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IB/usnic: Handle 0 counts in resource allocation
[linux-block.git] / drivers / infiniband / hw / usnic / usnic_ib_verbs.c
CommitLineData
e3cf00d0
UM		 1/*
2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
3 *
3805eade
JS		 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.
e3cf00d0
UM		 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
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_fwd.h"
46#include "usnic_log.h"
47#include "usnic_uiom.h"
48#include "usnic_transport.h"
49
50#define USNIC_DEFAULT_TRANSPORT USNIC_TRANSPORT_ROCE_CUSTOM
51
52static void usnic_ib_fw_string_to_u64(char *fw_ver_str, u64 *fw_ver)
53{
3ea72861 54 *fw_ver = *((u64 *)fw_ver_str);
e3cf00d0
UM		 55}
56
57static int usnic_ib_fill_create_qp_resp(struct usnic_ib_qp_grp *qp_grp,
58 struct ib_udata *udata)
59{
60 struct usnic_ib_dev *us_ibdev;
61 struct usnic_ib_create_qp_resp resp;
62 struct pci_dev *pdev;
63 struct vnic_dev_bar *bar;
64 struct usnic_vnic_res_chunk *chunk;
8af94ac6 65 struct usnic_ib_qp_grp_flow *default_flow;
e3cf00d0
UM		 66 int i, err;
67
68 memset(&resp, 0, sizeof(resp));
69
70 us_ibdev = qp_grp->vf->pf;
71 pdev = usnic_vnic_get_pdev(qp_grp->vf->vnic);
72 if (!pdev) {
73 usnic_err("Failed to get pdev of qp_grp %d\n",
74 qp_grp->grp_id);
75 return -EFAULT;
76 }
77
78 bar = usnic_vnic_get_bar(qp_grp->vf->vnic, 0);
79 if (!bar) {
80 usnic_err("Failed to get bar0 of qp_grp %d vf %s",
81 qp_grp->grp_id, pci_name(pdev));
82 return -EFAULT;
83 }
84
85 resp.vfid = usnic_vnic_get_index(qp_grp->vf->vnic);
86 resp.bar_bus_addr = bar->bus_addr;
87 resp.bar_len = bar->len;
e3cf00d0
UM		 88
89 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_RQ);
90 if (IS_ERR_OR_NULL(chunk)) {
91 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
92 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_RQ),
93 qp_grp->grp_id,
94 PTR_ERR(chunk));
95 return chunk ? PTR_ERR(chunk) : -ENOMEM;
96 }
97
98 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_RQ);
99 resp.rq_cnt = chunk->cnt;
100 for (i = 0; i < chunk->cnt; i++)
101 resp.rq_idx[i] = chunk->res[i]->vnic_idx;
102
103 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_WQ);
104 if (IS_ERR_OR_NULL(chunk)) {
105 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
106 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_WQ),
107 qp_grp->grp_id,
108 PTR_ERR(chunk));
109 return chunk ? PTR_ERR(chunk) : -ENOMEM;
110 }
111
112 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_WQ);
113 resp.wq_cnt = chunk->cnt;
114 for (i = 0; i < chunk->cnt; i++)
115 resp.wq_idx[i] = chunk->res[i]->vnic_idx;
116
117 chunk = usnic_ib_qp_grp_get_chunk(qp_grp, USNIC_VNIC_RES_TYPE_CQ);
118 if (IS_ERR_OR_NULL(chunk)) {
119 usnic_err("Failed to get chunk %s for qp_grp %d with err %ld\n",
120 usnic_vnic_res_type_to_str(USNIC_VNIC_RES_TYPE_CQ),
121 qp_grp->grp_id,
122 PTR_ERR(chunk));
123 return chunk ? PTR_ERR(chunk) : -ENOMEM;
124 }
125
126 WARN_ON(chunk->type != USNIC_VNIC_RES_TYPE_CQ);
127 resp.cq_cnt = chunk->cnt;
128 for (i = 0; i < chunk->cnt; i++)
129 resp.cq_idx[i] = chunk->res[i]->vnic_idx;
130
8af94ac6
UM		 131 default_flow = list_first_entry(&qp_grp->flows_lst,
132 struct usnic_ib_qp_grp_flow, link);
133 resp.transport = default_flow->trans_type;
134
e3cf00d0
UM		 135 err = ib_copy_to_udata(udata, &resp, sizeof(resp));
136 if (err) {
137 usnic_err("Failed to copy udata for %s", us_ibdev->ib_dev.name);
138 return err;
139 }
140
141 return 0;
142}
143
144static struct usnic_ib_qp_grp*
145find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
146 struct usnic_ib_pd *pd,
8af94ac6 147 struct usnic_transport_spec *trans_spec,
e3cf00d0
UM		 148 struct usnic_vnic_res_spec *res_spec)
149{
150 struct usnic_ib_vf *vf;
151 struct usnic_vnic *vnic;
152 struct usnic_ib_qp_grp *qp_grp;
153 struct device *dev, **dev_list;
154 int i, found = 0;
155
156 BUG_ON(!mutex_is_locked(&us_ibdev->usdev_lock));
157
158 if (list_empty(&us_ibdev->vf_dev_list)) {
159 usnic_info("No vfs to allocate\n");
160 return NULL;
161 }
162
e3cf00d0
UM		 163 if (usnic_ib_share_vf) {
164 /* Try to find resouces on a used vf which is in pd */
165 dev_list = usnic_uiom_get_dev_list(pd->umem_pd);
166 for (i = 0; dev_list[i]; i++) {
167 dev = dev_list[i];
168 vf = pci_get_drvdata(to_pci_dev(dev));
169 spin_lock(&vf->lock);
170 vnic = vf->vnic;
171 if (!usnic_vnic_check_room(vnic, res_spec)) {
172 usnic_dbg("Found used vnic %s from %s\n",
173 us_ibdev->ib_dev.name,
174 pci_name(usnic_vnic_get_pdev(
175 vnic)));
176 found = 1;
177 break;
178 }
179 spin_unlock(&vf->lock);
180
181 }
182 usnic_uiom_free_dev_list(dev_list);
183 }
184
185 if (!found) {
186 /* Try to find resources on an unused vf */
187 list_for_each_entry(vf, &us_ibdev->vf_dev_list, link) {
188 spin_lock(&vf->lock);
189 vnic = vf->vnic;
190 if (vf->qp_grp_ref_cnt == 0 &&
191 usnic_vnic_check_room(vnic, res_spec) == 0) {
192 found = 1;
193 break;
194 }
195 spin_unlock(&vf->lock);
196 }
197 }
198
199 if (!found) {
200 usnic_info("No free qp grp found on %s\n",
201 us_ibdev->ib_dev.name);
202 return ERR_PTR(-ENOMEM);
203 }
204
205 qp_grp = usnic_ib_qp_grp_create(us_ibdev->ufdev, vf, pd, res_spec,
8af94ac6 206 trans_spec);
e3cf00d0
UM		 207 spin_unlock(&vf->lock);
208 if (IS_ERR_OR_NULL(qp_grp)) {
209 usnic_err("Failed to allocate qp_grp\n");
210 return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
211 }
212
213 return qp_grp;
214}
215
216static void qp_grp_destroy(struct usnic_ib_qp_grp *qp_grp)
217{
218 struct usnic_ib_vf *vf = qp_grp->vf;
219
220 WARN_ON(qp_grp->state != IB_QPS_RESET);
221
222 spin_lock(&vf->lock);
223 usnic_ib_qp_grp_destroy(qp_grp);
224 spin_unlock(&vf->lock);
225}
226
227static void eth_speed_to_ib_speed(int speed, u8 *active_speed,
228 u8 *active_width)
229{
230 if (speed <= 10000) {
231 *active_width = IB_WIDTH_1X;
232 *active_speed = IB_SPEED_FDR10;
233 } else if (speed <= 20000) {
234 *active_width = IB_WIDTH_4X;
235 *active_speed = IB_SPEED_DDR;
236 } else if (speed <= 30000) {
237 *active_width = IB_WIDTH_4X;
238 *active_speed = IB_SPEED_QDR;
239 } else if (speed <= 40000) {
240 *active_width = IB_WIDTH_4X;
241 *active_speed = IB_SPEED_FDR10;
242 } else {
243 *active_width = IB_WIDTH_4X;
244 *active_speed = IB_SPEED_EDR;
245 }
246}
247
c7845bca
UM		 248static int create_qp_validate_user_data(struct usnic_ib_create_qp_cmd cmd)
249{
250 if (cmd.spec.trans_type <= USNIC_TRANSPORT_UNKNOWN ||
251 cmd.spec.trans_type >= USNIC_TRANSPORT_MAX)
252 return -EINVAL;
253
254 return 0;
255}
256
e3cf00d0
UM		 257/* Start of ib callback functions */
258
259enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
260 u8 port_num)
261{
262 return IB_LINK_LAYER_ETHERNET;
263}
264
265int usnic_ib_query_device(struct ib_device *ibdev,
2528e33e
MB		 266 struct ib_device_attr *props,
267 struct ib_udata *uhw)
e3cf00d0
UM		 268{
269 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
270 union ib_gid gid;
271 struct ethtool_drvinfo info;
272 struct ethtool_cmd cmd;
273 int qp_per_vf;
274
275 usnic_dbg("\n");
2528e33e
MB		 276 if (uhw->inlen || uhw->outlen)
277 return -EINVAL;
278
e3cf00d0
UM		 279 mutex_lock(&us_ibdev->usdev_lock);
280 us_ibdev->netdev->ethtool_ops->get_drvinfo(us_ibdev->netdev, &info);
281 us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
282 memset(props, 0, sizeof(*props));
c7845bca
UM		 283 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
284 &gid.raw[0]);
e3cf00d0
UM		 285 memcpy(&props->sys_image_guid, &gid.global.interface_id,
286 sizeof(gid.global.interface_id));
287 usnic_ib_fw_string_to_u64(&info.fw_version[0], &props->fw_ver);
288 props->max_mr_size = USNIC_UIOM_MAX_MR_SIZE;
289 props->page_size_cap = USNIC_UIOM_PAGE_SIZE;
290 props->vendor_id = PCI_VENDOR_ID_CISCO;
291 props->vendor_part_id = PCI_DEVICE_ID_CISCO_VIC_USPACE_NIC;
292 props->hw_ver = us_ibdev->pdev->subsystem_device;
293 qp_per_vf = max(us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_WQ],
294 us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_RQ]);
295 props->max_qp = qp_per_vf *
296 atomic_read(&us_ibdev->vf_cnt.refcount);
297 props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
298 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_BLOCK_MULTICAST_LOOPBACK;
299 props->max_cq = us_ibdev->vf_res_cnt[USNIC_VNIC_RES_TYPE_CQ] *
300 atomic_read(&us_ibdev->vf_cnt.refcount);
301 props->max_pd = USNIC_UIOM_MAX_PD_CNT;
302 props->max_mr = USNIC_UIOM_MAX_MR_CNT;
303 props->local_ca_ack_delay = 0;
304 props->max_pkeys = 0;
305 props->atomic_cap = IB_ATOMIC_NONE;
306 props->masked_atomic_cap = props->atomic_cap;
307 props->max_qp_rd_atom = 0;
308 props->max_qp_init_rd_atom = 0;
309 props->max_res_rd_atom = 0;
310 props->max_srq = 0;
311 props->max_srq_wr = 0;
312 props->max_srq_sge = 0;
313 props->max_fast_reg_page_list_len = 0;
314 props->max_mcast_grp = 0;
315 props->max_mcast_qp_attach = 0;
316 props->max_total_mcast_qp_attach = 0;
317 props->max_map_per_fmr = 0;
318 /* Owned by Userspace
319 * max_qp_wr, max_sge, max_sge_rd, max_cqe */
320 mutex_unlock(&us_ibdev->usdev_lock);
321
322 return 0;
323}
324
325int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
326 struct ib_port_attr *props)
327{
328 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
329 struct ethtool_cmd cmd;
330
331 usnic_dbg("\n");
332
333 mutex_lock(&us_ibdev->usdev_lock);
334 us_ibdev->netdev->ethtool_ops->get_settings(us_ibdev->netdev, &cmd);
335 memset(props, 0, sizeof(*props));
336
337 props->lid = 0;
338 props->lmc = 1;
339 props->sm_lid = 0;
340 props->sm_sl = 0;
341
c7845bca 342 if (!us_ibdev->ufdev->link_up) {
e3cf00d0
UM		 343 props->state = IB_PORT_DOWN;
344 props->phys_state = 3;
c7845bca
UM		 345 } else if (!us_ibdev->ufdev->inaddr) {
346 props->state = IB_PORT_INIT;
347 props->phys_state = 4;
348 } else {
349 props->state = IB_PORT_ACTIVE;
350 props->phys_state = 5;
e3cf00d0
UM		 351 }
352
353 props->port_cap_flags = 0;
354 props->gid_tbl_len = 1;
355 props->pkey_tbl_len = 1;
356 props->bad_pkey_cntr = 0;
357 props->qkey_viol_cntr = 0;
358 eth_speed_to_ib_speed(cmd.speed, &props->active_speed,
359 &props->active_width);
360 props->max_mtu = IB_MTU_4096;
8af94ac6 361 props->active_mtu = iboe_get_mtu(us_ibdev->ufdev->mtu);
e3cf00d0 362 /* Userspace will adjust for hdrs */
8af94ac6 363 props->max_msg_sz = us_ibdev->ufdev->mtu;
e3cf00d0
UM		 364 props->max_vl_num = 1;
365 mutex_unlock(&us_ibdev->usdev_lock);
366
367 return 0;
368}
369
370int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
371 int qp_attr_mask,
372 struct ib_qp_init_attr *qp_init_attr)
373{
374 struct usnic_ib_qp_grp *qp_grp;
375 struct usnic_ib_vf *vf;
376 int err;
377
378 usnic_dbg("\n");
379
380 memset(qp_attr, 0, sizeof(*qp_attr));
381 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
382
383 qp_grp = to_uqp_grp(qp);
384 vf = qp_grp->vf;
385 mutex_lock(&vf->pf->usdev_lock);
386 usnic_dbg("\n");
387 qp_attr->qp_state = qp_grp->state;
388 qp_attr->cur_qp_state = qp_grp->state;
389
390 switch (qp_grp->ibqp.qp_type) {
391 case IB_QPT_UD:
392 qp_attr->qkey = 0;
393 break;
394 default:
395 usnic_err("Unexpected qp_type %d\n", qp_grp->ibqp.qp_type);
396 err = -EINVAL;
397 goto err_out;
398 }
399
400 mutex_unlock(&vf->pf->usdev_lock);
401 return 0;
402
403err_out:
404 mutex_unlock(&vf->pf->usdev_lock);
405 return err;
406}
407
408int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
409 union ib_gid *gid)
410{
411
412 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
413 usnic_dbg("\n");
414
415 if (index > 1)
416 return -EINVAL;
417
418 mutex_lock(&us_ibdev->usdev_lock);
419 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
c7845bca
UM		 420 usnic_mac_ip_to_gid(us_ibdev->ufdev->mac, us_ibdev->ufdev->inaddr,
421 &gid->raw[0]);
e3cf00d0
UM		 422 mutex_unlock(&us_ibdev->usdev_lock);
423
424 return 0;
425}
426
427int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
428 u16 *pkey)
429{
430 if (index > 1)
431 return -EINVAL;
432
433 *pkey = 0xffff;
434 return 0;
435}
436
437struct ib_pd *usnic_ib_alloc_pd(struct ib_device *ibdev,
438 struct ib_ucontext *context,
439 struct ib_udata *udata)
440{
441 struct usnic_ib_pd *pd;
442 void *umem_pd;
443
444 usnic_dbg("\n");
445
446 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
447 if (!pd)
448 return ERR_PTR(-ENOMEM);
449
450 umem_pd = pd->umem_pd = usnic_uiom_alloc_pd();
451 if (IS_ERR_OR_NULL(umem_pd)) {
452 kfree(pd);
453 return ERR_PTR(umem_pd ? PTR_ERR(umem_pd) : -ENOMEM);
454 }
455
456 usnic_info("domain 0x%p allocated for context 0x%p and device %s\n",
457 pd, context, ibdev->name);
458 return &pd->ibpd;
459}
460
461int usnic_ib_dealloc_pd(struct ib_pd *pd)
462{
463 usnic_info("freeing domain 0x%p\n", pd);
464
465 usnic_uiom_dealloc_pd((to_upd(pd))->umem_pd);
466 kfree(pd);
467 return 0;
468}
469
470struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
471 struct ib_qp_init_attr *init_attr,
472 struct ib_udata *udata)
473{
474 int err;
475 struct usnic_ib_dev *us_ibdev;
476 struct usnic_ib_qp_grp *qp_grp;
477 struct usnic_ib_ucontext *ucontext;
478 int cq_cnt;
479 struct usnic_vnic_res_spec res_spec;
c7845bca 480 struct usnic_ib_create_qp_cmd cmd;
8af94ac6 481 struct usnic_transport_spec trans_spec;
e3cf00d0
UM		 482
483 usnic_dbg("\n");
484
485 ucontext = to_uucontext(pd->uobject->context);
486 us_ibdev = to_usdev(pd->device);
487
60093dc0
OG		 488 if (init_attr->create_flags)
489 return ERR_PTR(-EINVAL);
490
c7845bca
UM		 491 err = ib_copy_from_udata(&cmd, udata, sizeof(cmd));
492 if (err) {
493 usnic_err("%s: cannot copy udata for create_qp\n",
494 us_ibdev->ib_dev.name);
495 return ERR_PTR(-EINVAL);
496 }
497
498 err = create_qp_validate_user_data(cmd);
499 if (err) {
500 usnic_err("%s: Failed to validate user data\n",
501 us_ibdev->ib_dev.name);
502 return ERR_PTR(-EINVAL);
503 }
504
e3cf00d0
UM		 505 if (init_attr->qp_type != IB_QPT_UD) {
506 usnic_err("%s asked to make a non-UD QP: %d\n",
507 us_ibdev->ib_dev.name, init_attr->qp_type);
508 return ERR_PTR(-EINVAL);
509 }
510
c7845bca 511 trans_spec = cmd.spec;
e3cf00d0 512 mutex_lock(&us_ibdev->usdev_lock);
8af94ac6
UM		 513 cq_cnt = (init_attr->send_cq == init_attr->recv_cq) ? 1 : 2;
514 res_spec = min_transport_spec[trans_spec.trans_type];
e3cf00d0
UM		 515 usnic_vnic_res_spec_update(&res_spec, USNIC_VNIC_RES_TYPE_CQ, cq_cnt);
516 qp_grp = find_free_vf_and_create_qp_grp(us_ibdev, to_upd(pd),
8af94ac6 517 &trans_spec,
e3cf00d0
UM		 518 &res_spec);
519 if (IS_ERR_OR_NULL(qp_grp)) {
6a54d9f9 520 err = qp_grp ? PTR_ERR(qp_grp) : -ENOMEM;
e3cf00d0
UM		 521 goto out_release_mutex;
522 }
523
524 err = usnic_ib_fill_create_qp_resp(qp_grp, udata);
525 if (err) {
526 err = -EBUSY;
527 goto out_release_qp_grp;
528 }
529
530 qp_grp->ctx = ucontext;
531 list_add_tail(&qp_grp->link, &ucontext->qp_grp_list);
532 usnic_ib_log_vf(qp_grp->vf);
533 mutex_unlock(&us_ibdev->usdev_lock);
534 return &qp_grp->ibqp;
535
536out_release_qp_grp:
537 qp_grp_destroy(qp_grp);
538out_release_mutex:
539 mutex_unlock(&us_ibdev->usdev_lock);
540 return ERR_PTR(err);
541}
542
543int usnic_ib_destroy_qp(struct ib_qp *qp)
544{
545 struct usnic_ib_qp_grp *qp_grp;
546 struct usnic_ib_vf *vf;
547
548 usnic_dbg("\n");
549
550 qp_grp = to_uqp_grp(qp);
551 vf = qp_grp->vf;
552 mutex_lock(&vf->pf->usdev_lock);
553 if (usnic_ib_qp_grp_modify(qp_grp, IB_QPS_RESET, NULL)) {
554 usnic_err("Failed to move qp grp %u to reset\n",
555 qp_grp->grp_id);
556 }
557
558 list_del(&qp_grp->link);
559 qp_grp_destroy(qp_grp);
560 mutex_unlock(&vf->pf->usdev_lock);
561
562 return 0;
563}
564
565int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
566 int attr_mask, struct ib_udata *udata)
567{
568 struct usnic_ib_qp_grp *qp_grp;
569 int status;
570 usnic_dbg("\n");
571
572 qp_grp = to_uqp_grp(ibqp);
573
e3cf00d0 574 mutex_lock(&qp_grp->vf->pf->usdev_lock);
89e5323c
NE		 575 if ((attr_mask & IB_QP_PORT) && attr->port_num != 1) {
576 /* usnic devices only have one port */
577 status = -EINVAL;
578 goto out_unlock;
579 }
580 if (attr_mask & IB_QP_STATE) {
581 status = usnic_ib_qp_grp_modify(qp_grp, attr->qp_state, NULL);
e3cf00d0 582 } else {
89e5323c 583 usnic_err("Unhandled request, attr_mask=0x%x\n", attr_mask);
e3cf00d0
UM		 584 status = -EINVAL;
585 }
586
89e5323c 587out_unlock:
e3cf00d0
UM		 588 mutex_unlock(&qp_grp->vf->pf->usdev_lock);
589 return status;
590}
591
bcf4c1ea
MB		 592struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
593 const struct ib_cq_init_attr *attr,
594 struct ib_ucontext *context,
595 struct ib_udata *udata)
e3cf00d0
UM		 596{
597 struct ib_cq *cq;
598
599 usnic_dbg("\n");
bcf4c1ea
MB		 600 if (attr->flags)
601 return ERR_PTR(-EINVAL);
602
e3cf00d0
UM		 603 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
604 if (!cq)
605 return ERR_PTR(-EBUSY);
606
607 return cq;
608}
609
610int usnic_ib_destroy_cq(struct ib_cq *cq)
611{
612 usnic_dbg("\n");
613 kfree(cq);
614 return 0;
615}
616
617struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
618 u64 virt_addr, int access_flags,
619 struct ib_udata *udata)
620{
621 struct usnic_ib_mr *mr;
622 int err;
623
624 usnic_dbg("start 0x%llx va 0x%llx length 0x%llx\n", start,
625 virt_addr, length);
626
627 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
628 if (IS_ERR_OR_NULL(mr))
629 return ERR_PTR(mr ? PTR_ERR(mr) : -ENOMEM);
630
631 mr->umem = usnic_uiom_reg_get(to_upd(pd)->umem_pd, start, length,
632 access_flags, 0);
633 if (IS_ERR_OR_NULL(mr->umem)) {
6a54d9f9 634 err = mr->umem ? PTR_ERR(mr->umem) : -EFAULT;
e3cf00d0
UM		 635 goto err_free;
636 }
637
638 mr->ibmr.lkey = mr->ibmr.rkey = 0;
639 return &mr->ibmr;
640
641err_free:
642 kfree(mr);
643 return ERR_PTR(err);
644}
645
646int usnic_ib_dereg_mr(struct ib_mr *ibmr)
647{
648 struct usnic_ib_mr *mr = to_umr(ibmr);
649
650 usnic_dbg("va 0x%lx length 0x%zx\n", mr->umem->va, mr->umem->length);
651
652 usnic_uiom_reg_release(mr->umem, ibmr->pd->uobject->context->closing);
653 kfree(mr);
654 return 0;
655}
656
657struct ib_ucontext *usnic_ib_alloc_ucontext(struct ib_device *ibdev,
658 struct ib_udata *udata)
659{
660 struct usnic_ib_ucontext *context;
661 struct usnic_ib_dev *us_ibdev = to_usdev(ibdev);
662 usnic_dbg("\n");
663
664 context = kmalloc(sizeof(*context), GFP_KERNEL);
665 if (!context)
666 return ERR_PTR(-ENOMEM);
667
668 INIT_LIST_HEAD(&context->qp_grp_list);
669 mutex_lock(&us_ibdev->usdev_lock);
670 list_add_tail(&context->link, &us_ibdev->ctx_list);
671 mutex_unlock(&us_ibdev->usdev_lock);
672
673 return &context->ibucontext;
674}
675
676int usnic_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
677{
678 struct usnic_ib_ucontext *context = to_uucontext(ibcontext);
679 struct usnic_ib_dev *us_ibdev = to_usdev(ibcontext->device);
680 usnic_dbg("\n");
681
682 mutex_lock(&us_ibdev->usdev_lock);
683 BUG_ON(!list_empty(&context->qp_grp_list));
684 list_del(&context->link);
685 mutex_unlock(&us_ibdev->usdev_lock);
686 kfree(context);
687 return 0;
688}
689
690int usnic_ib_mmap(struct ib_ucontext *context,
691 struct vm_area_struct *vma)
692{
693 struct usnic_ib_ucontext *uctx = to_ucontext(context);
694 struct usnic_ib_dev *us_ibdev;
695 struct usnic_ib_qp_grp *qp_grp;
696 struct usnic_ib_vf *vf;
697 struct vnic_dev_bar *bar;
698 dma_addr_t bus_addr;
699 unsigned int len;
700 unsigned int vfid;
701
702 usnic_dbg("\n");
703
704 us_ibdev = to_usdev(context->device);
705 vma->vm_flags |= VM_IO;
706 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
707 vfid = vma->vm_pgoff;
708 usnic_dbg("Page Offset %lu PAGE_SHIFT %u VFID %u\n",
709 vma->vm_pgoff, PAGE_SHIFT, vfid);
710
711 mutex_lock(&us_ibdev->usdev_lock);
712 list_for_each_entry(qp_grp, &uctx->qp_grp_list, link) {
713 vf = qp_grp->vf;
714 if (usnic_vnic_get_index(vf->vnic) == vfid) {
715 bar = usnic_vnic_get_bar(vf->vnic, 0);
716 if ((vma->vm_end - vma->vm_start) != bar->len) {
717 usnic_err("Bar0 Len %lu - Request map %lu\n",
718 bar->len,
719 vma->vm_end - vma->vm_start);
720 mutex_unlock(&us_ibdev->usdev_lock);
721 return -EINVAL;
722 }
723 bus_addr = bar->bus_addr;
724 len = bar->len;
725 usnic_dbg("bus: %pa vaddr: %p size: %ld\n",
726 &bus_addr, bar->vaddr, bar->len);
727 mutex_unlock(&us_ibdev->usdev_lock);
728
729 return remap_pfn_range(vma,
730 vma->vm_start,
731 bus_addr >> PAGE_SHIFT,
732 len, vma->vm_page_prot);
733 }
734 }
735
736 mutex_unlock(&us_ibdev->usdev_lock);
737 usnic_err("No VF %u found\n", vfid);
738 return -EINVAL;
739}
740
741/* In ib callbacks section - Start of stub funcs */
742struct ib_ah *usnic_ib_create_ah(struct ib_pd *pd,
743 struct ib_ah_attr *ah_attr)
744{
745 usnic_dbg("\n");
746 return ERR_PTR(-EPERM);
747}
748
749int usnic_ib_destroy_ah(struct ib_ah *ah)
750{
751 usnic_dbg("\n");
752 return -EINVAL;
753}
754
755int usnic_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
756 struct ib_send_wr **bad_wr)
757{
758 usnic_dbg("\n");
759 return -EINVAL;
760}
761
762int usnic_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
763 struct ib_recv_wr **bad_wr)
764{
765 usnic_dbg("\n");
766 return -EINVAL;
767}
768
769int usnic_ib_poll_cq(struct ib_cq *ibcq, int num_entries,
770 struct ib_wc *wc)
771{
772 usnic_dbg("\n");
773 return -EINVAL;
774}
775
776int usnic_ib_req_notify_cq(struct ib_cq *cq,
777 enum ib_cq_notify_flags flags)
778{
779 usnic_dbg("\n");
780 return -EINVAL;
781}
782
783struct ib_mr *usnic_ib_get_dma_mr(struct ib_pd *pd, int acc)
784{
785 usnic_dbg("\n");
786 return ERR_PTR(-ENOMEM);
787}
788
789
790/* In ib callbacks section - End of stub funcs */
791/* End of ib callbacks section */
Linux 6.x block layer and io_uring tree(s)