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[mirror_ubuntu-artful-kernel.git] / drivers / infiniband / hw / bnxt_re / main.c
1 /*
2 * Broadcom NetXtreme-E RoCE driver.
3 *
4 * Copyright (c) 2016 - 2017, Broadcom. All rights reserved. The term
5 * Broadcom refers to Broadcom Limited and/or its subsidiaries.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the
22 * distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
26 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
31 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
33 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
34 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 *
36 * Description: Main component of the bnxt_re driver
37 */
38
39 #include <linux/module.h>
40 #include <linux/netdevice.h>
41 #include <linux/ethtool.h>
42 #include <linux/mutex.h>
43 #include <linux/list.h>
44 #include <linux/rculist.h>
45 #include <linux/spinlock.h>
46 #include <linux/pci.h>
47 #include <net/dcbnl.h>
48 #include <net/ipv6.h>
49 #include <net/addrconf.h>
50 #include <linux/if_ether.h>
51
52 #include <rdma/ib_verbs.h>
53 #include <rdma/ib_user_verbs.h>
54 #include <rdma/ib_umem.h>
55 #include <rdma/ib_addr.h>
56
57 #include "bnxt_ulp.h"
58 #include "roce_hsi.h"
59 #include "qplib_res.h"
60 #include "qplib_sp.h"
61 #include "qplib_fp.h"
62 #include "qplib_rcfw.h"
63 #include "bnxt_re.h"
64 #include "ib_verbs.h"
65 #include <rdma/bnxt_re-abi.h>
66 #include "bnxt.h"
67 static char version[] =
68 BNXT_RE_DESC " v" ROCE_DRV_MODULE_VERSION "\n";
69
70 MODULE_AUTHOR("Eddie Wai <eddie.wai@broadcom.com>");
71 MODULE_DESCRIPTION(BNXT_RE_DESC " Driver");
72 MODULE_LICENSE("Dual BSD/GPL");
73 MODULE_VERSION(ROCE_DRV_MODULE_VERSION);
74
75 /* globals */
76 static struct list_head bnxt_re_dev_list = LIST_HEAD_INIT(bnxt_re_dev_list);
77 /* Mutex to protect the list of bnxt_re devices added */
78 static DEFINE_MUTEX(bnxt_re_dev_lock);
79 static struct workqueue_struct *bnxt_re_wq;
80
81 /* for handling bnxt_en callbacks later */
82 static void bnxt_re_stop(void *p)
83 {
84 }
85
86 static void bnxt_re_start(void *p)
87 {
88 }
89
90 static void bnxt_re_sriov_config(void *p, int num_vfs)
91 {
92 }
93
94 static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
95 .ulp_async_notifier = NULL,
96 .ulp_stop = bnxt_re_stop,
97 .ulp_start = bnxt_re_start,
98 .ulp_sriov_config = bnxt_re_sriov_config
99 };
100
101 /* RoCE -> Net driver */
102
103 /* Driver registration routines used to let the networking driver (bnxt_en)
104 * to know that the RoCE driver is now installed
105 */
106 static int bnxt_re_unregister_netdev(struct bnxt_re_dev *rdev, bool lock_wait)
107 {
108 struct bnxt_en_dev *en_dev;
109 int rc;
110
111 if (!rdev)
112 return -EINVAL;
113
114 en_dev = rdev->en_dev;
115 /* Acquire rtnl lock if it is not invokded from netdev event */
116 if (lock_wait)
117 rtnl_lock();
118
119 rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev,
120 BNXT_ROCE_ULP);
121 if (lock_wait)
122 rtnl_unlock();
123 return rc;
124 }
125
126 static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev)
127 {
128 struct bnxt_en_dev *en_dev;
129 int rc = 0;
130
131 if (!rdev)
132 return -EINVAL;
133
134 en_dev = rdev->en_dev;
135
136 rtnl_lock();
137 rc = en_dev->en_ops->bnxt_register_device(en_dev, BNXT_ROCE_ULP,
138 &bnxt_re_ulp_ops, rdev);
139 rtnl_unlock();
140 return rc;
141 }
142
143 static int bnxt_re_free_msix(struct bnxt_re_dev *rdev, bool lock_wait)
144 {
145 struct bnxt_en_dev *en_dev;
146 int rc;
147
148 if (!rdev)
149 return -EINVAL;
150
151 en_dev = rdev->en_dev;
152
153 if (lock_wait)
154 rtnl_lock();
155
156 rc = en_dev->en_ops->bnxt_free_msix(rdev->en_dev, BNXT_ROCE_ULP);
157
158 if (lock_wait)
159 rtnl_unlock();
160 return rc;
161 }
162
163 static int bnxt_re_request_msix(struct bnxt_re_dev *rdev)
164 {
165 int rc = 0, num_msix_want = BNXT_RE_MIN_MSIX, num_msix_got;
166 struct bnxt_en_dev *en_dev;
167
168 if (!rdev)
169 return -EINVAL;
170
171 en_dev = rdev->en_dev;
172
173 rtnl_lock();
174 num_msix_got = en_dev->en_ops->bnxt_request_msix(en_dev, BNXT_ROCE_ULP,
175 rdev->msix_entries,
176 num_msix_want);
177 if (num_msix_got < BNXT_RE_MIN_MSIX) {
178 rc = -EINVAL;
179 goto done;
180 }
181 if (num_msix_got != num_msix_want) {
182 dev_warn(rdev_to_dev(rdev),
183 "Requested %d MSI-X vectors, got %d\n",
184 num_msix_want, num_msix_got);
185 }
186 rdev->num_msix = num_msix_got;
187 done:
188 rtnl_unlock();
189 return rc;
190 }
191
192 static void bnxt_re_init_hwrm_hdr(struct bnxt_re_dev *rdev, struct input *hdr,
193 u16 opcd, u16 crid, u16 trid)
194 {
195 hdr->req_type = cpu_to_le16(opcd);
196 hdr->cmpl_ring = cpu_to_le16(crid);
197 hdr->target_id = cpu_to_le16(trid);
198 }
199
200 static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg,
201 int msg_len, void *resp, int resp_max_len,
202 int timeout)
203 {
204 fw_msg->msg = msg;
205 fw_msg->msg_len = msg_len;
206 fw_msg->resp = resp;
207 fw_msg->resp_max_len = resp_max_len;
208 fw_msg->timeout = timeout;
209 }
210
211 static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, u16 fw_ring_id,
212 bool lock_wait)
213 {
214 struct bnxt_en_dev *en_dev = rdev->en_dev;
215 struct hwrm_ring_free_input req = {0};
216 struct hwrm_ring_free_output resp;
217 struct bnxt_fw_msg fw_msg;
218 bool do_unlock = false;
219 int rc = -EINVAL;
220
221 if (!en_dev)
222 return rc;
223
224 memset(&fw_msg, 0, sizeof(fw_msg));
225 if (lock_wait) {
226 rtnl_lock();
227 do_unlock = true;
228 }
229
230 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1);
231 req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
232 req.ring_id = cpu_to_le16(fw_ring_id);
233 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
234 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
235 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
236 if (rc)
237 dev_err(rdev_to_dev(rdev),
238 "Failed to free HW ring:%d :%#x", req.ring_id, rc);
239 if (do_unlock)
240 rtnl_unlock();
241 return rc;
242 }
243
244 static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev, dma_addr_t *dma_arr,
245 int pages, int type, u32 ring_mask,
246 u32 map_index, u16 *fw_ring_id)
247 {
248 struct bnxt_en_dev *en_dev = rdev->en_dev;
249 struct hwrm_ring_alloc_input req = {0};
250 struct hwrm_ring_alloc_output resp;
251 struct bnxt_fw_msg fw_msg;
252 int rc = -EINVAL;
253
254 if (!en_dev)
255 return rc;
256
257 memset(&fw_msg, 0, sizeof(fw_msg));
258 rtnl_lock();
259 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_ALLOC, -1, -1);
260 req.enables = 0;
261 req.page_tbl_addr = cpu_to_le64(dma_arr[0]);
262 if (pages > 1) {
263 /* Page size is in log2 units */
264 req.page_size = BNXT_PAGE_SHIFT;
265 req.page_tbl_depth = 1;
266 }
267 req.fbo = 0;
268 /* Association of ring index with doorbell index and MSIX number */
269 req.logical_id = cpu_to_le16(map_index);
270 req.length = cpu_to_le32(ring_mask + 1);
271 req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
272 req.int_mode = RING_ALLOC_REQ_INT_MODE_MSIX;
273 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
274 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
275 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
276 if (!rc)
277 *fw_ring_id = le16_to_cpu(resp.ring_id);
278
279 rtnl_unlock();
280 return rc;
281 }
282
283 static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev,
284 u32 fw_stats_ctx_id, bool lock_wait)
285 {
286 struct bnxt_en_dev *en_dev = rdev->en_dev;
287 struct hwrm_stat_ctx_free_input req = {0};
288 struct bnxt_fw_msg fw_msg;
289 bool do_unlock = false;
290 int rc = -EINVAL;
291
292 if (!en_dev)
293 return rc;
294
295 memset(&fw_msg, 0, sizeof(fw_msg));
296 if (lock_wait) {
297 rtnl_lock();
298 do_unlock = true;
299 }
300
301 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_FREE, -1, -1);
302 req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id);
303 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&req,
304 sizeof(req), DFLT_HWRM_CMD_TIMEOUT);
305 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
306 if (rc)
307 dev_err(rdev_to_dev(rdev),
308 "Failed to free HW stats context %#x", rc);
309
310 if (do_unlock)
311 rtnl_unlock();
312 return rc;
313 }
314
315 static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev,
316 dma_addr_t dma_map,
317 u32 *fw_stats_ctx_id)
318 {
319 struct hwrm_stat_ctx_alloc_output resp = {0};
320 struct hwrm_stat_ctx_alloc_input req = {0};
321 struct bnxt_en_dev *en_dev = rdev->en_dev;
322 struct bnxt_fw_msg fw_msg;
323 int rc = -EINVAL;
324
325 *fw_stats_ctx_id = INVALID_STATS_CTX_ID;
326
327 if (!en_dev)
328 return rc;
329
330 memset(&fw_msg, 0, sizeof(fw_msg));
331 rtnl_lock();
332
333 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_ALLOC, -1, -1);
334 req.update_period_ms = cpu_to_le32(1000);
335 req.stats_dma_addr = cpu_to_le64(dma_map);
336 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
337 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
338 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
339 if (!rc)
340 *fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id);
341
342 rtnl_unlock();
343 return rc;
344 }
345
346 /* Device */
347
348 static bool is_bnxt_re_dev(struct net_device *netdev)
349 {
350 struct ethtool_drvinfo drvinfo;
351
352 if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) {
353 memset(&drvinfo, 0, sizeof(drvinfo));
354 netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo);
355
356 if (strcmp(drvinfo.driver, "bnxt_en"))
357 return false;
358 return true;
359 }
360 return false;
361 }
362
363 static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
364 {
365 struct bnxt_re_dev *rdev;
366
367 rcu_read_lock();
368 list_for_each_entry_rcu(rdev, &bnxt_re_dev_list, list) {
369 if (rdev->netdev == netdev) {
370 rcu_read_unlock();
371 return rdev;
372 }
373 }
374 rcu_read_unlock();
375 return NULL;
376 }
377
378 static void bnxt_re_dev_unprobe(struct net_device *netdev,
379 struct bnxt_en_dev *en_dev)
380 {
381 dev_put(netdev);
382 module_put(en_dev->pdev->driver->driver.owner);
383 }
384
385 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
386 {
387 struct bnxt *bp = netdev_priv(netdev);
388 struct bnxt_en_dev *en_dev;
389 struct pci_dev *pdev;
390
391 /* Call bnxt_en's RoCE probe via indirect API */
392 if (!bp->ulp_probe)
393 return ERR_PTR(-EINVAL);
394
395 en_dev = bp->ulp_probe(netdev);
396 if (IS_ERR(en_dev))
397 return en_dev;
398
399 pdev = en_dev->pdev;
400 if (!pdev)
401 return ERR_PTR(-EINVAL);
402
403 if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) {
404 dev_dbg(&pdev->dev,
405 "%s: probe error: RoCE is not supported on this device",
406 ROCE_DRV_MODULE_NAME);
407 return ERR_PTR(-ENODEV);
408 }
409
410 /* Bump net device reference count */
411 if (!try_module_get(pdev->driver->driver.owner))
412 return ERR_PTR(-ENODEV);
413
414 dev_hold(netdev);
415
416 return en_dev;
417 }
418
419 static void bnxt_re_unregister_ib(struct bnxt_re_dev *rdev)
420 {
421 ib_unregister_device(&rdev->ibdev);
422 }
423
424 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
425 {
426 struct ib_device *ibdev = &rdev->ibdev;
427
428 /* ib device init */
429 ibdev->owner = THIS_MODULE;
430 ibdev->node_type = RDMA_NODE_IB_CA;
431 strlcpy(ibdev->name, "bnxt_re%d", IB_DEVICE_NAME_MAX);
432 strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
433 strlen(BNXT_RE_DESC) + 5);
434 ibdev->phys_port_cnt = 1;
435
436 bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid);
437
438 ibdev->num_comp_vectors = 1;
439 ibdev->dev.parent = &rdev->en_dev->pdev->dev;
440 ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;
441
442 /* User space */
443 ibdev->uverbs_abi_ver = BNXT_RE_ABI_VERSION;
444 ibdev->uverbs_cmd_mask =
445 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
446 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
447 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
448 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
449 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
450 (1ull << IB_USER_VERBS_CMD_REG_MR) |
451 (1ull << IB_USER_VERBS_CMD_REREG_MR) |
452 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
453 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
454 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
455 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
456 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
457 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
458 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
459 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
460 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
461 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
462 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
463 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
464 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
465 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
466 (1ull << IB_USER_VERBS_CMD_MODIFY_AH) |
467 (1ull << IB_USER_VERBS_CMD_QUERY_AH) |
468 (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
469 /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */
470
471 /* Kernel verbs */
472 ibdev->query_device = bnxt_re_query_device;
473 ibdev->modify_device = bnxt_re_modify_device;
474
475 ibdev->query_port = bnxt_re_query_port;
476 ibdev->modify_port = bnxt_re_modify_port;
477 ibdev->get_port_immutable = bnxt_re_get_port_immutable;
478 ibdev->query_pkey = bnxt_re_query_pkey;
479 ibdev->query_gid = bnxt_re_query_gid;
480 ibdev->get_netdev = bnxt_re_get_netdev;
481 ibdev->add_gid = bnxt_re_add_gid;
482 ibdev->del_gid = bnxt_re_del_gid;
483 ibdev->get_link_layer = bnxt_re_get_link_layer;
484
485 ibdev->alloc_pd = bnxt_re_alloc_pd;
486 ibdev->dealloc_pd = bnxt_re_dealloc_pd;
487
488 ibdev->create_ah = bnxt_re_create_ah;
489 ibdev->modify_ah = bnxt_re_modify_ah;
490 ibdev->query_ah = bnxt_re_query_ah;
491 ibdev->destroy_ah = bnxt_re_destroy_ah;
492
493 ibdev->create_qp = bnxt_re_create_qp;
494 ibdev->modify_qp = bnxt_re_modify_qp;
495 ibdev->query_qp = bnxt_re_query_qp;
496 ibdev->destroy_qp = bnxt_re_destroy_qp;
497
498 ibdev->post_send = bnxt_re_post_send;
499 ibdev->post_recv = bnxt_re_post_recv;
500
501 ibdev->create_cq = bnxt_re_create_cq;
502 ibdev->destroy_cq = bnxt_re_destroy_cq;
503 ibdev->poll_cq = bnxt_re_poll_cq;
504 ibdev->req_notify_cq = bnxt_re_req_notify_cq;
505
506 ibdev->get_dma_mr = bnxt_re_get_dma_mr;
507 ibdev->dereg_mr = bnxt_re_dereg_mr;
508 ibdev->alloc_mr = bnxt_re_alloc_mr;
509 ibdev->map_mr_sg = bnxt_re_map_mr_sg;
510
511 ibdev->reg_user_mr = bnxt_re_reg_user_mr;
512 ibdev->alloc_ucontext = bnxt_re_alloc_ucontext;
513 ibdev->dealloc_ucontext = bnxt_re_dealloc_ucontext;
514 ibdev->mmap = bnxt_re_mmap;
515
516 return ib_register_device(ibdev, NULL);
517 }
518
519 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
520 char *buf)
521 {
522 struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
523
524 return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
525 }
526
527 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
528 char *buf)
529 {
530 struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
531
532 return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->dev_attr.fw_ver);
533 }
534
535 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
536 char *buf)
537 {
538 struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
539
540 return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc);
541 }
542
543 static DEVICE_ATTR(hw_rev, 0444, show_rev, NULL);
544 static DEVICE_ATTR(fw_rev, 0444, show_fw_ver, NULL);
545 static DEVICE_ATTR(hca_type, 0444, show_hca, NULL);
546
547 static struct device_attribute *bnxt_re_attributes[] = {
548 &dev_attr_hw_rev,
549 &dev_attr_fw_rev,
550 &dev_attr_hca_type
551 };
552
553 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev)
554 {
555 dev_put(rdev->netdev);
556 rdev->netdev = NULL;
557
558 mutex_lock(&bnxt_re_dev_lock);
559 list_del_rcu(&rdev->list);
560 mutex_unlock(&bnxt_re_dev_lock);
561
562 synchronize_rcu();
563 flush_workqueue(bnxt_re_wq);
564
565 ib_dealloc_device(&rdev->ibdev);
566 /* rdev is gone */
567 }
568
569 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
570 struct bnxt_en_dev *en_dev)
571 {
572 struct bnxt_re_dev *rdev;
573
574 /* Allocate bnxt_re_dev instance here */
575 rdev = (struct bnxt_re_dev *)ib_alloc_device(sizeof(*rdev));
576 if (!rdev) {
577 dev_err(NULL, "%s: bnxt_re_dev allocation failure!",
578 ROCE_DRV_MODULE_NAME);
579 return NULL;
580 }
581 /* Default values */
582 rdev->netdev = netdev;
583 dev_hold(rdev->netdev);
584 rdev->en_dev = en_dev;
585 rdev->id = rdev->en_dev->pdev->devfn;
586 INIT_LIST_HEAD(&rdev->qp_list);
587 mutex_init(&rdev->qp_lock);
588 atomic_set(&rdev->qp_count, 0);
589 atomic_set(&rdev->cq_count, 0);
590 atomic_set(&rdev->srq_count, 0);
591 atomic_set(&rdev->mr_count, 0);
592 atomic_set(&rdev->mw_count, 0);
593 rdev->cosq[0] = 0xFFFF;
594 rdev->cosq[1] = 0xFFFF;
595
596 mutex_lock(&bnxt_re_dev_lock);
597 list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list);
598 mutex_unlock(&bnxt_re_dev_lock);
599 return rdev;
600 }
601
602 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
603 struct creq_func_event *aeqe)
604 {
605 switch (aeqe->event) {
606 case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
607 break;
608 case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
609 break;
610 case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
611 break;
612 case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
613 break;
614 case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
615 break;
616 case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
617 break;
618 case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
619 break;
620 case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
621 break;
622 case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
623 break;
624 case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
625 break;
626 case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
627 break;
628 default:
629 return -EINVAL;
630 }
631 return 0;
632 }
633
634 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
635 struct bnxt_qplib_cq *handle)
636 {
637 struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
638 qplib_cq);
639
640 if (!cq) {
641 dev_err(NULL, "%s: CQ is NULL, CQN not handled",
642 ROCE_DRV_MODULE_NAME);
643 return -EINVAL;
644 }
645 if (cq->ib_cq.comp_handler) {
646 /* Lock comp_handler? */
647 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
648 }
649
650 return 0;
651 }
652
653 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
654 {
655 if (rdev->nq.hwq.max_elements)
656 bnxt_qplib_disable_nq(&rdev->nq);
657
658 if (rdev->qplib_res.rcfw)
659 bnxt_qplib_cleanup_res(&rdev->qplib_res);
660 }
661
662 static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
663 {
664 int rc = 0;
665
666 bnxt_qplib_init_res(&rdev->qplib_res);
667
668 if (rdev->msix_entries[BNXT_RE_NQ_IDX].vector <= 0)
669 return -EINVAL;
670
671 rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq,
672 rdev->msix_entries[BNXT_RE_NQ_IDX].vector,
673 rdev->msix_entries[BNXT_RE_NQ_IDX].db_offset,
674 &bnxt_re_cqn_handler,
675 NULL);
676
677 if (rc)
678 dev_err(rdev_to_dev(rdev), "Failed to enable NQ: %#x", rc);
679
680 return rc;
681 }
682
683 static void bnxt_re_free_res(struct bnxt_re_dev *rdev, bool lock_wait)
684 {
685 if (rdev->nq.hwq.max_elements) {
686 bnxt_re_net_ring_free(rdev, rdev->nq.ring_id, lock_wait);
687 bnxt_qplib_free_nq(&rdev->nq);
688 }
689 if (rdev->qplib_res.dpi_tbl.max) {
690 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
691 &rdev->qplib_res.dpi_tbl,
692 &rdev->dpi_privileged);
693 }
694 if (rdev->qplib_res.rcfw) {
695 bnxt_qplib_free_res(&rdev->qplib_res);
696 rdev->qplib_res.rcfw = NULL;
697 }
698 }
699
700 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
701 {
702 int rc = 0;
703
704 /* Configure and allocate resources for qplib */
705 rdev->qplib_res.rcfw = &rdev->rcfw;
706 rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
707 if (rc)
708 goto fail;
709
710 rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
711 rdev->netdev, &rdev->dev_attr);
712 if (rc)
713 goto fail;
714
715 rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
716 &rdev->dpi_privileged,
717 rdev);
718 if (rc)
719 goto fail;
720
721 rdev->nq.hwq.max_elements = BNXT_RE_MAX_CQ_COUNT +
722 BNXT_RE_MAX_SRQC_COUNT + 2;
723 rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq);
724 if (rc) {
725 dev_err(rdev_to_dev(rdev),
726 "Failed to allocate NQ memory: %#x", rc);
727 goto fail;
728 }
729 rc = bnxt_re_net_ring_alloc
730 (rdev, rdev->nq.hwq.pbl[PBL_LVL_0].pg_map_arr,
731 rdev->nq.hwq.pbl[rdev->nq.hwq.level].pg_count,
732 HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_NQE_MAX_CNT - 1,
733 rdev->msix_entries[BNXT_RE_NQ_IDX].ring_idx,
734 &rdev->nq.ring_id);
735 if (rc) {
736 dev_err(rdev_to_dev(rdev),
737 "Failed to allocate NQ ring: %#x", rc);
738 goto free_nq;
739 }
740 return 0;
741 free_nq:
742 bnxt_qplib_free_nq(&rdev->nq);
743 fail:
744 rdev->qplib_res.rcfw = NULL;
745 return rc;
746 }
747
748 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
749 u8 port_num, enum ib_event_type event)
750 {
751 struct ib_event ib_event;
752
753 ib_event.device = ibdev;
754 if (qp)
755 ib_event.element.qp = qp;
756 else
757 ib_event.element.port_num = port_num;
758 ib_event.event = event;
759 ib_dispatch_event(&ib_event);
760 }
761
762 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN 0x02
763 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
764 u64 *cid_map)
765 {
766 struct hwrm_queue_pri2cos_qcfg_input req = {0};
767 struct bnxt *bp = netdev_priv(rdev->netdev);
768 struct hwrm_queue_pri2cos_qcfg_output resp;
769 struct bnxt_en_dev *en_dev = rdev->en_dev;
770 struct bnxt_fw_msg fw_msg;
771 u32 flags = 0;
772 u8 *qcfgmap, *tmp_map;
773 int rc = 0, i;
774
775 if (!cid_map)
776 return -EINVAL;
777
778 memset(&fw_msg, 0, sizeof(fw_msg));
779 bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
780 HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
781 flags |= (dir & 0x01);
782 flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
783 req.flags = cpu_to_le32(flags);
784 req.port_id = bp->pf.port_id;
785
786 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
787 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
788 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
789 if (rc)
790 return rc;
791
792 if (resp.queue_cfg_info) {
793 dev_warn(rdev_to_dev(rdev),
794 "Asymmetric cos queue configuration detected");
795 dev_warn(rdev_to_dev(rdev),
796 " on device, QoS may not be fully functional\n");
797 }
798 qcfgmap = &resp.pri0_cos_queue_id;
799 tmp_map = (u8 *)cid_map;
800 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
801 tmp_map[i] = qcfgmap[i];
802
803 return rc;
804 }
805
806 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
807 struct bnxt_re_qp *qp)
808 {
809 return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp);
810 }
811
812 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
813 {
814 int mask = IB_QP_STATE;
815 struct ib_qp_attr qp_attr;
816 struct bnxt_re_qp *qp;
817
818 qp_attr.qp_state = IB_QPS_ERR;
819 mutex_lock(&rdev->qp_lock);
820 list_for_each_entry(qp, &rdev->qp_list, list) {
821 /* Modify the state of all QPs except QP1/Shadow QP */
822 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
823 if (qp->qplib_qp.state !=
824 CMDQ_MODIFY_QP_NEW_STATE_RESET &&
825 qp->qplib_qp.state !=
826 CMDQ_MODIFY_QP_NEW_STATE_ERR) {
827 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
828 1, IB_EVENT_QP_FATAL);
829 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
830 NULL);
831 }
832 }
833 }
834 mutex_unlock(&rdev->qp_lock);
835 }
836
837 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
838 {
839 u32 prio_map = 0, tmp_map = 0;
840 struct net_device *netdev;
841 struct dcb_app app;
842
843 netdev = rdev->netdev;
844
845 memset(&app, 0, sizeof(app));
846 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
847 app.protocol = ETH_P_IBOE;
848 tmp_map = dcb_ieee_getapp_mask(netdev, &app);
849 prio_map = tmp_map;
850
851 app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
852 app.protocol = ROCE_V2_UDP_DPORT;
853 tmp_map = dcb_ieee_getapp_mask(netdev, &app);
854 prio_map |= tmp_map;
855
856 if (!prio_map)
857 prio_map = -EFAULT;
858 return prio_map;
859 }
860
861 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
862 {
863 u16 prio;
864 u8 id;
865
866 for (prio = 0, id = 0; prio < 8; prio++) {
867 if (prio_map & (1 << prio)) {
868 cosq[id] = cid_map[prio];
869 id++;
870 if (id == 2) /* Max 2 tcs supported */
871 break;
872 }
873 }
874 }
875
876 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
877 {
878 u8 prio_map = 0;
879 u64 cid_map;
880 int rc;
881
882 /* Get priority for roce */
883 rc = bnxt_re_get_priority_mask(rdev);
884 if (rc < 0)
885 return rc;
886 prio_map = (u8)rc;
887
888 if (prio_map == rdev->cur_prio_map)
889 return 0;
890 rdev->cur_prio_map = prio_map;
891 /* Get cosq id for this priority */
892 rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
893 if (rc) {
894 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map);
895 return rc;
896 }
897 /* Parse CoS IDs for app priority */
898 bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);
899
900 /* Config BONO. */
901 rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
902 if (rc) {
903 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n",
904 rdev->cosq[0], rdev->cosq[1]);
905 return rc;
906 }
907
908 return 0;
909 }
910
911 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev, bool lock_wait)
912 {
913 int i, rc;
914
915 if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
916 for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++)
917 device_remove_file(&rdev->ibdev.dev,
918 bnxt_re_attributes[i]);
919 /* Cleanup ib dev */
920 bnxt_re_unregister_ib(rdev);
921 }
922 if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
923 cancel_delayed_work(&rdev->worker);
924
925 bnxt_re_cleanup_res(rdev);
926 bnxt_re_free_res(rdev, lock_wait);
927
928 if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
929 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
930 if (rc)
931 dev_warn(rdev_to_dev(rdev),
932 "Failed to deinitialize RCFW: %#x", rc);
933 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id,
934 lock_wait);
935 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
936 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
937 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, lock_wait);
938 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
939 }
940 if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
941 rc = bnxt_re_free_msix(rdev, lock_wait);
942 if (rc)
943 dev_warn(rdev_to_dev(rdev),
944 "Failed to free MSI-X vectors: %#x", rc);
945 }
946 if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
947 rc = bnxt_re_unregister_netdev(rdev, lock_wait);
948 if (rc)
949 dev_warn(rdev_to_dev(rdev),
950 "Failed to unregister with netdev: %#x", rc);
951 }
952 }
953
954 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
955 {
956 u32 i;
957
958 rdev->qplib_ctx.qpc_count = BNXT_RE_MAX_QPC_COUNT;
959 rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT;
960 rdev->qplib_ctx.srqc_count = BNXT_RE_MAX_SRQC_COUNT;
961 rdev->qplib_ctx.cq_count = BNXT_RE_MAX_CQ_COUNT;
962 for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
963 rdev->qplib_ctx.tqm_count[i] =
964 rdev->dev_attr.tqm_alloc_reqs[i];
965 }
966
967 /* worker thread for polling periodic events. Now used for QoS programming*/
968 static void bnxt_re_worker(struct work_struct *work)
969 {
970 struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
971 worker.work);
972
973 bnxt_re_setup_qos(rdev);
974 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
975 }
976
977 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev)
978 {
979 int i, j, rc;
980
981 /* Registered a new RoCE device instance to netdev */
982 rc = bnxt_re_register_netdev(rdev);
983 if (rc) {
984 pr_err("Failed to register with netedev: %#x\n", rc);
985 return -EINVAL;
986 }
987 set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
988
989 rc = bnxt_re_request_msix(rdev);
990 if (rc) {
991 pr_err("Failed to get MSI-X vectors: %#x\n", rc);
992 rc = -EINVAL;
993 goto fail;
994 }
995 set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);
996
997 /* Establish RCFW Communication Channel to initialize the context
998 * memory for the function and all child VFs
999 */
1000 rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw);
1001 if (rc)
1002 goto fail;
1003
1004 rc = bnxt_re_net_ring_alloc
1005 (rdev, rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr,
1006 rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count,
1007 HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_CREQE_MAX_CNT - 1,
1008 rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx,
1009 &rdev->rcfw.creq_ring_id);
1010 if (rc) {
1011 pr_err("Failed to allocate CREQ: %#x\n", rc);
1012 goto free_rcfw;
1013 }
1014 rc = bnxt_qplib_enable_rcfw_channel
1015 (rdev->en_dev->pdev, &rdev->rcfw,
1016 rdev->msix_entries[BNXT_RE_AEQ_IDX].vector,
1017 rdev->msix_entries[BNXT_RE_AEQ_IDX].db_offset,
1018 0, &bnxt_re_aeq_handler);
1019 if (rc) {
1020 pr_err("Failed to enable RCFW channel: %#x\n", rc);
1021 goto free_ring;
1022 }
1023
1024 rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
1025 if (rc)
1026 goto disable_rcfw;
1027 bnxt_re_set_resource_limits(rdev);
1028
1029 rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0);
1030 if (rc) {
1031 pr_err("Failed to allocate QPLIB context: %#x\n", rc);
1032 goto disable_rcfw;
1033 }
1034 rc = bnxt_re_net_stats_ctx_alloc(rdev,
1035 rdev->qplib_ctx.stats.dma_map,
1036 &rdev->qplib_ctx.stats.fw_id);
1037 if (rc) {
1038 pr_err("Failed to allocate stats context: %#x\n", rc);
1039 goto free_ctx;
1040 }
1041
1042 rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx, 0);
1043 if (rc) {
1044 pr_err("Failed to initialize RCFW: %#x\n", rc);
1045 goto free_sctx;
1046 }
1047 set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1048
1049 /* Resources based on the 'new' device caps */
1050 rc = bnxt_re_alloc_res(rdev);
1051 if (rc) {
1052 pr_err("Failed to allocate resources: %#x\n", rc);
1053 goto fail;
1054 }
1055 rc = bnxt_re_init_res(rdev);
1056 if (rc) {
1057 pr_err("Failed to initialize resources: %#x\n", rc);
1058 goto fail;
1059 }
1060
1061 rc = bnxt_re_setup_qos(rdev);
1062 if (rc)
1063 pr_info("RoCE priority not yet configured\n");
1064
1065 INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1066 set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1067 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1068
1069 /* Register ib dev */
1070 rc = bnxt_re_register_ib(rdev);
1071 if (rc) {
1072 pr_err("Failed to register with IB: %#x\n", rc);
1073 goto fail;
1074 }
1075 dev_info(rdev_to_dev(rdev), "Device registered successfully");
1076 for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++) {
1077 rc = device_create_file(&rdev->ibdev.dev,
1078 bnxt_re_attributes[i]);
1079 if (rc) {
1080 dev_err(rdev_to_dev(rdev),
1081 "Failed to create IB sysfs: %#x", rc);
1082 /* Must clean up all created device files */
1083 for (j = 0; j < i; j++)
1084 device_remove_file(&rdev->ibdev.dev,
1085 bnxt_re_attributes[j]);
1086 bnxt_re_unregister_ib(rdev);
1087 goto fail;
1088 }
1089 }
1090 set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
1091 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE);
1092 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE);
1093
1094 return 0;
1095 free_sctx:
1096 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id, true);
1097 free_ctx:
1098 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1099 disable_rcfw:
1100 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1101 free_ring:
1102 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, true);
1103 free_rcfw:
1104 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1105 fail:
1106 bnxt_re_ib_unreg(rdev, true);
1107 return rc;
1108 }
1109
1110 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
1111 {
1112 struct bnxt_en_dev *en_dev = rdev->en_dev;
1113 struct net_device *netdev = rdev->netdev;
1114
1115 bnxt_re_dev_remove(rdev);
1116
1117 if (netdev)
1118 bnxt_re_dev_unprobe(netdev, en_dev);
1119 }
1120
1121 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
1122 {
1123 struct bnxt_en_dev *en_dev;
1124 int rc = 0;
1125
1126 if (!is_bnxt_re_dev(netdev))
1127 return -ENODEV;
1128
1129 en_dev = bnxt_re_dev_probe(netdev);
1130 if (IS_ERR(en_dev)) {
1131 if (en_dev != ERR_PTR(-ENODEV))
1132 pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME);
1133 rc = PTR_ERR(en_dev);
1134 goto exit;
1135 }
1136 *rdev = bnxt_re_dev_add(netdev, en_dev);
1137 if (!*rdev) {
1138 rc = -ENOMEM;
1139 bnxt_re_dev_unprobe(netdev, en_dev);
1140 goto exit;
1141 }
1142 exit:
1143 return rc;
1144 }
1145
1146 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev)
1147 {
1148 pci_dev_put(rdev->en_dev->pdev);
1149 }
1150
1151 /* Handle all deferred netevents tasks */
1152 static void bnxt_re_task(struct work_struct *work)
1153 {
1154 struct bnxt_re_work *re_work;
1155 struct bnxt_re_dev *rdev;
1156 int rc = 0;
1157
1158 re_work = container_of(work, struct bnxt_re_work, work);
1159 rdev = re_work->rdev;
1160
1161 if (re_work->event != NETDEV_REGISTER &&
1162 !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1163 return;
1164
1165 switch (re_work->event) {
1166 case NETDEV_REGISTER:
1167 rc = bnxt_re_ib_reg(rdev);
1168 if (rc)
1169 dev_err(rdev_to_dev(rdev),
1170 "Failed to register with IB: %#x", rc);
1171 break;
1172 case NETDEV_UP:
1173 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1174 IB_EVENT_PORT_ACTIVE);
1175 break;
1176 case NETDEV_DOWN:
1177 bnxt_re_dev_stop(rdev);
1178 break;
1179 case NETDEV_CHANGE:
1180 if (!netif_carrier_ok(rdev->netdev))
1181 bnxt_re_dev_stop(rdev);
1182 else if (netif_carrier_ok(rdev->netdev))
1183 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1184 IB_EVENT_PORT_ACTIVE);
1185 break;
1186 default:
1187 break;
1188 }
1189 kfree(re_work);
1190 }
1191
1192 static void bnxt_re_init_one(struct bnxt_re_dev *rdev)
1193 {
1194 pci_dev_get(rdev->en_dev->pdev);
1195 }
1196
1197 /*
1198 * "Notifier chain callback can be invoked for the same chain from
1199 * different CPUs at the same time".
1200 *
1201 * For cases when the netdev is already present, our call to the
1202 * register_netdevice_notifier() will actually get the rtnl_lock()
1203 * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1204 * events.
1205 *
1206 * But for cases when the netdev is not already present, the notifier
1207 * chain is subjected to be invoked from different CPUs simultaneously.
1208 *
1209 * This is protected by the netdev_mutex.
1210 */
1211 static int bnxt_re_netdev_event(struct notifier_block *notifier,
1212 unsigned long event, void *ptr)
1213 {
1214 struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
1215 struct bnxt_re_work *re_work;
1216 struct bnxt_re_dev *rdev;
1217 int rc = 0;
1218 bool sch_work = false;
1219
1220 real_dev = rdma_vlan_dev_real_dev(netdev);
1221 if (!real_dev)
1222 real_dev = netdev;
1223
1224 rdev = bnxt_re_from_netdev(real_dev);
1225 if (!rdev && event != NETDEV_REGISTER)
1226 goto exit;
1227 if (real_dev != netdev)
1228 goto exit;
1229
1230 switch (event) {
1231 case NETDEV_REGISTER:
1232 if (rdev)
1233 break;
1234 rc = bnxt_re_dev_reg(&rdev, real_dev);
1235 if (rc == -ENODEV)
1236 break;
1237 if (rc) {
1238 pr_err("Failed to register with the device %s: %#x\n",
1239 real_dev->name, rc);
1240 break;
1241 }
1242 bnxt_re_init_one(rdev);
1243 sch_work = true;
1244 break;
1245
1246 case NETDEV_UNREGISTER:
1247 bnxt_re_ib_unreg(rdev, false);
1248 bnxt_re_remove_one(rdev);
1249 bnxt_re_dev_unreg(rdev);
1250 break;
1251
1252 default:
1253 sch_work = true;
1254 break;
1255 }
1256 if (sch_work) {
1257 /* Allocate for the deferred task */
1258 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
1259 if (re_work) {
1260 re_work->rdev = rdev;
1261 re_work->event = event;
1262 re_work->vlan_dev = (real_dev == netdev ?
1263 NULL : netdev);
1264 INIT_WORK(&re_work->work, bnxt_re_task);
1265 queue_work(bnxt_re_wq, &re_work->work);
1266 }
1267 }
1268
1269 exit:
1270 return NOTIFY_DONE;
1271 }
1272
1273 static struct notifier_block bnxt_re_netdev_notifier = {
1274 .notifier_call = bnxt_re_netdev_event
1275 };
1276
1277 static int __init bnxt_re_mod_init(void)
1278 {
1279 int rc = 0;
1280
1281 pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
1282
1283 bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
1284 if (!bnxt_re_wq)
1285 return -ENOMEM;
1286
1287 INIT_LIST_HEAD(&bnxt_re_dev_list);
1288
1289 rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
1290 if (rc) {
1291 pr_err("%s: Cannot register to netdevice_notifier",
1292 ROCE_DRV_MODULE_NAME);
1293 goto err_netdev;
1294 }
1295 return 0;
1296
1297 err_netdev:
1298 destroy_workqueue(bnxt_re_wq);
1299
1300 return rc;
1301 }
1302
1303 static void __exit bnxt_re_mod_exit(void)
1304 {
1305 unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
1306 if (bnxt_re_wq)
1307 destroy_workqueue(bnxt_re_wq);
1308 }
1309
1310 module_init(bnxt_re_mod_init);
1311 module_exit(bnxt_re_mod_exit);
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