_PTR(-ENOMEM);
621
622 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
623 access_flags, 0);
624 if (IS_ERR_OR_NULL(mr->umem)) {
625 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
626 goto err_free;
627 }
628
629 mr->ibmr.lkey = mr->ibmr.rkey = 0;
630 return &mr->ibmr;
631
632 err_free:
633 kfree(mr);
634 return ERR_PTR(err);
635 }
636
usnic_ib_dereg_mr(struct ib_mr * ibmr,struct ib_udata * udata)637 int usnic_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
638 {
639 struct usnic_ib_mr *mr = to_umr(ibmr);
640
641 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
642
643 usnic_uiom_reg_release(mr->umem);
644 kfree(mr);
645 return 0;
646 }
647
usnic_ib_alloc_ucontext(struct ib_ucontext * uctx,struct ib_udata * udata)648 int usnic_ib_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
649 {
650 struct ib_device *ibdev = uctx->device;
651 struct usnic_ib_ucontext *context = to_ucontext(uctx);
652 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
653 usnic_dbg("\n");
654
655 INIT_LIST_HEAD(&context->qp_grp_list);
656 mutex_lock(&us_ibdev->usdev_lock);
657 list_add_tail(&context->link, &us_ibdev->ctx_list);
658 mutex_unlock(&us_ibdev->usdev_lock);
659
660 return 0;
661 }
662
usnic_ib_dealloc_ucontext(struct ib_ucontext * ibcontext)663 void usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
664 {
665 struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
666 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
667 usnic_dbg("\n");
668
669 mutex_lock(&us_ibdev->usdev_lock);
670 WARN_ON_ONCE(!list_empty(&context->qp_grp_list));
671 list_del(&context->link);
672 mutex_unlock(&us_ibdev->usdev_lock);
673 }
674
usnic_ib_mmap(struct ib_ucontext * context,struct vm_area_struct * vma)675 int usnic_ib_mmap(struct ib_ucontext *context,
676 struct vm_area_struct *vma)
677 {
678 struct usnic_ib_ucontext *uctx = to_ucontext(context);
679 struct usnic_ib_dev *us_ibdev;
680 struct usnic_ib_qp_grp *qp_grp;
681 struct usnic_ib_vf *vf;
682 struct vnic_dev_bar *bar;
683 dma_addr_t bus_addr;
684 unsigned int len;
685 unsigned int vfid;
686
687 usnic_dbg("\n");
688
689 us_ibdev = to_usdev(context->device);
690 vma->vm_flags |= VM_IO;
691 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
692 vfid = vma->vm_pgoff;
693 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
694 vma->vm_pgoff, PAGE_SHIFT, vfid);
695
696 mutex_lock(&us_ibdev->usdev_lock);
697 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
698 vf = qp_grp->vf;
699 if (usnic_vnic_get_index(vf->vnic) == vfid) {
700 bar = usnic_vnic_get_bar(vf->vnic, 0);
701 if ((vma->vm_end - vma->vm_start) != bar->len) {
702 usnic_err("Bar0 Len %lu - Request map %lu\n",
703 bar->len,
704 vma->vm_end - vma->vm_start);
705 mutex_unlock(&us_ibdev->usdev_lock);
706 return -EINVAL;
707 }
708 bus_addr = bar->bus_addr;
709 len = bar->len;
710 usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
711 &bus_addr, bar->vaddr, bar->len);
712 mutex_unlock(&us_ibdev->usdev_lock);
713
714 return remap_pfn_range(vma,
715 vma->vm_start,
716 bus_addr >> PAGE_SHIFT,
717 len, vma->vm_page_prot);
718 }
719 }
720
721 mutex_unlock(&us_ibdev->usdev_lock);
722 usnic_err("No VF %u found\n", vfid);
723 return -EINVAL;
724 }
725
726