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