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Merge tag 'trace-v4.14-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rosted...
[mirror_ubuntu-focal-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 #include "hw_counters.h"
68
69 static char version[] =
70 BNXT_RE_DESC " v" ROCE_DRV_MODULE_VERSION "\n";
71
72 MODULE_AUTHOR("Eddie Wai <eddie.wai@broadcom.com>");
73 MODULE_DESCRIPTION(BNXT_RE_DESC " Driver");
74 MODULE_LICENSE("Dual BSD/GPL");
75
76 /* globals */
77 static struct list_head bnxt_re_dev_list = LIST_HEAD_INIT(bnxt_re_dev_list);
78 /* Mutex to protect the list of bnxt_re devices added */
79 static DEFINE_MUTEX(bnxt_re_dev_lock);
80 static struct workqueue_struct *bnxt_re_wq;
81
82 /* for handling bnxt_en callbacks later */
83 static void bnxt_re_stop(void *p)
84 {
85 }
86
87 static void bnxt_re_start(void *p)
88 {
89 }
90
91 static void bnxt_re_sriov_config(void *p, int num_vfs)
92 {
93 }
94
95 static struct bnxt_ulp_ops bnxt_re_ulp_ops = {
96 .ulp_async_notifier = NULL,
97 .ulp_stop = bnxt_re_stop,
98 .ulp_start = bnxt_re_start,
99 .ulp_sriov_config = bnxt_re_sriov_config
100 };
101
102 /* RoCE -> Net driver */
103
104 /* Driver registration routines used to let the networking driver (bnxt_en)
105 * to know that the RoCE driver is now installed
106 */
107 static int bnxt_re_unregister_netdev(struct bnxt_re_dev *rdev, bool lock_wait)
108 {
109 struct bnxt_en_dev *en_dev;
110 int rc;
111
112 if (!rdev)
113 return -EINVAL;
114
115 en_dev = rdev->en_dev;
116 /* Acquire rtnl lock if it is not invokded from netdev event */
117 if (lock_wait)
118 rtnl_lock();
119
120 rc = en_dev->en_ops->bnxt_unregister_device(rdev->en_dev,
121 BNXT_ROCE_ULP);
122 if (lock_wait)
123 rtnl_unlock();
124 return rc;
125 }
126
127 static int bnxt_re_register_netdev(struct bnxt_re_dev *rdev)
128 {
129 struct bnxt_en_dev *en_dev;
130 int rc = 0;
131
132 if (!rdev)
133 return -EINVAL;
134
135 en_dev = rdev->en_dev;
136
137 rtnl_lock();
138 rc = en_dev->en_ops->bnxt_register_device(en_dev, BNXT_ROCE_ULP,
139 &bnxt_re_ulp_ops, rdev);
140 rtnl_unlock();
141 return rc;
142 }
143
144 static int bnxt_re_free_msix(struct bnxt_re_dev *rdev, bool lock_wait)
145 {
146 struct bnxt_en_dev *en_dev;
147 int rc;
148
149 if (!rdev)
150 return -EINVAL;
151
152 en_dev = rdev->en_dev;
153
154 if (lock_wait)
155 rtnl_lock();
156
157 rc = en_dev->en_ops->bnxt_free_msix(rdev->en_dev, BNXT_ROCE_ULP);
158
159 if (lock_wait)
160 rtnl_unlock();
161 return rc;
162 }
163
164 static int bnxt_re_request_msix(struct bnxt_re_dev *rdev)
165 {
166 int rc = 0, num_msix_want = BNXT_RE_MAX_MSIX, num_msix_got;
167 struct bnxt_en_dev *en_dev;
168
169 if (!rdev)
170 return -EINVAL;
171
172 en_dev = rdev->en_dev;
173
174 num_msix_want = min_t(u32, BNXT_RE_MAX_MSIX, num_online_cpus());
175
176 rtnl_lock();
177 num_msix_got = en_dev->en_ops->bnxt_request_msix(en_dev, BNXT_ROCE_ULP,
178 rdev->msix_entries,
179 num_msix_want);
180 if (num_msix_got < BNXT_RE_MIN_MSIX) {
181 rc = -EINVAL;
182 goto done;
183 }
184 if (num_msix_got != num_msix_want) {
185 dev_warn(rdev_to_dev(rdev),
186 "Requested %d MSI-X vectors, got %d\n",
187 num_msix_want, num_msix_got);
188 }
189 rdev->num_msix = num_msix_got;
190 done:
191 rtnl_unlock();
192 return rc;
193 }
194
195 static void bnxt_re_init_hwrm_hdr(struct bnxt_re_dev *rdev, struct input *hdr,
196 u16 opcd, u16 crid, u16 trid)
197 {
198 hdr->req_type = cpu_to_le16(opcd);
199 hdr->cmpl_ring = cpu_to_le16(crid);
200 hdr->target_id = cpu_to_le16(trid);
201 }
202
203 static void bnxt_re_fill_fw_msg(struct bnxt_fw_msg *fw_msg, void *msg,
204 int msg_len, void *resp, int resp_max_len,
205 int timeout)
206 {
207 fw_msg->msg = msg;
208 fw_msg->msg_len = msg_len;
209 fw_msg->resp = resp;
210 fw_msg->resp_max_len = resp_max_len;
211 fw_msg->timeout = timeout;
212 }
213
214 static int bnxt_re_net_ring_free(struct bnxt_re_dev *rdev, u16 fw_ring_id,
215 bool lock_wait)
216 {
217 struct bnxt_en_dev *en_dev = rdev->en_dev;
218 struct hwrm_ring_free_input req = {0};
219 struct hwrm_ring_free_output resp;
220 struct bnxt_fw_msg fw_msg;
221 bool do_unlock = false;
222 int rc = -EINVAL;
223
224 if (!en_dev)
225 return rc;
226
227 memset(&fw_msg, 0, sizeof(fw_msg));
228 if (lock_wait) {
229 rtnl_lock();
230 do_unlock = true;
231 }
232
233 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_FREE, -1, -1);
234 req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
235 req.ring_id = cpu_to_le16(fw_ring_id);
236 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
237 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
238 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
239 if (rc)
240 dev_err(rdev_to_dev(rdev),
241 "Failed to free HW ring:%d :%#x", req.ring_id, rc);
242 if (do_unlock)
243 rtnl_unlock();
244 return rc;
245 }
246
247 static int bnxt_re_net_ring_alloc(struct bnxt_re_dev *rdev, dma_addr_t *dma_arr,
248 int pages, int type, u32 ring_mask,
249 u32 map_index, u16 *fw_ring_id)
250 {
251 struct bnxt_en_dev *en_dev = rdev->en_dev;
252 struct hwrm_ring_alloc_input req = {0};
253 struct hwrm_ring_alloc_output resp;
254 struct bnxt_fw_msg fw_msg;
255 int rc = -EINVAL;
256
257 if (!en_dev)
258 return rc;
259
260 memset(&fw_msg, 0, sizeof(fw_msg));
261 rtnl_lock();
262 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_RING_ALLOC, -1, -1);
263 req.enables = 0;
264 req.page_tbl_addr = cpu_to_le64(dma_arr[0]);
265 if (pages > 1) {
266 /* Page size is in log2 units */
267 req.page_size = BNXT_PAGE_SHIFT;
268 req.page_tbl_depth = 1;
269 }
270 req.fbo = 0;
271 /* Association of ring index with doorbell index and MSIX number */
272 req.logical_id = cpu_to_le16(map_index);
273 req.length = cpu_to_le32(ring_mask + 1);
274 req.ring_type = RING_ALLOC_REQ_RING_TYPE_L2_CMPL;
275 req.int_mode = RING_ALLOC_REQ_INT_MODE_MSIX;
276 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
277 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
278 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
279 if (!rc)
280 *fw_ring_id = le16_to_cpu(resp.ring_id);
281
282 rtnl_unlock();
283 return rc;
284 }
285
286 static int bnxt_re_net_stats_ctx_free(struct bnxt_re_dev *rdev,
287 u32 fw_stats_ctx_id, bool lock_wait)
288 {
289 struct bnxt_en_dev *en_dev = rdev->en_dev;
290 struct hwrm_stat_ctx_free_input req = {0};
291 struct bnxt_fw_msg fw_msg;
292 bool do_unlock = false;
293 int rc = -EINVAL;
294
295 if (!en_dev)
296 return rc;
297
298 memset(&fw_msg, 0, sizeof(fw_msg));
299 if (lock_wait) {
300 rtnl_lock();
301 do_unlock = true;
302 }
303
304 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_FREE, -1, -1);
305 req.stat_ctx_id = cpu_to_le32(fw_stats_ctx_id);
306 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&req,
307 sizeof(req), DFLT_HWRM_CMD_TIMEOUT);
308 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
309 if (rc)
310 dev_err(rdev_to_dev(rdev),
311 "Failed to free HW stats context %#x", rc);
312
313 if (do_unlock)
314 rtnl_unlock();
315 return rc;
316 }
317
318 static int bnxt_re_net_stats_ctx_alloc(struct bnxt_re_dev *rdev,
319 dma_addr_t dma_map,
320 u32 *fw_stats_ctx_id)
321 {
322 struct hwrm_stat_ctx_alloc_output resp = {0};
323 struct hwrm_stat_ctx_alloc_input req = {0};
324 struct bnxt_en_dev *en_dev = rdev->en_dev;
325 struct bnxt_fw_msg fw_msg;
326 int rc = -EINVAL;
327
328 *fw_stats_ctx_id = INVALID_STATS_CTX_ID;
329
330 if (!en_dev)
331 return rc;
332
333 memset(&fw_msg, 0, sizeof(fw_msg));
334 rtnl_lock();
335
336 bnxt_re_init_hwrm_hdr(rdev, (void *)&req, HWRM_STAT_CTX_ALLOC, -1, -1);
337 req.update_period_ms = cpu_to_le32(1000);
338 req.stats_dma_addr = cpu_to_le64(dma_map);
339 req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE;
340 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
341 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
342 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
343 if (!rc)
344 *fw_stats_ctx_id = le32_to_cpu(resp.stat_ctx_id);
345
346 rtnl_unlock();
347 return rc;
348 }
349
350 /* Device */
351
352 static bool is_bnxt_re_dev(struct net_device *netdev)
353 {
354 struct ethtool_drvinfo drvinfo;
355
356 if (netdev->ethtool_ops && netdev->ethtool_ops->get_drvinfo) {
357 memset(&drvinfo, 0, sizeof(drvinfo));
358 netdev->ethtool_ops->get_drvinfo(netdev, &drvinfo);
359
360 if (strcmp(drvinfo.driver, "bnxt_en"))
361 return false;
362 return true;
363 }
364 return false;
365 }
366
367 static struct bnxt_re_dev *bnxt_re_from_netdev(struct net_device *netdev)
368 {
369 struct bnxt_re_dev *rdev;
370
371 rcu_read_lock();
372 list_for_each_entry_rcu(rdev, &bnxt_re_dev_list, list) {
373 if (rdev->netdev == netdev) {
374 rcu_read_unlock();
375 return rdev;
376 }
377 }
378 rcu_read_unlock();
379 return NULL;
380 }
381
382 static void bnxt_re_dev_unprobe(struct net_device *netdev,
383 struct bnxt_en_dev *en_dev)
384 {
385 dev_put(netdev);
386 module_put(en_dev->pdev->driver->driver.owner);
387 }
388
389 static struct bnxt_en_dev *bnxt_re_dev_probe(struct net_device *netdev)
390 {
391 struct bnxt *bp = netdev_priv(netdev);
392 struct bnxt_en_dev *en_dev;
393 struct pci_dev *pdev;
394
395 /* Call bnxt_en's RoCE probe via indirect API */
396 if (!bp->ulp_probe)
397 return ERR_PTR(-EINVAL);
398
399 en_dev = bp->ulp_probe(netdev);
400 if (IS_ERR(en_dev))
401 return en_dev;
402
403 pdev = en_dev->pdev;
404 if (!pdev)
405 return ERR_PTR(-EINVAL);
406
407 if (!(en_dev->flags & BNXT_EN_FLAG_ROCE_CAP)) {
408 dev_dbg(&pdev->dev,
409 "%s: probe error: RoCE is not supported on this device",
410 ROCE_DRV_MODULE_NAME);
411 return ERR_PTR(-ENODEV);
412 }
413
414 /* Bump net device reference count */
415 if (!try_module_get(pdev->driver->driver.owner))
416 return ERR_PTR(-ENODEV);
417
418 dev_hold(netdev);
419
420 return en_dev;
421 }
422
423 static void bnxt_re_unregister_ib(struct bnxt_re_dev *rdev)
424 {
425 ib_unregister_device(&rdev->ibdev);
426 }
427
428 static int bnxt_re_register_ib(struct bnxt_re_dev *rdev)
429 {
430 struct ib_device *ibdev = &rdev->ibdev;
431
432 /* ib device init */
433 ibdev->owner = THIS_MODULE;
434 ibdev->node_type = RDMA_NODE_IB_CA;
435 strlcpy(ibdev->name, "bnxt_re%d", IB_DEVICE_NAME_MAX);
436 strlcpy(ibdev->node_desc, BNXT_RE_DESC " HCA",
437 strlen(BNXT_RE_DESC) + 5);
438 ibdev->phys_port_cnt = 1;
439
440 bnxt_qplib_get_guid(rdev->netdev->dev_addr, (u8 *)&ibdev->node_guid);
441
442 ibdev->num_comp_vectors = 1;
443 ibdev->dev.parent = &rdev->en_dev->pdev->dev;
444 ibdev->local_dma_lkey = BNXT_QPLIB_RSVD_LKEY;
445
446 /* User space */
447 ibdev->uverbs_abi_ver = BNXT_RE_ABI_VERSION;
448 ibdev->uverbs_cmd_mask =
449 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
450 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
451 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
452 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
453 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
454 (1ull << IB_USER_VERBS_CMD_REG_MR) |
455 (1ull << IB_USER_VERBS_CMD_REREG_MR) |
456 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
457 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
458 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
459 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
460 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
461 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
462 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
463 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
464 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
465 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
466 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
467 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
468 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
469 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
470 (1ull << IB_USER_VERBS_CMD_MODIFY_AH) |
471 (1ull << IB_USER_VERBS_CMD_QUERY_AH) |
472 (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
473 /* POLL_CQ and REQ_NOTIFY_CQ is directly handled in libbnxt_re */
474
475 /* Kernel verbs */
476 ibdev->query_device = bnxt_re_query_device;
477 ibdev->modify_device = bnxt_re_modify_device;
478
479 ibdev->query_port = bnxt_re_query_port;
480 ibdev->get_port_immutable = bnxt_re_get_port_immutable;
481 ibdev->query_pkey = bnxt_re_query_pkey;
482 ibdev->query_gid = bnxt_re_query_gid;
483 ibdev->get_netdev = bnxt_re_get_netdev;
484 ibdev->add_gid = bnxt_re_add_gid;
485 ibdev->del_gid = bnxt_re_del_gid;
486 ibdev->get_link_layer = bnxt_re_get_link_layer;
487
488 ibdev->alloc_pd = bnxt_re_alloc_pd;
489 ibdev->dealloc_pd = bnxt_re_dealloc_pd;
490
491 ibdev->create_ah = bnxt_re_create_ah;
492 ibdev->modify_ah = bnxt_re_modify_ah;
493 ibdev->query_ah = bnxt_re_query_ah;
494 ibdev->destroy_ah = bnxt_re_destroy_ah;
495
496 ibdev->create_qp = bnxt_re_create_qp;
497 ibdev->modify_qp = bnxt_re_modify_qp;
498 ibdev->query_qp = bnxt_re_query_qp;
499 ibdev->destroy_qp = bnxt_re_destroy_qp;
500
501 ibdev->post_send = bnxt_re_post_send;
502 ibdev->post_recv = bnxt_re_post_recv;
503
504 ibdev->create_cq = bnxt_re_create_cq;
505 ibdev->destroy_cq = bnxt_re_destroy_cq;
506 ibdev->poll_cq = bnxt_re_poll_cq;
507 ibdev->req_notify_cq = bnxt_re_req_notify_cq;
508
509 ibdev->get_dma_mr = bnxt_re_get_dma_mr;
510 ibdev->dereg_mr = bnxt_re_dereg_mr;
511 ibdev->alloc_mr = bnxt_re_alloc_mr;
512 ibdev->map_mr_sg = bnxt_re_map_mr_sg;
513
514 ibdev->reg_user_mr = bnxt_re_reg_user_mr;
515 ibdev->alloc_ucontext = bnxt_re_alloc_ucontext;
516 ibdev->dealloc_ucontext = bnxt_re_dealloc_ucontext;
517 ibdev->mmap = bnxt_re_mmap;
518 ibdev->get_hw_stats = bnxt_re_ib_get_hw_stats;
519 ibdev->alloc_hw_stats = bnxt_re_ib_alloc_hw_stats;
520
521 return ib_register_device(ibdev, NULL);
522 }
523
524 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
525 char *buf)
526 {
527 struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
528
529 return scnprintf(buf, PAGE_SIZE, "0x%x\n", rdev->en_dev->pdev->vendor);
530 }
531
532 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
533 char *buf)
534 {
535 struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
536
537 return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->dev_attr.fw_ver);
538 }
539
540 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
541 char *buf)
542 {
543 struct bnxt_re_dev *rdev = to_bnxt_re_dev(device, ibdev.dev);
544
545 return scnprintf(buf, PAGE_SIZE, "%s\n", rdev->ibdev.node_desc);
546 }
547
548 static DEVICE_ATTR(hw_rev, 0444, show_rev, NULL);
549 static DEVICE_ATTR(fw_rev, 0444, show_fw_ver, NULL);
550 static DEVICE_ATTR(hca_type, 0444, show_hca, NULL);
551
552 static struct device_attribute *bnxt_re_attributes[] = {
553 &dev_attr_hw_rev,
554 &dev_attr_fw_rev,
555 &dev_attr_hca_type
556 };
557
558 static void bnxt_re_dev_remove(struct bnxt_re_dev *rdev)
559 {
560 dev_put(rdev->netdev);
561 rdev->netdev = NULL;
562
563 mutex_lock(&bnxt_re_dev_lock);
564 list_del_rcu(&rdev->list);
565 mutex_unlock(&bnxt_re_dev_lock);
566
567 synchronize_rcu();
568 flush_workqueue(bnxt_re_wq);
569
570 ib_dealloc_device(&rdev->ibdev);
571 /* rdev is gone */
572 }
573
574 static struct bnxt_re_dev *bnxt_re_dev_add(struct net_device *netdev,
575 struct bnxt_en_dev *en_dev)
576 {
577 struct bnxt_re_dev *rdev;
578
579 /* Allocate bnxt_re_dev instance here */
580 rdev = (struct bnxt_re_dev *)ib_alloc_device(sizeof(*rdev));
581 if (!rdev) {
582 dev_err(NULL, "%s: bnxt_re_dev allocation failure!",
583 ROCE_DRV_MODULE_NAME);
584 return NULL;
585 }
586 /* Default values */
587 rdev->netdev = netdev;
588 dev_hold(rdev->netdev);
589 rdev->en_dev = en_dev;
590 rdev->id = rdev->en_dev->pdev->devfn;
591 INIT_LIST_HEAD(&rdev->qp_list);
592 mutex_init(&rdev->qp_lock);
593 atomic_set(&rdev->qp_count, 0);
594 atomic_set(&rdev->cq_count, 0);
595 atomic_set(&rdev->srq_count, 0);
596 atomic_set(&rdev->mr_count, 0);
597 atomic_set(&rdev->mw_count, 0);
598 rdev->cosq[0] = 0xFFFF;
599 rdev->cosq[1] = 0xFFFF;
600
601 mutex_lock(&bnxt_re_dev_lock);
602 list_add_tail_rcu(&rdev->list, &bnxt_re_dev_list);
603 mutex_unlock(&bnxt_re_dev_lock);
604 return rdev;
605 }
606
607 static int bnxt_re_aeq_handler(struct bnxt_qplib_rcfw *rcfw,
608 struct creq_func_event *aeqe)
609 {
610 switch (aeqe->event) {
611 case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR:
612 break;
613 case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR:
614 break;
615 case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR:
616 break;
617 case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR:
618 break;
619 case CREQ_FUNC_EVENT_EVENT_CQ_ERROR:
620 break;
621 case CREQ_FUNC_EVENT_EVENT_TQM_ERROR:
622 break;
623 case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR:
624 break;
625 case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR:
626 break;
627 case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR:
628 break;
629 case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR:
630 break;
631 case CREQ_FUNC_EVENT_EVENT_TIM_ERROR:
632 break;
633 default:
634 return -EINVAL;
635 }
636 return 0;
637 }
638
639 static int bnxt_re_cqn_handler(struct bnxt_qplib_nq *nq,
640 struct bnxt_qplib_cq *handle)
641 {
642 struct bnxt_re_cq *cq = container_of(handle, struct bnxt_re_cq,
643 qplib_cq);
644
645 if (!cq) {
646 dev_err(NULL, "%s: CQ is NULL, CQN not handled",
647 ROCE_DRV_MODULE_NAME);
648 return -EINVAL;
649 }
650 if (cq->ib_cq.comp_handler) {
651 /* Lock comp_handler? */
652 (*cq->ib_cq.comp_handler)(&cq->ib_cq, cq->ib_cq.cq_context);
653 }
654
655 return 0;
656 }
657
658 static void bnxt_re_cleanup_res(struct bnxt_re_dev *rdev)
659 {
660 int i;
661
662 if (rdev->nq[0].hwq.max_elements) {
663 for (i = 1; i < rdev->num_msix; i++)
664 bnxt_qplib_disable_nq(&rdev->nq[i - 1]);
665 }
666
667 if (rdev->qplib_res.rcfw)
668 bnxt_qplib_cleanup_res(&rdev->qplib_res);
669 }
670
671 static int bnxt_re_init_res(struct bnxt_re_dev *rdev)
672 {
673 int rc = 0, i;
674
675 bnxt_qplib_init_res(&rdev->qplib_res);
676
677 for (i = 1; i < rdev->num_msix ; i++) {
678 rc = bnxt_qplib_enable_nq(rdev->en_dev->pdev, &rdev->nq[i - 1],
679 i - 1, rdev->msix_entries[i].vector,
680 rdev->msix_entries[i].db_offset,
681 &bnxt_re_cqn_handler, NULL);
682
683 if (rc) {
684 dev_err(rdev_to_dev(rdev),
685 "Failed to enable NQ with rc = 0x%x", rc);
686 goto fail;
687 }
688 }
689 return 0;
690 fail:
691 return rc;
692 }
693
694 static void bnxt_re_free_nq_res(struct bnxt_re_dev *rdev, bool lock_wait)
695 {
696 int i;
697
698 for (i = 0; i < rdev->num_msix - 1; i++) {
699 bnxt_re_net_ring_free(rdev, rdev->nq[i].ring_id, lock_wait);
700 bnxt_qplib_free_nq(&rdev->nq[i]);
701 }
702 }
703
704 static void bnxt_re_free_res(struct bnxt_re_dev *rdev, bool lock_wait)
705 {
706 bnxt_re_free_nq_res(rdev, lock_wait);
707
708 if (rdev->qplib_res.dpi_tbl.max) {
709 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
710 &rdev->qplib_res.dpi_tbl,
711 &rdev->dpi_privileged);
712 }
713 if (rdev->qplib_res.rcfw) {
714 bnxt_qplib_free_res(&rdev->qplib_res);
715 rdev->qplib_res.rcfw = NULL;
716 }
717 }
718
719 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
720 {
721 int rc = 0, i;
722
723 /* Configure and allocate resources for qplib */
724 rdev->qplib_res.rcfw = &rdev->rcfw;
725 rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
726 if (rc)
727 goto fail;
728
729 rc = bnxt_qplib_alloc_res(&rdev->qplib_res, rdev->en_dev->pdev,
730 rdev->netdev, &rdev->dev_attr);
731 if (rc)
732 goto fail;
733
734 rc = bnxt_qplib_alloc_dpi(&rdev->qplib_res.dpi_tbl,
735 &rdev->dpi_privileged,
736 rdev);
737 if (rc)
738 goto dealloc_res;
739
740 for (i = 0; i < rdev->num_msix - 1; i++) {
741 rdev->nq[i].hwq.max_elements = BNXT_RE_MAX_CQ_COUNT +
742 BNXT_RE_MAX_SRQC_COUNT + 2;
743 rc = bnxt_qplib_alloc_nq(rdev->en_dev->pdev, &rdev->nq[i]);
744 if (rc) {
745 dev_err(rdev_to_dev(rdev), "Alloc Failed NQ%d rc:%#x",
746 i, rc);
747 goto dealloc_dpi;
748 }
749 rc = bnxt_re_net_ring_alloc
750 (rdev, rdev->nq[i].hwq.pbl[PBL_LVL_0].pg_map_arr,
751 rdev->nq[i].hwq.pbl[rdev->nq[i].hwq.level].pg_count,
752 HWRM_RING_ALLOC_CMPL,
753 BNXT_QPLIB_NQE_MAX_CNT - 1,
754 rdev->msix_entries[i + 1].ring_idx,
755 &rdev->nq[i].ring_id);
756 if (rc) {
757 dev_err(rdev_to_dev(rdev),
758 "Failed to allocate NQ fw id with rc = 0x%x",
759 rc);
760 goto free_nq;
761 }
762 }
763 return 0;
764 free_nq:
765 for (i = 0; i < rdev->num_msix - 1; i++)
766 bnxt_qplib_free_nq(&rdev->nq[i]);
767 dealloc_dpi:
768 bnxt_qplib_dealloc_dpi(&rdev->qplib_res,
769 &rdev->qplib_res.dpi_tbl,
770 &rdev->dpi_privileged);
771 dealloc_res:
772 bnxt_qplib_free_res(&rdev->qplib_res);
773
774 fail:
775 rdev->qplib_res.rcfw = NULL;
776 return rc;
777 }
778
779 static void bnxt_re_dispatch_event(struct ib_device *ibdev, struct ib_qp *qp,
780 u8 port_num, enum ib_event_type event)
781 {
782 struct ib_event ib_event;
783
784 ib_event.device = ibdev;
785 if (qp)
786 ib_event.element.qp = qp;
787 else
788 ib_event.element.port_num = port_num;
789 ib_event.event = event;
790 ib_dispatch_event(&ib_event);
791 }
792
793 #define HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN 0x02
794 static int bnxt_re_query_hwrm_pri2cos(struct bnxt_re_dev *rdev, u8 dir,
795 u64 *cid_map)
796 {
797 struct hwrm_queue_pri2cos_qcfg_input req = {0};
798 struct bnxt *bp = netdev_priv(rdev->netdev);
799 struct hwrm_queue_pri2cos_qcfg_output resp;
800 struct bnxt_en_dev *en_dev = rdev->en_dev;
801 struct bnxt_fw_msg fw_msg;
802 u32 flags = 0;
803 u8 *qcfgmap, *tmp_map;
804 int rc = 0, i;
805
806 if (!cid_map)
807 return -EINVAL;
808
809 memset(&fw_msg, 0, sizeof(fw_msg));
810 bnxt_re_init_hwrm_hdr(rdev, (void *)&req,
811 HWRM_QUEUE_PRI2COS_QCFG, -1, -1);
812 flags |= (dir & 0x01);
813 flags |= HWRM_QUEUE_PRI2COS_QCFG_INPUT_FLAGS_IVLAN;
814 req.flags = cpu_to_le32(flags);
815 req.port_id = bp->pf.port_id;
816
817 bnxt_re_fill_fw_msg(&fw_msg, (void *)&req, sizeof(req), (void *)&resp,
818 sizeof(resp), DFLT_HWRM_CMD_TIMEOUT);
819 rc = en_dev->en_ops->bnxt_send_fw_msg(en_dev, BNXT_ROCE_ULP, &fw_msg);
820 if (rc)
821 return rc;
822
823 if (resp.queue_cfg_info) {
824 dev_warn(rdev_to_dev(rdev),
825 "Asymmetric cos queue configuration detected");
826 dev_warn(rdev_to_dev(rdev),
827 " on device, QoS may not be fully functional\n");
828 }
829 qcfgmap = &resp.pri0_cos_queue_id;
830 tmp_map = (u8 *)cid_map;
831 for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
832 tmp_map[i] = qcfgmap[i];
833
834 return rc;
835 }
836
837 static bool bnxt_re_is_qp1_or_shadow_qp(struct bnxt_re_dev *rdev,
838 struct bnxt_re_qp *qp)
839 {
840 return (qp->ib_qp.qp_type == IB_QPT_GSI) || (qp == rdev->qp1_sqp);
841 }
842
843 static void bnxt_re_dev_stop(struct bnxt_re_dev *rdev)
844 {
845 int mask = IB_QP_STATE;
846 struct ib_qp_attr qp_attr;
847 struct bnxt_re_qp *qp;
848
849 qp_attr.qp_state = IB_QPS_ERR;
850 mutex_lock(&rdev->qp_lock);
851 list_for_each_entry(qp, &rdev->qp_list, list) {
852 /* Modify the state of all QPs except QP1/Shadow QP */
853 if (!bnxt_re_is_qp1_or_shadow_qp(rdev, qp)) {
854 if (qp->qplib_qp.state !=
855 CMDQ_MODIFY_QP_NEW_STATE_RESET &&
856 qp->qplib_qp.state !=
857 CMDQ_MODIFY_QP_NEW_STATE_ERR) {
858 bnxt_re_dispatch_event(&rdev->ibdev, &qp->ib_qp,
859 1, IB_EVENT_QP_FATAL);
860 bnxt_re_modify_qp(&qp->ib_qp, &qp_attr, mask,
861 NULL);
862 }
863 }
864 }
865 mutex_unlock(&rdev->qp_lock);
866 }
867
868 static int bnxt_re_update_gid(struct bnxt_re_dev *rdev)
869 {
870 struct bnxt_qplib_sgid_tbl *sgid_tbl = &rdev->qplib_res.sgid_tbl;
871 struct bnxt_qplib_gid gid;
872 u16 gid_idx, index;
873 int rc = 0;
874
875 if (!test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
876 return 0;
877
878 if (!sgid_tbl) {
879 dev_err(rdev_to_dev(rdev), "QPLIB: SGID table not allocated");
880 return -EINVAL;
881 }
882
883 for (index = 0; index < sgid_tbl->active; index++) {
884 gid_idx = sgid_tbl->hw_id[index];
885
886 if (!memcmp(&sgid_tbl->tbl[index], &bnxt_qplib_gid_zero,
887 sizeof(bnxt_qplib_gid_zero)))
888 continue;
889 /* need to modify the VLAN enable setting of non VLAN GID only
890 * as setting is done for VLAN GID while adding GID
891 */
892 if (sgid_tbl->vlan[index])
893 continue;
894
895 memcpy(&gid, &sgid_tbl->tbl[index], sizeof(gid));
896
897 rc = bnxt_qplib_update_sgid(sgid_tbl, &gid, gid_idx,
898 rdev->qplib_res.netdev->dev_addr);
899 }
900
901 return rc;
902 }
903
904 static u32 bnxt_re_get_priority_mask(struct bnxt_re_dev *rdev)
905 {
906 u32 prio_map = 0, tmp_map = 0;
907 struct net_device *netdev;
908 struct dcb_app app;
909
910 netdev = rdev->netdev;
911
912 memset(&app, 0, sizeof(app));
913 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
914 app.protocol = ETH_P_IBOE;
915 tmp_map = dcb_ieee_getapp_mask(netdev, &app);
916 prio_map = tmp_map;
917
918 app.selector = IEEE_8021QAZ_APP_SEL_DGRAM;
919 app.protocol = ROCE_V2_UDP_DPORT;
920 tmp_map = dcb_ieee_getapp_mask(netdev, &app);
921 prio_map |= tmp_map;
922
923 return prio_map;
924 }
925
926 static void bnxt_re_parse_cid_map(u8 prio_map, u8 *cid_map, u16 *cosq)
927 {
928 u16 prio;
929 u8 id;
930
931 for (prio = 0, id = 0; prio < 8; prio++) {
932 if (prio_map & (1 << prio)) {
933 cosq[id] = cid_map[prio];
934 id++;
935 if (id == 2) /* Max 2 tcs supported */
936 break;
937 }
938 }
939 }
940
941 static int bnxt_re_setup_qos(struct bnxt_re_dev *rdev)
942 {
943 u8 prio_map = 0;
944 u64 cid_map;
945 int rc;
946
947 /* Get priority for roce */
948 prio_map = bnxt_re_get_priority_mask(rdev);
949
950 if (prio_map == rdev->cur_prio_map)
951 return 0;
952 rdev->cur_prio_map = prio_map;
953 /* Get cosq id for this priority */
954 rc = bnxt_re_query_hwrm_pri2cos(rdev, 0, &cid_map);
955 if (rc) {
956 dev_warn(rdev_to_dev(rdev), "no cos for p_mask %x\n", prio_map);
957 return rc;
958 }
959 /* Parse CoS IDs for app priority */
960 bnxt_re_parse_cid_map(prio_map, (u8 *)&cid_map, rdev->cosq);
961
962 /* Config BONO. */
963 rc = bnxt_qplib_map_tc2cos(&rdev->qplib_res, rdev->cosq);
964 if (rc) {
965 dev_warn(rdev_to_dev(rdev), "no tc for cos{%x, %x}\n",
966 rdev->cosq[0], rdev->cosq[1]);
967 return rc;
968 }
969
970 /* Actual priorities are not programmed as they are already
971 * done by L2 driver; just enable or disable priority vlan tagging
972 */
973 if ((prio_map == 0 && rdev->qplib_res.prio) ||
974 (prio_map != 0 && !rdev->qplib_res.prio)) {
975 rdev->qplib_res.prio = prio_map ? true : false;
976
977 bnxt_re_update_gid(rdev);
978 }
979
980 return 0;
981 }
982
983 static void bnxt_re_ib_unreg(struct bnxt_re_dev *rdev, bool lock_wait)
984 {
985 int i, rc;
986
987 if (test_and_clear_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags)) {
988 for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++)
989 device_remove_file(&rdev->ibdev.dev,
990 bnxt_re_attributes[i]);
991 /* Cleanup ib dev */
992 bnxt_re_unregister_ib(rdev);
993 }
994 if (test_and_clear_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags))
995 cancel_delayed_work(&rdev->worker);
996
997 bnxt_re_cleanup_res(rdev);
998 bnxt_re_free_res(rdev, lock_wait);
999
1000 if (test_and_clear_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags)) {
1001 rc = bnxt_qplib_deinit_rcfw(&rdev->rcfw);
1002 if (rc)
1003 dev_warn(rdev_to_dev(rdev),
1004 "Failed to deinitialize RCFW: %#x", rc);
1005 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id,
1006 lock_wait);
1007 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1008 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1009 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, lock_wait);
1010 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1011 }
1012 if (test_and_clear_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags)) {
1013 rc = bnxt_re_free_msix(rdev, lock_wait);
1014 if (rc)
1015 dev_warn(rdev_to_dev(rdev),
1016 "Failed to free MSI-X vectors: %#x", rc);
1017 }
1018 if (test_and_clear_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags)) {
1019 rc = bnxt_re_unregister_netdev(rdev, lock_wait);
1020 if (rc)
1021 dev_warn(rdev_to_dev(rdev),
1022 "Failed to unregister with netdev: %#x", rc);
1023 }
1024 }
1025
1026 static void bnxt_re_set_resource_limits(struct bnxt_re_dev *rdev)
1027 {
1028 u32 i;
1029
1030 rdev->qplib_ctx.qpc_count = BNXT_RE_MAX_QPC_COUNT;
1031 rdev->qplib_ctx.mrw_count = BNXT_RE_MAX_MRW_COUNT;
1032 rdev->qplib_ctx.srqc_count = BNXT_RE_MAX_SRQC_COUNT;
1033 rdev->qplib_ctx.cq_count = BNXT_RE_MAX_CQ_COUNT;
1034 for (i = 0; i < MAX_TQM_ALLOC_REQ; i++)
1035 rdev->qplib_ctx.tqm_count[i] =
1036 rdev->dev_attr.tqm_alloc_reqs[i];
1037 }
1038
1039 /* worker thread for polling periodic events. Now used for QoS programming*/
1040 static void bnxt_re_worker(struct work_struct *work)
1041 {
1042 struct bnxt_re_dev *rdev = container_of(work, struct bnxt_re_dev,
1043 worker.work);
1044
1045 bnxt_re_setup_qos(rdev);
1046 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1047 }
1048
1049 static int bnxt_re_ib_reg(struct bnxt_re_dev *rdev)
1050 {
1051 int i, j, rc;
1052
1053 /* Registered a new RoCE device instance to netdev */
1054 rc = bnxt_re_register_netdev(rdev);
1055 if (rc) {
1056 pr_err("Failed to register with netedev: %#x\n", rc);
1057 return -EINVAL;
1058 }
1059 set_bit(BNXT_RE_FLAG_NETDEV_REGISTERED, &rdev->flags);
1060
1061 rc = bnxt_re_request_msix(rdev);
1062 if (rc) {
1063 pr_err("Failed to get MSI-X vectors: %#x\n", rc);
1064 rc = -EINVAL;
1065 goto fail;
1066 }
1067 set_bit(BNXT_RE_FLAG_GOT_MSIX, &rdev->flags);
1068
1069 /* Establish RCFW Communication Channel to initialize the context
1070 * memory for the function and all child VFs
1071 */
1072 rc = bnxt_qplib_alloc_rcfw_channel(rdev->en_dev->pdev, &rdev->rcfw,
1073 BNXT_RE_MAX_QPC_COUNT);
1074 if (rc)
1075 goto fail;
1076
1077 rc = bnxt_re_net_ring_alloc
1078 (rdev, rdev->rcfw.creq.pbl[PBL_LVL_0].pg_map_arr,
1079 rdev->rcfw.creq.pbl[rdev->rcfw.creq.level].pg_count,
1080 HWRM_RING_ALLOC_CMPL, BNXT_QPLIB_CREQE_MAX_CNT - 1,
1081 rdev->msix_entries[BNXT_RE_AEQ_IDX].ring_idx,
1082 &rdev->rcfw.creq_ring_id);
1083 if (rc) {
1084 pr_err("Failed to allocate CREQ: %#x\n", rc);
1085 goto free_rcfw;
1086 }
1087 rc = bnxt_qplib_enable_rcfw_channel
1088 (rdev->en_dev->pdev, &rdev->rcfw,
1089 rdev->msix_entries[BNXT_RE_AEQ_IDX].vector,
1090 rdev->msix_entries[BNXT_RE_AEQ_IDX].db_offset,
1091 0, &bnxt_re_aeq_handler);
1092 if (rc) {
1093 pr_err("Failed to enable RCFW channel: %#x\n", rc);
1094 goto free_ring;
1095 }
1096
1097 rc = bnxt_qplib_get_dev_attr(&rdev->rcfw, &rdev->dev_attr);
1098 if (rc)
1099 goto disable_rcfw;
1100 bnxt_re_set_resource_limits(rdev);
1101
1102 rc = bnxt_qplib_alloc_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx, 0);
1103 if (rc) {
1104 pr_err("Failed to allocate QPLIB context: %#x\n", rc);
1105 goto disable_rcfw;
1106 }
1107 rc = bnxt_re_net_stats_ctx_alloc(rdev,
1108 rdev->qplib_ctx.stats.dma_map,
1109 &rdev->qplib_ctx.stats.fw_id);
1110 if (rc) {
1111 pr_err("Failed to allocate stats context: %#x\n", rc);
1112 goto free_ctx;
1113 }
1114
1115 rc = bnxt_qplib_init_rcfw(&rdev->rcfw, &rdev->qplib_ctx, 0);
1116 if (rc) {
1117 pr_err("Failed to initialize RCFW: %#x\n", rc);
1118 goto free_sctx;
1119 }
1120 set_bit(BNXT_RE_FLAG_RCFW_CHANNEL_EN, &rdev->flags);
1121
1122 /* Resources based on the 'new' device caps */
1123 rc = bnxt_re_alloc_res(rdev);
1124 if (rc) {
1125 pr_err("Failed to allocate resources: %#x\n", rc);
1126 goto fail;
1127 }
1128 rc = bnxt_re_init_res(rdev);
1129 if (rc) {
1130 pr_err("Failed to initialize resources: %#x\n", rc);
1131 goto fail;
1132 }
1133
1134 rc = bnxt_re_setup_qos(rdev);
1135 if (rc)
1136 pr_info("RoCE priority not yet configured\n");
1137
1138 INIT_DELAYED_WORK(&rdev->worker, bnxt_re_worker);
1139 set_bit(BNXT_RE_FLAG_QOS_WORK_REG, &rdev->flags);
1140 schedule_delayed_work(&rdev->worker, msecs_to_jiffies(30000));
1141
1142 /* Register ib dev */
1143 rc = bnxt_re_register_ib(rdev);
1144 if (rc) {
1145 pr_err("Failed to register with IB: %#x\n", rc);
1146 goto fail;
1147 }
1148 dev_info(rdev_to_dev(rdev), "Device registered successfully");
1149 for (i = 0; i < ARRAY_SIZE(bnxt_re_attributes); i++) {
1150 rc = device_create_file(&rdev->ibdev.dev,
1151 bnxt_re_attributes[i]);
1152 if (rc) {
1153 dev_err(rdev_to_dev(rdev),
1154 "Failed to create IB sysfs: %#x", rc);
1155 /* Must clean up all created device files */
1156 for (j = 0; j < i; j++)
1157 device_remove_file(&rdev->ibdev.dev,
1158 bnxt_re_attributes[j]);
1159 bnxt_re_unregister_ib(rdev);
1160 goto fail;
1161 }
1162 }
1163 set_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags);
1164 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1165 &rdev->active_width);
1166 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_PORT_ACTIVE);
1167 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1, IB_EVENT_GID_CHANGE);
1168
1169 return 0;
1170 free_sctx:
1171 bnxt_re_net_stats_ctx_free(rdev, rdev->qplib_ctx.stats.fw_id, true);
1172 free_ctx:
1173 bnxt_qplib_free_ctx(rdev->en_dev->pdev, &rdev->qplib_ctx);
1174 disable_rcfw:
1175 bnxt_qplib_disable_rcfw_channel(&rdev->rcfw);
1176 free_ring:
1177 bnxt_re_net_ring_free(rdev, rdev->rcfw.creq_ring_id, true);
1178 free_rcfw:
1179 bnxt_qplib_free_rcfw_channel(&rdev->rcfw);
1180 fail:
1181 bnxt_re_ib_unreg(rdev, true);
1182 return rc;
1183 }
1184
1185 static void bnxt_re_dev_unreg(struct bnxt_re_dev *rdev)
1186 {
1187 struct bnxt_en_dev *en_dev = rdev->en_dev;
1188 struct net_device *netdev = rdev->netdev;
1189
1190 bnxt_re_dev_remove(rdev);
1191
1192 if (netdev)
1193 bnxt_re_dev_unprobe(netdev, en_dev);
1194 }
1195
1196 static int bnxt_re_dev_reg(struct bnxt_re_dev **rdev, struct net_device *netdev)
1197 {
1198 struct bnxt_en_dev *en_dev;
1199 int rc = 0;
1200
1201 if (!is_bnxt_re_dev(netdev))
1202 return -ENODEV;
1203
1204 en_dev = bnxt_re_dev_probe(netdev);
1205 if (IS_ERR(en_dev)) {
1206 if (en_dev != ERR_PTR(-ENODEV))
1207 pr_err("%s: Failed to probe\n", ROCE_DRV_MODULE_NAME);
1208 rc = PTR_ERR(en_dev);
1209 goto exit;
1210 }
1211 *rdev = bnxt_re_dev_add(netdev, en_dev);
1212 if (!*rdev) {
1213 rc = -ENOMEM;
1214 bnxt_re_dev_unprobe(netdev, en_dev);
1215 goto exit;
1216 }
1217 exit:
1218 return rc;
1219 }
1220
1221 static void bnxt_re_remove_one(struct bnxt_re_dev *rdev)
1222 {
1223 pci_dev_put(rdev->en_dev->pdev);
1224 }
1225
1226 /* Handle all deferred netevents tasks */
1227 static void bnxt_re_task(struct work_struct *work)
1228 {
1229 struct bnxt_re_work *re_work;
1230 struct bnxt_re_dev *rdev;
1231 int rc = 0;
1232
1233 re_work = container_of(work, struct bnxt_re_work, work);
1234 rdev = re_work->rdev;
1235
1236 if (re_work->event != NETDEV_REGISTER &&
1237 !test_bit(BNXT_RE_FLAG_IBDEV_REGISTERED, &rdev->flags))
1238 return;
1239
1240 switch (re_work->event) {
1241 case NETDEV_REGISTER:
1242 rc = bnxt_re_ib_reg(rdev);
1243 if (rc)
1244 dev_err(rdev_to_dev(rdev),
1245 "Failed to register with IB: %#x", rc);
1246 break;
1247 case NETDEV_UP:
1248 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1249 IB_EVENT_PORT_ACTIVE);
1250 break;
1251 case NETDEV_DOWN:
1252 bnxt_re_dev_stop(rdev);
1253 break;
1254 case NETDEV_CHANGE:
1255 if (!netif_carrier_ok(rdev->netdev))
1256 bnxt_re_dev_stop(rdev);
1257 else if (netif_carrier_ok(rdev->netdev))
1258 bnxt_re_dispatch_event(&rdev->ibdev, NULL, 1,
1259 IB_EVENT_PORT_ACTIVE);
1260 ib_get_eth_speed(&rdev->ibdev, 1, &rdev->active_speed,
1261 &rdev->active_width);
1262 break;
1263 default:
1264 break;
1265 }
1266 smp_mb__before_atomic();
1267 clear_bit(BNXT_RE_FLAG_TASK_IN_PROG, &rdev->flags);
1268 kfree(re_work);
1269 }
1270
1271 static void bnxt_re_init_one(struct bnxt_re_dev *rdev)
1272 {
1273 pci_dev_get(rdev->en_dev->pdev);
1274 }
1275
1276 /*
1277 * "Notifier chain callback can be invoked for the same chain from
1278 * different CPUs at the same time".
1279 *
1280 * For cases when the netdev is already present, our call to the
1281 * register_netdevice_notifier() will actually get the rtnl_lock()
1282 * before sending NETDEV_REGISTER and (if up) NETDEV_UP
1283 * events.
1284 *
1285 * But for cases when the netdev is not already present, the notifier
1286 * chain is subjected to be invoked from different CPUs simultaneously.
1287 *
1288 * This is protected by the netdev_mutex.
1289 */
1290 static int bnxt_re_netdev_event(struct notifier_block *notifier,
1291 unsigned long event, void *ptr)
1292 {
1293 struct net_device *real_dev, *netdev = netdev_notifier_info_to_dev(ptr);
1294 struct bnxt_re_work *re_work;
1295 struct bnxt_re_dev *rdev;
1296 int rc = 0;
1297 bool sch_work = false;
1298
1299 real_dev = rdma_vlan_dev_real_dev(netdev);
1300 if (!real_dev)
1301 real_dev = netdev;
1302
1303 rdev = bnxt_re_from_netdev(real_dev);
1304 if (!rdev && event != NETDEV_REGISTER)
1305 goto exit;
1306 if (real_dev != netdev)
1307 goto exit;
1308
1309 switch (event) {
1310 case NETDEV_REGISTER:
1311 if (rdev)
1312 break;
1313 rc = bnxt_re_dev_reg(&rdev, real_dev);
1314 if (rc == -ENODEV)
1315 break;
1316 if (rc) {
1317 pr_err("Failed to register with the device %s: %#x\n",
1318 real_dev->name, rc);
1319 break;
1320 }
1321 bnxt_re_init_one(rdev);
1322 sch_work = true;
1323 break;
1324
1325 case NETDEV_UNREGISTER:
1326 /* netdev notifier will call NETDEV_UNREGISTER again later since
1327 * we are still holding the reference to the netdev
1328 */
1329 if (test_bit(BNXT_RE_FLAG_TASK_IN_PROG, &rdev->flags))
1330 goto exit;
1331 bnxt_re_ib_unreg(rdev, false);
1332 bnxt_re_remove_one(rdev);
1333 bnxt_re_dev_unreg(rdev);
1334 break;
1335
1336 default:
1337 sch_work = true;
1338 break;
1339 }
1340 if (sch_work) {
1341 /* Allocate for the deferred task */
1342 re_work = kzalloc(sizeof(*re_work), GFP_ATOMIC);
1343 if (re_work) {
1344 re_work->rdev = rdev;
1345 re_work->event = event;
1346 re_work->vlan_dev = (real_dev == netdev ?
1347 NULL : netdev);
1348 INIT_WORK(&re_work->work, bnxt_re_task);
1349 set_bit(BNXT_RE_FLAG_TASK_IN_PROG, &rdev->flags);
1350 queue_work(bnxt_re_wq, &re_work->work);
1351 }
1352 }
1353
1354 exit:
1355 return NOTIFY_DONE;
1356 }
1357
1358 static struct notifier_block bnxt_re_netdev_notifier = {
1359 .notifier_call = bnxt_re_netdev_event
1360 };
1361
1362 static int __init bnxt_re_mod_init(void)
1363 {
1364 int rc = 0;
1365
1366 pr_info("%s: %s", ROCE_DRV_MODULE_NAME, version);
1367
1368 bnxt_re_wq = create_singlethread_workqueue("bnxt_re");
1369 if (!bnxt_re_wq)
1370 return -ENOMEM;
1371
1372 INIT_LIST_HEAD(&bnxt_re_dev_list);
1373
1374 rc = register_netdevice_notifier(&bnxt_re_netdev_notifier);
1375 if (rc) {
1376 pr_err("%s: Cannot register to netdevice_notifier",
1377 ROCE_DRV_MODULE_NAME);
1378 goto err_netdev;
1379 }
1380 return 0;
1381
1382 err_netdev:
1383 destroy_workqueue(bnxt_re_wq);
1384
1385 return rc;
1386 }
1387
1388 static void __exit bnxt_re_mod_exit(void)
1389 {
1390 struct bnxt_re_dev *rdev;
1391 LIST_HEAD(to_be_deleted);
1392
1393 mutex_lock(&bnxt_re_dev_lock);
1394 /* Free all adapter allocated resources */
1395 if (!list_empty(&bnxt_re_dev_list))
1396 list_splice_init(&bnxt_re_dev_list, &to_be_deleted);
1397 mutex_unlock(&bnxt_re_dev_lock);
1398
1399 list_for_each_entry(rdev, &to_be_deleted, list) {
1400 dev_info(rdev_to_dev(rdev), "Unregistering Device");
1401 bnxt_re_dev_stop(rdev);
1402 bnxt_re_ib_unreg(rdev, true);
1403 bnxt_re_remove_one(rdev);
1404 bnxt_re_dev_unreg(rdev);
1405 }
1406 unregister_netdevice_notifier(&bnxt_re_netdev_notifier);
1407 if (bnxt_re_wq)
1408 destroy_workqueue(bnxt_re_wq);
1409 }
1410
1411 module_init(bnxt_re_mod_init);
1412 module_exit(bnxt_re_mod_exit);
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