1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2025 Broadcom.
3
4#include <linux/module.h>
5#include <linux/pci.h>
6#include <linux/auxiliary_bus.h>
7
8#include <rdma/ib_verbs.h>
9
10#include "bng_res.h"
11#include "bng_sp.h"
12#include "bng_fw.h"
13#include "bnge.h"
14#include "bnge_auxr.h"
15#include "bng_re.h"
16#include "bnge_hwrm.h"
17#include "bng_debugfs.h"
18
19MODULE_AUTHOR("Siva Reddy Kallam <siva.kallam@broadcom.com>");
20MODULE_DESCRIPTION(BNG_RE_DESC);
21MODULE_LICENSE("Dual BSD/GPL");
22
23static struct bng_re_dev *bng_re_dev_add(struct auxiliary_device *adev,
24 struct bnge_auxr_dev *aux_dev)
25{
26 struct bng_re_dev *rdev;
27
28 /* Allocate bng_re_dev instance */
29 rdev = ib_alloc_device(bng_re_dev, ibdev);
30 if (!rdev) {
31 pr_err("%s: bng_re_dev allocation failure!", KBUILD_MODNAME);
32 return NULL;
33 }
34
35 /* Assign auxiliary device specific data */
36 rdev->netdev = aux_dev->net;
37 rdev->aux_dev = aux_dev;
38 rdev->adev = adev;
39 rdev->fn_id = rdev->aux_dev->pdev->devfn;
40
41 return rdev;
42}
43
44
45static int bng_re_register_netdev(struct bng_re_dev *rdev)
46{
47 struct bnge_auxr_dev *aux_dev;
48
49 aux_dev = rdev->aux_dev;
50 return bnge_register_dev(aux_dev, rdev->adev);
51}
52
53static void bng_re_destroy_chip_ctx(struct bng_re_dev *rdev)
54{
55 struct bng_re_chip_ctx *chip_ctx;
56
57 if (!rdev->chip_ctx)
58 return;
59
60 kfree(objp: rdev->dev_attr);
61 rdev->dev_attr = NULL;
62
63 chip_ctx = rdev->chip_ctx;
64 rdev->chip_ctx = NULL;
65 rdev->rcfw.res = NULL;
66 rdev->bng_res.cctx = NULL;
67 rdev->bng_res.pdev = NULL;
68 kfree(objp: chip_ctx);
69}
70
71static int bng_re_setup_chip_ctx(struct bng_re_dev *rdev)
72{
73 struct bng_re_chip_ctx *chip_ctx;
74 struct bnge_auxr_dev *aux_dev;
75 int rc = -ENOMEM;
76
77 aux_dev = rdev->aux_dev;
78 rdev->bng_res.pdev = aux_dev->pdev;
79 rdev->rcfw.res = &rdev->bng_res;
80 chip_ctx = kzalloc(sizeof(*chip_ctx), GFP_KERNEL);
81 if (!chip_ctx)
82 return -ENOMEM;
83 chip_ctx->chip_num = aux_dev->chip_num;
84 chip_ctx->hw_stats_size = aux_dev->hw_ring_stats_size;
85
86 rdev->chip_ctx = chip_ctx;
87 rdev->bng_res.cctx = rdev->chip_ctx;
88 rdev->dev_attr = kzalloc(sizeof(*rdev->dev_attr), GFP_KERNEL);
89 if (!rdev->dev_attr)
90 goto free_chip_ctx;
91 rdev->bng_res.dattr = rdev->dev_attr;
92
93 return 0;
94free_chip_ctx:
95 kfree(objp: rdev->chip_ctx);
96 rdev->chip_ctx = NULL;
97 return rc;
98}
99
100static void bng_re_init_hwrm_hdr(struct input *hdr, u16 opcd)
101{
102 hdr->req_type = cpu_to_le16(opcd);
103 hdr->cmpl_ring = cpu_to_le16(-1);
104 hdr->target_id = cpu_to_le16(-1);
105}
106
107static void bng_re_fill_fw_msg(struct bnge_fw_msg *fw_msg, void *msg,
108 int msg_len, void *resp, int resp_max_len,
109 int timeout)
110{
111 fw_msg->msg = msg;
112 fw_msg->msg_len = msg_len;
113 fw_msg->resp = resp;
114 fw_msg->resp_max_len = resp_max_len;
115 fw_msg->timeout = timeout;
116}
117
118static int bng_re_net_ring_free(struct bng_re_dev *rdev,
119 u16 fw_ring_id, int type)
120{
121 struct bnge_auxr_dev *aux_dev = rdev->aux_dev;
122 struct hwrm_ring_free_input req = {};
123 struct hwrm_ring_free_output resp;
124 struct bnge_fw_msg fw_msg = {};
125 int rc = -EINVAL;
126
127 if (!rdev)
128 return rc;
129
130 if (!aux_dev)
131 return rc;
132
133 bng_re_init_hwrm_hdr(hdr: (void *)&req, opcd: HWRM_RING_FREE);
134 req.ring_type = type;
135 req.ring_id = cpu_to_le16(fw_ring_id);
136 bng_re_fill_fw_msg(fw_msg: &fw_msg, msg: (void *)&req, msg_len: sizeof(req), resp: (void *)&resp,
137 resp_max_len: sizeof(resp), timeout: BNGE_DFLT_HWRM_CMD_TIMEOUT);
138 rc = bnge_send_msg(aux_dev, &fw_msg);
139 if (rc)
140 ibdev_err(ibdev: &rdev->ibdev, format: "Failed to free HW ring:%d :%#x",
141 req.ring_id, rc);
142 return rc;
143}
144
145static int bng_re_net_ring_alloc(struct bng_re_dev *rdev,
146 struct bng_re_ring_attr *ring_attr,
147 u16 *fw_ring_id)
148{
149 struct bnge_auxr_dev *aux_dev = rdev->aux_dev;
150 struct hwrm_ring_alloc_input req = {};
151 struct hwrm_ring_alloc_output resp;
152 struct bnge_fw_msg fw_msg = {};
153 int rc = -EINVAL;
154
155 if (!aux_dev)
156 return rc;
157
158 bng_re_init_hwrm_hdr(hdr: (void *)&req, opcd: HWRM_RING_ALLOC);
159 req.enables = 0;
160 req.page_tbl_addr = cpu_to_le64(ring_attr->dma_arr[0]);
161 if (ring_attr->pages > 1) {
162 /* Page size is in log2 units */
163 req.page_size = BNGE_PAGE_SHIFT;
164 req.page_tbl_depth = 1;
165 }
166 req.fbo = 0;
167 /* Association of ring index with doorbell index and MSIX number */
168 req.logical_id = cpu_to_le16(ring_attr->lrid);
169 req.length = cpu_to_le32(ring_attr->depth + 1);
170 req.ring_type = ring_attr->type;
171 req.int_mode = ring_attr->mode;
172 bng_re_fill_fw_msg(fw_msg: &fw_msg, msg: (void *)&req, msg_len: sizeof(req), resp: (void *)&resp,
173 resp_max_len: sizeof(resp), timeout: BNGE_DFLT_HWRM_CMD_TIMEOUT);
174 rc = bnge_send_msg(aux_dev, &fw_msg);
175 if (!rc)
176 *fw_ring_id = le16_to_cpu(resp.ring_id);
177
178 return rc;
179}
180
181static int bng_re_stats_ctx_free(struct bng_re_dev *rdev)
182{
183 struct bnge_auxr_dev *aux_dev = rdev->aux_dev;
184 struct hwrm_stat_ctx_free_input req = {};
185 struct hwrm_stat_ctx_free_output resp = {};
186 struct bnge_fw_msg fw_msg = {};
187 int rc = -EINVAL;
188
189 if (!aux_dev)
190 return rc;
191
192 bng_re_init_hwrm_hdr(hdr: (void *)&req, opcd: HWRM_STAT_CTX_FREE);
193 req.stat_ctx_id = cpu_to_le32(rdev->stats_ctx.fw_id);
194 bng_re_fill_fw_msg(fw_msg: &fw_msg, msg: (void *)&req, msg_len: sizeof(req), resp: (void *)&resp,
195 resp_max_len: sizeof(resp), timeout: BNGE_DFLT_HWRM_CMD_TIMEOUT);
196 rc = bnge_send_msg(aux_dev, &fw_msg);
197 if (rc)
198 ibdev_err(ibdev: &rdev->ibdev, format: "Failed to free HW stats context %#x",
199 rc);
200
201 return rc;
202}
203
204static int bng_re_stats_ctx_alloc(struct bng_re_dev *rdev)
205{
206 struct bnge_auxr_dev *aux_dev = rdev->aux_dev;
207 struct bng_re_stats *stats = &rdev->stats_ctx;
208 struct hwrm_stat_ctx_alloc_output resp = {};
209 struct hwrm_stat_ctx_alloc_input req = {};
210 struct bnge_fw_msg fw_msg = {};
211 int rc = -EINVAL;
212
213 stats->fw_id = BNGE_INVALID_STATS_CTX_ID;
214
215 if (!aux_dev)
216 return rc;
217
218 bng_re_init_hwrm_hdr(hdr: (void *)&req, opcd: HWRM_STAT_CTX_ALLOC);
219 req.update_period_ms = cpu_to_le32(1000);
220 req.stats_dma_addr = cpu_to_le64(stats->dma_map);
221 req.stats_dma_length = cpu_to_le16(rdev->chip_ctx->hw_stats_size);
222 req.stat_ctx_flags = STAT_CTX_ALLOC_REQ_STAT_CTX_FLAGS_ROCE;
223 bng_re_fill_fw_msg(fw_msg: &fw_msg, msg: (void *)&req, msg_len: sizeof(req), resp: (void *)&resp,
224 resp_max_len: sizeof(resp), timeout: BNGE_DFLT_HWRM_CMD_TIMEOUT);
225 rc = bnge_send_msg(aux_dev, &fw_msg);
226 if (!rc)
227 stats->fw_id = le32_to_cpu(resp.stat_ctx_id);
228 return rc;
229}
230
231static void bng_re_query_hwrm_version(struct bng_re_dev *rdev)
232{
233 struct bnge_auxr_dev *aux_dev = rdev->aux_dev;
234 struct hwrm_ver_get_output ver_get_resp = {};
235 struct hwrm_ver_get_input ver_get_req = {};
236 struct bng_re_chip_ctx *cctx;
237 struct bnge_fw_msg fw_msg = {};
238 int rc;
239
240 bng_re_init_hwrm_hdr(hdr: (void *)&ver_get_req, opcd: HWRM_VER_GET);
241 ver_get_req.hwrm_intf_maj = HWRM_VERSION_MAJOR;
242 ver_get_req.hwrm_intf_min = HWRM_VERSION_MINOR;
243 ver_get_req.hwrm_intf_upd = HWRM_VERSION_UPDATE;
244 bng_re_fill_fw_msg(fw_msg: &fw_msg, msg: (void *)&ver_get_req, msg_len: sizeof(ver_get_req),
245 resp: (void *)&ver_get_resp, resp_max_len: sizeof(ver_get_resp),
246 timeout: BNGE_DFLT_HWRM_CMD_TIMEOUT);
247 rc = bnge_send_msg(aux_dev, &fw_msg);
248 if (rc) {
249 ibdev_err(ibdev: &rdev->ibdev, format: "Failed to query HW version, rc = 0x%x",
250 rc);
251 return;
252 }
253
254 cctx = rdev->chip_ctx;
255 cctx->hwrm_intf_ver =
256 (u64)le16_to_cpu(ver_get_resp.hwrm_intf_major) << 48 |
257 (u64)le16_to_cpu(ver_get_resp.hwrm_intf_minor) << 32 |
258 (u64)le16_to_cpu(ver_get_resp.hwrm_intf_build) << 16 |
259 le16_to_cpu(ver_get_resp.hwrm_intf_patch);
260
261 cctx->hwrm_cmd_max_timeout = le16_to_cpu(ver_get_resp.max_req_timeout);
262
263 if (!cctx->hwrm_cmd_max_timeout)
264 cctx->hwrm_cmd_max_timeout = BNG_ROCE_FW_MAX_TIMEOUT;
265}
266
267static void bng_re_dev_uninit(struct bng_re_dev *rdev)
268{
269 int rc;
270 bng_re_debugfs_rem_pdev(rdev);
271
272 if (test_and_clear_bit(BNG_RE_FLAG_RCFW_CHANNEL_EN, addr: &rdev->flags)) {
273 rc = bng_re_deinit_rcfw(rcfw: &rdev->rcfw);
274 if (rc)
275 ibdev_warn(ibdev: &rdev->ibdev,
276 format: "Failed to deinitialize RCFW: %#x", rc);
277 bng_re_stats_ctx_free(rdev);
278 bng_re_free_stats_ctx_mem(pdev: rdev->bng_res.pdev, stats: &rdev->stats_ctx);
279 bng_re_disable_rcfw_channel(rcfw: &rdev->rcfw);
280 bng_re_net_ring_free(rdev, fw_ring_id: rdev->rcfw.creq.ring_id,
281 type: RING_ALLOC_REQ_RING_TYPE_NQ);
282 bng_re_free_rcfw_channel(rcfw: &rdev->rcfw);
283 }
284
285 kfree(objp: rdev->nqr);
286 rdev->nqr = NULL;
287 bng_re_destroy_chip_ctx(rdev);
288 if (test_and_clear_bit(BNG_RE_FLAG_NETDEV_REGISTERED, addr: &rdev->flags))
289 bnge_unregister_dev(rdev->aux_dev);
290}
291
292static int bng_re_dev_init(struct bng_re_dev *rdev)
293{
294 struct bng_re_ring_attr rattr = {};
295 struct bng_re_creq_ctx *creq;
296 u32 db_offt;
297 int vid;
298 u8 type;
299 int rc;
300
301 /* Registered a new RoCE device instance to netdev */
302 rc = bng_re_register_netdev(rdev);
303 if (rc) {
304 ibdev_err(ibdev: &rdev->ibdev,
305 format: "Failed to register with netedev: %#x\n", rc);
306 return -EINVAL;
307 }
308
309 set_bit(BNG_RE_FLAG_NETDEV_REGISTERED, addr: &rdev->flags);
310
311 if (rdev->aux_dev->auxr_info->msix_requested < BNG_RE_MIN_MSIX) {
312 ibdev_err(ibdev: &rdev->ibdev,
313 format: "RoCE requires minimum 2 MSI-X vectors, but only %d reserved\n",
314 rdev->aux_dev->auxr_info->msix_requested);
315 bnge_unregister_dev(rdev->aux_dev);
316 clear_bit(BNG_RE_FLAG_NETDEV_REGISTERED, addr: &rdev->flags);
317 return -EINVAL;
318 }
319 ibdev_dbg(&rdev->ibdev, "Got %d MSI-X vectors\n",
320 rdev->aux_dev->auxr_info->msix_requested);
321
322 rc = bng_re_setup_chip_ctx(rdev);
323 if (rc) {
324 bnge_unregister_dev(rdev->aux_dev);
325 clear_bit(BNG_RE_FLAG_NETDEV_REGISTERED, addr: &rdev->flags);
326 ibdev_err(ibdev: &rdev->ibdev, format: "Failed to get chip context\n");
327 return -EINVAL;
328 }
329
330 bng_re_query_hwrm_version(rdev);
331
332 rc = bng_re_alloc_fw_channel(res: &rdev->bng_res, rcfw: &rdev->rcfw);
333 if (rc) {
334 ibdev_err(ibdev: &rdev->ibdev,
335 format: "Failed to allocate RCFW Channel: %#x\n", rc);
336 goto fail;
337 }
338
339 /* Allocate nq record memory */
340 rdev->nqr = kzalloc(sizeof(*rdev->nqr), GFP_KERNEL);
341 if (!rdev->nqr) {
342 bng_re_destroy_chip_ctx(rdev);
343 bnge_unregister_dev(rdev->aux_dev);
344 clear_bit(BNG_RE_FLAG_NETDEV_REGISTERED, addr: &rdev->flags);
345 return -ENOMEM;
346 }
347
348 rdev->nqr->num_msix = rdev->aux_dev->auxr_info->msix_requested;
349 memcpy(rdev->nqr->msix_entries, rdev->aux_dev->msix_info,
350 sizeof(struct bnge_msix_info) * rdev->nqr->num_msix);
351
352 type = RING_ALLOC_REQ_RING_TYPE_NQ;
353 creq = &rdev->rcfw.creq;
354 rattr.dma_arr = creq->hwq.pbl[BNG_PBL_LVL_0].pg_map_arr;
355 rattr.pages = creq->hwq.pbl[creq->hwq.level].pg_count;
356 rattr.type = type;
357 rattr.mode = RING_ALLOC_REQ_INT_MODE_MSIX;
358 rattr.depth = BNG_FW_CREQE_MAX_CNT - 1;
359 rattr.lrid = rdev->nqr->msix_entries[BNG_RE_CREQ_NQ_IDX].ring_idx;
360 rc = bng_re_net_ring_alloc(rdev, ring_attr: &rattr, fw_ring_id: &creq->ring_id);
361 if (rc) {
362 ibdev_err(ibdev: &rdev->ibdev, format: "Failed to allocate CREQ: %#x\n", rc);
363 goto free_rcfw;
364 }
365 db_offt = rdev->nqr->msix_entries[BNG_RE_CREQ_NQ_IDX].db_offset;
366 vid = rdev->nqr->msix_entries[BNG_RE_CREQ_NQ_IDX].vector;
367
368 rc = bng_re_enable_fw_channel(rcfw: &rdev->rcfw,
369 msix_vector: vid, cp_bar_reg_off: db_offt);
370 if (rc) {
371 ibdev_err(ibdev: &rdev->ibdev, format: "Failed to enable RCFW channel: %#x\n",
372 rc);
373 goto free_ring;
374 }
375
376 rc = bng_re_get_dev_attr(rcfw: &rdev->rcfw);
377 if (rc)
378 goto disable_rcfw;
379
380 bng_re_debugfs_add_pdev(rdev);
381 rc = bng_re_alloc_stats_ctx_mem(pdev: rdev->bng_res.pdev, cctx: rdev->chip_ctx,
382 stats: &rdev->stats_ctx);
383 if (rc) {
384 ibdev_err(ibdev: &rdev->ibdev,
385 format: "Failed to allocate stats context: %#x\n", rc);
386 goto disable_rcfw;
387 }
388
389 rc = bng_re_stats_ctx_alloc(rdev);
390 if (rc) {
391 ibdev_err(ibdev: &rdev->ibdev,
392 format: "Failed to allocate QPLIB context: %#x\n", rc);
393 goto free_stats_ctx;
394 }
395
396 rc = bng_re_init_rcfw(rcfw: &rdev->rcfw, stats_ctx: &rdev->stats_ctx);
397 if (rc) {
398 ibdev_err(ibdev: &rdev->ibdev,
399 format: "Failed to initialize RCFW: %#x\n", rc);
400 goto free_sctx;
401 }
402 set_bit(BNG_RE_FLAG_RCFW_CHANNEL_EN, addr: &rdev->flags);
403
404 return 0;
405free_sctx:
406 bng_re_stats_ctx_free(rdev);
407free_stats_ctx:
408 bng_re_free_stats_ctx_mem(pdev: rdev->bng_res.pdev, stats: &rdev->stats_ctx);
409disable_rcfw:
410 bng_re_disable_rcfw_channel(rcfw: &rdev->rcfw);
411free_ring:
412 bng_re_net_ring_free(rdev, fw_ring_id: rdev->rcfw.creq.ring_id, type);
413free_rcfw:
414 bng_re_free_rcfw_channel(rcfw: &rdev->rcfw);
415fail:
416 bng_re_dev_uninit(rdev);
417 return rc;
418}
419
420static int bng_re_add_device(struct auxiliary_device *adev)
421{
422 struct bnge_auxr_priv *auxr_priv =
423 container_of(adev, struct bnge_auxr_priv, aux_dev);
424 struct bng_re_en_dev_info *dev_info;
425 struct bng_re_dev *rdev;
426 int rc;
427
428 dev_info = auxiliary_get_drvdata(auxdev: adev);
429
430 rdev = bng_re_dev_add(adev, aux_dev: auxr_priv->auxr_dev);
431 if (!rdev) {
432 rc = -ENOMEM;
433 goto exit;
434 }
435
436 dev_info->rdev = rdev;
437
438 rc = bng_re_dev_init(rdev);
439 if (rc)
440 goto re_dev_dealloc;
441
442 return 0;
443
444re_dev_dealloc:
445 ib_dealloc_device(device: &rdev->ibdev);
446exit:
447 return rc;
448}
449
450
451static void bng_re_remove_device(struct bng_re_dev *rdev,
452 struct auxiliary_device *aux_dev)
453{
454 bng_re_dev_uninit(rdev);
455 ib_dealloc_device(device: &rdev->ibdev);
456}
457
458
459static int bng_re_probe(struct auxiliary_device *adev,
460 const struct auxiliary_device_id *id)
461{
462 struct bnge_auxr_priv *aux_priv =
463 container_of(adev, struct bnge_auxr_priv, aux_dev);
464 struct bng_re_en_dev_info *en_info;
465 int rc;
466
467 en_info = kzalloc(sizeof(*en_info), GFP_KERNEL);
468 if (!en_info)
469 return -ENOMEM;
470
471 en_info->auxr_dev = aux_priv->auxr_dev;
472
473 auxiliary_set_drvdata(auxdev: adev, data: en_info);
474
475 rc = bng_re_add_device(adev);
476 if (rc)
477 kfree(objp: en_info);
478
479 return rc;
480}
481
482static void bng_re_remove(struct auxiliary_device *adev)
483{
484 struct bng_re_en_dev_info *dev_info = auxiliary_get_drvdata(auxdev: adev);
485 struct bng_re_dev *rdev;
486
487 rdev = dev_info->rdev;
488
489 if (rdev)
490 bng_re_remove_device(rdev, aux_dev: adev);
491 kfree(objp: dev_info);
492}
493
494static const struct auxiliary_device_id bng_re_id_table[] = {
495 { .name = BNG_RE_ADEV_NAME ".rdma", },
496 {},
497};
498
499MODULE_DEVICE_TABLE(auxiliary, bng_re_id_table);
500
501static struct auxiliary_driver bng_re_driver = {
502 .name = "rdma",
503 .probe = bng_re_probe,
504 .remove = bng_re_remove,
505 .id_table = bng_re_id_table,
506};
507
508static int __init bng_re_mod_init(void)
509{
510 int rc;
511
512
513 bng_re_register_debugfs();
514
515 rc = auxiliary_driver_register(&bng_re_driver);
516 if (rc) {
517 pr_err("%s: Failed to register auxiliary driver\n",
518 KBUILD_MODNAME);
519 goto unreg_debugfs;
520 }
521 return 0;
522unreg_debugfs:
523 bng_re_unregister_debugfs();
524 return rc;
525}
526
527static void __exit bng_re_mod_exit(void)
528{
529 auxiliary_driver_unregister(auxdrv: &bng_re_driver);
530 bng_re_unregister_debugfs();
531}
532
533module_init(bng_re_mod_init);
534module_exit(bng_re_mod_exit);
535

source code of linux/drivers/infiniband/hw/bng_re/bng_dev.c