1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009-2013, 2016 Chelsio, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #define LINUXKPI_PARAM_PREFIX iw_cxgbe_ 38 39 #include "opt_inet.h" 40 41 #ifdef TCP_OFFLOAD 42 #include <asm/pgtable.h> 43 #include <linux/page.h> 44 #include <rdma/ib_verbs.h> 45 #include <rdma/ib_user_verbs.h> 46 47 #include "iw_cxgbe.h" 48 #include "user.h" 49 50 static int fastreg_support = 1; 51 module_param(fastreg_support, int, 0644); 52 MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default = 1)"); 53 54 static int c4iw_modify_port(struct ib_device *ibdev, 55 u8 port, int port_modify_mask, 56 struct ib_port_modify *props) 57 { 58 return -ENOSYS; 59 } 60 61 static struct ib_ah *c4iw_ah_create(struct ib_pd *pd, 62 struct ib_ah_attr *ah_attr, 63 struct ib_udata *udata) 64 { 65 return ERR_PTR(-ENOSYS); 66 } 67 68 static int c4iw_ah_destroy(struct ib_ah *ah) 69 { 70 return -ENOSYS; 71 } 72 73 static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) 74 { 75 return -ENOSYS; 76 } 77 78 static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) 79 { 80 return -ENOSYS; 81 } 82 83 static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags, 84 u8 port_num, const struct ib_wc *in_wc, 85 const struct ib_grh *in_grh, 86 const struct ib_mad_hdr *in_mad, 87 size_t in_mad_size, 88 struct ib_mad_hdr *out_mad, 89 size_t *out_mad_size, 90 u16 *out_mad_pkey_index) 91 92 { 93 return -ENOSYS; 94 } 95 96 void _c4iw_free_ucontext(struct kref *kref) 97 { 98 struct c4iw_ucontext *ucontext; 99 struct c4iw_dev *rhp; 100 struct c4iw_mm_entry *mm, *tmp; 101 102 ucontext = container_of(kref, struct c4iw_ucontext, kref); 103 rhp = to_c4iw_dev(ucontext->ibucontext.device); 104 105 CTR2(KTR_IW_CXGBE, "%s ucontext %p", __func__, ucontext); 106 list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry) 107 kfree(mm); 108 c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx); 109 kfree(ucontext); 110 } 111 112 static int c4iw_dealloc_ucontext(struct ib_ucontext *context) 113 { 114 struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context); 115 116 CTR2(KTR_IW_CXGBE, "%s context %p", __func__, context); 117 c4iw_put_ucontext(ucontext); 118 return 0; 119 } 120 121 static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev, 122 struct ib_udata *udata) 123 { 124 struct c4iw_ucontext *context; 125 struct c4iw_dev *rhp = to_c4iw_dev(ibdev); 126 static int warned; 127 struct c4iw_alloc_ucontext_resp uresp; 128 int ret = 0; 129 struct c4iw_mm_entry *mm = NULL; 130 131 PDBG("%s ibdev %p\n", __func__, ibdev); 132 context = kzalloc(sizeof(*context), GFP_KERNEL); 133 if (!context) { 134 ret = -ENOMEM; 135 goto err; 136 } 137 138 c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx); 139 INIT_LIST_HEAD(&context->mmaps); 140 spin_lock_init(&context->mmap_lock); 141 kref_init(&context->kref); 142 143 if (udata->outlen < sizeof(uresp) - sizeof(uresp.reserved)) { 144 if (!warned++) 145 log(LOG_ERR, "%s Warning - downlevel libcxgb4 " 146 "(non-fatal), device status page disabled.\n", 147 __func__); 148 rhp->rdev.flags |= T4_STATUS_PAGE_DISABLED; 149 } else { 150 151 mm = kmalloc(sizeof *mm, GFP_KERNEL); 152 if (!mm) 153 goto err_free; 154 155 uresp.status_page_size = PAGE_SIZE; 156 157 spin_lock(&context->mmap_lock); 158 uresp.status_page_key = context->key; 159 context->key += PAGE_SIZE; 160 spin_unlock(&context->mmap_lock); 161 162 ret = ib_copy_to_udata(udata, &uresp, 163 sizeof(uresp) - sizeof(uresp.reserved)); 164 if (ret) 165 goto err_mm; 166 167 mm->key = uresp.status_page_key; 168 mm->addr = vtophys(rhp->rdev.status_page); 169 mm->len = PAGE_SIZE; 170 insert_mmap(context, mm); 171 } 172 return &context->ibucontext; 173 err_mm: 174 kfree(mm); 175 err_free: 176 kfree(context); 177 err: 178 return ERR_PTR(ret); 179 } 180 181 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) 182 { 183 int len = vma->vm_end - vma->vm_start; 184 u32 key = vma->vm_pgoff << PAGE_SHIFT; 185 struct c4iw_rdev *rdev; 186 int ret = 0; 187 struct c4iw_mm_entry *mm; 188 struct c4iw_ucontext *ucontext; 189 u64 addr = 0; 190 191 CTR4(KTR_IW_CXGBE, "%s:1 ctx %p vma %p, vm_start %u", __func__, 192 context, vma, vma->vm_start); 193 194 CTR4(KTR_IW_CXGBE, "%s:1a pgoff 0x%lx key 0x%x len %d", __func__, 195 vma->vm_pgoff, key, len); 196 197 if (vma->vm_start & (PAGE_SIZE-1)) { 198 CTR3(KTR_IW_CXGBE, "%s:2 unaligned vm_start %u vma %p", 199 __func__, vma->vm_start, vma); 200 return -EINVAL; 201 } 202 203 rdev = &(to_c4iw_dev(context->device)->rdev); 204 ucontext = to_c4iw_ucontext(context); 205 206 mm = remove_mmap(ucontext, key, len); 207 if (!mm) { 208 CTR4(KTR_IW_CXGBE, "%s:3 ucontext %p key %u len %u", __func__, 209 ucontext, key, len); 210 return -EINVAL; 211 } 212 addr = mm->addr; 213 kfree(mm); 214 215 /* user DB-GTS registers if addr in udbs_res range, 216 * else WQ or CQ memory. 217 * */ 218 if (rdev->adap->iwt.wc_en && addr >= rdev->bar2_pa && 219 addr < rdev->bar2_pa + rdev->bar2_len) 220 vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot); 221 222 ret = io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT, 223 len, vma->vm_page_prot); 224 CTR4(KTR_IW_CXGBE, "%s:4 ctx %p vma %p ret %u", __func__, context, vma, 225 ret); 226 return ret; 227 } 228 229 static int 230 c4iw_deallocate_pd(struct ib_pd *pd) 231 { 232 struct c4iw_pd *php = to_c4iw_pd(pd); 233 struct c4iw_dev *rhp = php->rhp; 234 235 CTR3(KTR_IW_CXGBE, "%s: pd %p, pdid 0x%x", __func__, pd, php->pdid); 236 237 c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid); 238 mutex_lock(&rhp->rdev.stats.lock); 239 rhp->rdev.stats.pd.cur--; 240 mutex_unlock(&rhp->rdev.stats.lock); 241 kfree(php); 242 243 return (0); 244 } 245 246 static struct ib_pd * 247 c4iw_allocate_pd(struct ib_device *ibdev, struct ib_ucontext *context, 248 struct ib_udata *udata) 249 { 250 struct c4iw_pd *php; 251 u32 pdid; 252 struct c4iw_dev *rhp; 253 254 CTR4(KTR_IW_CXGBE, "%s: ibdev %p, context %p, data %p", __func__, ibdev, 255 context, udata); 256 rhp = (struct c4iw_dev *) ibdev; 257 pdid = c4iw_get_resource(&rhp->rdev.resource.pdid_table); 258 if (!pdid) 259 return ERR_PTR(-EINVAL); 260 php = kzalloc(sizeof(*php), GFP_KERNEL); 261 if (!php) { 262 c4iw_put_resource(&rhp->rdev.resource.pdid_table, pdid); 263 return ERR_PTR(-ENOMEM); 264 } 265 php->pdid = pdid; 266 php->rhp = rhp; 267 if (context) { 268 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) { 269 c4iw_deallocate_pd(&php->ibpd); 270 return ERR_PTR(-EFAULT); 271 } 272 } 273 mutex_lock(&rhp->rdev.stats.lock); 274 rhp->rdev.stats.pd.cur++; 275 if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max) 276 rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur; 277 mutex_unlock(&rhp->rdev.stats.lock); 278 279 CTR6(KTR_IW_CXGBE, 280 "%s: ibdev %p, context %p, data %p, pddid 0x%x, pd %p", __func__, 281 ibdev, context, udata, pdid, php); 282 return (&php->ibpd); 283 } 284 285 static int 286 c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey) 287 { 288 289 CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, pkey %p", __func__, 290 ibdev, port, index, pkey); 291 292 *pkey = 0; 293 return (0); 294 } 295 296 static int 297 c4iw_query_gid(struct ib_device *ibdev, u8 port, int index, union ib_gid *gid) 298 { 299 struct c4iw_dev *dev; 300 struct port_info *pi; 301 struct adapter *sc; 302 303 CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, gid %p", __func__, 304 ibdev, port, index, gid); 305 306 memset(&gid->raw[0], 0, sizeof(gid->raw)); 307 dev = to_c4iw_dev(ibdev); 308 sc = dev->rdev.adap; 309 if (port == 0 || port > sc->params.nports) 310 return (-EINVAL); 311 pi = sc->port[port - 1]; 312 memcpy(&gid->raw[0], pi->vi[0].hw_addr, ETHER_ADDR_LEN); 313 return (0); 314 } 315 316 static int 317 c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props, 318 struct ib_udata *uhw) 319 { 320 struct c4iw_dev *dev = to_c4iw_dev(ibdev); 321 struct adapter *sc = dev->rdev.adap; 322 323 CTR3(KTR_IW_CXGBE, "%s ibdev %p, props %p", __func__, ibdev, props); 324 325 if (uhw->inlen || uhw->outlen) 326 return -EINVAL; 327 328 memset(props, 0, sizeof *props); 329 memcpy(&props->sys_image_guid, sc->port[0]->vi[0].hw_addr, 330 ETHER_ADDR_LEN); 331 props->hw_ver = sc->params.chipid; 332 props->fw_ver = sc->params.fw_vers; 333 props->device_cap_flags = dev->device_cap_flags; 334 props->page_size_cap = T4_PAGESIZE_MASK; 335 props->vendor_id = pci_get_vendor(sc->dev); 336 props->vendor_part_id = pci_get_device(sc->dev); 337 props->max_mr_size = T4_MAX_MR_SIZE; 338 props->max_qp = sc->vres.qp.size / 2; 339 props->max_qp_wr = dev->rdev.hw_queue.t4_max_qp_depth; 340 props->max_sge = T4_MAX_RECV_SGE; 341 props->max_sge_rd = 1; 342 props->max_res_rd_atom = sc->params.max_ird_adapter; 343 props->max_qp_rd_atom = min(sc->params.max_ordird_qp, 344 c4iw_max_read_depth); 345 props->max_qp_init_rd_atom = props->max_qp_rd_atom; 346 props->max_cq = sc->vres.qp.size; 347 props->max_cqe = dev->rdev.hw_queue.t4_max_cq_depth; 348 props->max_mr = c4iw_num_stags(&dev->rdev); 349 props->max_pd = T4_MAX_NUM_PD; 350 props->local_ca_ack_delay = 0; 351 props->max_fast_reg_page_list_len = 352 t4_max_fr_depth(sc->params.ulptx_memwrite_dsgl && use_dsgl); 353 354 return (0); 355 } 356 357 /* 358 * Returns -errno on failure. 359 */ 360 static int 361 c4iw_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props) 362 { 363 struct c4iw_dev *dev; 364 struct adapter *sc; 365 struct port_info *pi; 366 struct ifnet *ifp; 367 368 CTR4(KTR_IW_CXGBE, "%s ibdev %p, port %d, props %p", __func__, ibdev, 369 port, props); 370 371 dev = to_c4iw_dev(ibdev); 372 sc = dev->rdev.adap; 373 if (port > sc->params.nports) 374 return (-EINVAL); 375 pi = sc->port[port - 1]; 376 ifp = pi->vi[0].ifp; 377 378 memset(props, 0, sizeof(struct ib_port_attr)); 379 props->max_mtu = IB_MTU_4096; 380 if (ifp->if_mtu >= 4096) 381 props->active_mtu = IB_MTU_4096; 382 else if (ifp->if_mtu >= 2048) 383 props->active_mtu = IB_MTU_2048; 384 else if (ifp->if_mtu >= 1024) 385 props->active_mtu = IB_MTU_1024; 386 else if (ifp->if_mtu >= 512) 387 props->active_mtu = IB_MTU_512; 388 else 389 props->active_mtu = IB_MTU_256; 390 props->state = pi->link_cfg.link_ok ? IB_PORT_ACTIVE : IB_PORT_DOWN; 391 props->port_cap_flags = 392 IB_PORT_CM_SUP | 393 IB_PORT_SNMP_TUNNEL_SUP | 394 IB_PORT_REINIT_SUP | 395 IB_PORT_DEVICE_MGMT_SUP | 396 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP; 397 props->gid_tbl_len = 1; 398 props->pkey_tbl_len = 1; 399 props->active_width = 2; 400 props->active_speed = 2; 401 props->max_msg_sz = -1; 402 403 return 0; 404 } 405 406 static int c4iw_port_immutable(struct ib_device *ibdev, u8 port_num, 407 struct ib_port_immutable *immutable) 408 { 409 struct ib_port_attr attr; 410 int err; 411 412 immutable->core_cap_flags = RDMA_CORE_PORT_IWARP; 413 414 err = ib_query_port(ibdev, port_num, &attr); 415 if (err) 416 return err; 417 418 immutable->pkey_tbl_len = attr.pkey_tbl_len; 419 immutable->gid_tbl_len = attr.gid_tbl_len; 420 421 return 0; 422 } 423 424 /* 425 * Returns -errno on error. 426 */ 427 int 428 c4iw_register_device(struct c4iw_dev *dev) 429 { 430 struct adapter *sc = dev->rdev.adap; 431 struct ib_device *ibdev = &dev->ibdev; 432 struct iw_cm_verbs *iwcm; 433 int ret; 434 435 CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev, sc); 436 BUG_ON(!sc->port[0]); 437 strlcpy(ibdev->name, device_get_nameunit(sc->dev), sizeof(ibdev->name)); 438 memset(&ibdev->node_guid, 0, sizeof(ibdev->node_guid)); 439 memcpy(&ibdev->node_guid, sc->port[0]->vi[0].hw_addr, ETHER_ADDR_LEN); 440 ibdev->owner = THIS_MODULE; 441 dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW; 442 if (fastreg_support) 443 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS; 444 ibdev->local_dma_lkey = 0; 445 ibdev->uverbs_cmd_mask = 446 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) | 447 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) | 448 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) | 449 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) | 450 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) | 451 (1ull << IB_USER_VERBS_CMD_REG_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_DESTROY_CQ) | 456 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_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_POLL_CQ) | 461 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) | 462 (1ull << IB_USER_VERBS_CMD_POST_SEND) | 463 (1ull << IB_USER_VERBS_CMD_POST_RECV); 464 ibdev->node_type = RDMA_NODE_RNIC; 465 strlcpy(ibdev->node_desc, C4IW_NODE_DESC, sizeof(ibdev->node_desc)); 466 ibdev->phys_port_cnt = sc->params.nports; 467 ibdev->num_comp_vectors = 1; 468 ibdev->dma_device = NULL; 469 ibdev->query_device = c4iw_query_device; 470 ibdev->query_port = c4iw_query_port; 471 ibdev->modify_port = c4iw_modify_port; 472 ibdev->query_pkey = c4iw_query_pkey; 473 ibdev->query_gid = c4iw_query_gid; 474 ibdev->alloc_ucontext = c4iw_alloc_ucontext; 475 ibdev->dealloc_ucontext = c4iw_dealloc_ucontext; 476 ibdev->mmap = c4iw_mmap; 477 ibdev->alloc_pd = c4iw_allocate_pd; 478 ibdev->dealloc_pd = c4iw_deallocate_pd; 479 ibdev->create_ah = c4iw_ah_create; 480 ibdev->destroy_ah = c4iw_ah_destroy; 481 ibdev->create_qp = c4iw_create_qp; 482 ibdev->modify_qp = c4iw_ib_modify_qp; 483 ibdev->query_qp = c4iw_ib_query_qp; 484 ibdev->destroy_qp = c4iw_destroy_qp; 485 ibdev->create_cq = c4iw_create_cq; 486 ibdev->destroy_cq = c4iw_destroy_cq; 487 ibdev->resize_cq = c4iw_resize_cq; 488 ibdev->poll_cq = c4iw_poll_cq; 489 ibdev->get_dma_mr = c4iw_get_dma_mr; 490 ibdev->reg_user_mr = c4iw_reg_user_mr; 491 ibdev->dereg_mr = c4iw_dereg_mr; 492 ibdev->alloc_mw = c4iw_alloc_mw; 493 ibdev->dealloc_mw = c4iw_dealloc_mw; 494 ibdev->alloc_mr = c4iw_alloc_mr; 495 ibdev->map_mr_sg = c4iw_map_mr_sg; 496 ibdev->attach_mcast = c4iw_multicast_attach; 497 ibdev->detach_mcast = c4iw_multicast_detach; 498 ibdev->process_mad = c4iw_process_mad; 499 ibdev->req_notify_cq = c4iw_arm_cq; 500 ibdev->post_send = c4iw_post_send; 501 ibdev->post_recv = c4iw_post_receive; 502 ibdev->uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION; 503 ibdev->get_port_immutable = c4iw_port_immutable; 504 505 iwcm = kmalloc(sizeof(*iwcm), GFP_KERNEL); 506 if (iwcm == NULL) 507 return (-ENOMEM); 508 509 iwcm->connect = c4iw_connect; 510 iwcm->accept = c4iw_accept_cr; 511 iwcm->reject = c4iw_reject_cr; 512 iwcm->create_listen = c4iw_create_listen; 513 iwcm->destroy_listen = c4iw_destroy_listen; 514 iwcm->add_ref = c4iw_qp_add_ref; 515 iwcm->rem_ref = c4iw_qp_rem_ref; 516 iwcm->get_qp = c4iw_get_qp; 517 ibdev->iwcm = iwcm; 518 519 ret = ib_register_device(&dev->ibdev, NULL); 520 if (ret) 521 kfree(iwcm); 522 523 return (ret); 524 } 525 526 void 527 c4iw_unregister_device(struct c4iw_dev *dev) 528 { 529 530 CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev, 531 dev->rdev.adap); 532 ib_unregister_device(&dev->ibdev); 533 kfree(dev->ibdev.iwcm); 534 return; 535 } 536 #endif 537