1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2009-2013 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 #include "opt_inet.h" 38 39 #include <sys/ktr.h> 40 41 #include <linux/module.h> 42 #include <linux/moduleparam.h> 43 44 #include <rdma/ib_verbs.h> 45 #include <linux/idr.h> 46 47 #ifdef TCP_OFFLOAD 48 #include "iw_cxgbe.h" 49 50 void 51 c4iw_release_dev_ucontext(struct c4iw_rdev *rdev, 52 struct c4iw_dev_ucontext *uctx) 53 { 54 struct list_head *pos, *nxt; 55 struct c4iw_qid_list *entry; 56 57 mutex_lock(&uctx->lock); 58 list_for_each_safe(pos, nxt, &uctx->qpids) { 59 entry = list_entry(pos, struct c4iw_qid_list, entry); 60 list_del_init(&entry->entry); 61 if (!(entry->qid & rdev->qpmask)) { 62 c4iw_put_resource(&rdev->resource.qid_table, 63 entry->qid); 64 mutex_lock(&rdev->stats.lock); 65 rdev->stats.qid.cur -= rdev->qpmask + 1; 66 mutex_unlock(&rdev->stats.lock); 67 } 68 kfree(entry); 69 } 70 71 list_for_each_safe(pos, nxt, &uctx->cqids) { 72 entry = list_entry(pos, struct c4iw_qid_list, entry); 73 list_del_init(&entry->entry); 74 kfree(entry); 75 } 76 mutex_unlock(&uctx->lock); 77 } 78 79 void 80 c4iw_init_dev_ucontext(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx) 81 { 82 83 INIT_LIST_HEAD(&uctx->qpids); 84 INIT_LIST_HEAD(&uctx->cqids); 85 mutex_init(&uctx->lock); 86 } 87 88 static int 89 c4iw_rdev_open(struct c4iw_rdev *rdev) 90 { 91 struct adapter *sc = rdev->adap; 92 struct sge_params *sp = &sc->params.sge; 93 int rc; 94 unsigned short ucq_density = 1 << sp->iq_s_qpp; /* # of user CQs/page */ 95 unsigned short udb_density = 1 << sp->eq_s_qpp; /* # of user DB/page */ 96 97 98 c4iw_init_dev_ucontext(rdev, &rdev->uctx); 99 100 /* 101 * This implementation assumes udb_density == ucq_density! Eventually 102 * we might need to support this but for now fail the open. Also the 103 * cqid and qpid range must match for now. 104 */ 105 if (udb_density != ucq_density) { 106 device_printf(sc->dev, "unsupported udb/ucq densities %u/%u\n", 107 udb_density, ucq_density); 108 rc = -EINVAL; 109 goto err1; 110 } 111 if (sc->vres.qp.start != sc->vres.cq.start || 112 sc->vres.qp.size != sc->vres.cq.size) { 113 device_printf(sc->dev, "%s: unsupported qp and cq id ranges " 114 "qp start %u size %u cq start %u size %u\n", __func__, 115 sc->vres.qp.start, sc->vres.qp.size, sc->vres.cq.start, 116 sc->vres.cq.size); 117 rc = -EINVAL; 118 goto err1; 119 } 120 121 rdev->qpshift = PAGE_SHIFT - sp->eq_s_qpp; 122 rdev->qpmask = udb_density - 1; 123 rdev->cqshift = PAGE_SHIFT - sp->iq_s_qpp; 124 rdev->cqmask = ucq_density - 1; 125 126 if (c4iw_num_stags(rdev) == 0) { 127 rc = -EINVAL; 128 goto err1; 129 } 130 131 rdev->stats.pd.total = T4_MAX_NUM_PD; 132 rdev->stats.stag.total = sc->vres.stag.size; 133 rdev->stats.pbl.total = sc->vres.pbl.size; 134 rdev->stats.rqt.total = sc->vres.rq.size; 135 rdev->stats.qid.total = sc->vres.qp.size; 136 137 rc = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD); 138 if (rc) { 139 device_printf(sc->dev, "error %d initializing resources\n", rc); 140 goto err1; 141 } 142 rc = c4iw_pblpool_create(rdev); 143 if (rc) { 144 device_printf(sc->dev, "error %d initializing pbl pool\n", rc); 145 goto err2; 146 } 147 rc = c4iw_rqtpool_create(rdev); 148 if (rc) { 149 device_printf(sc->dev, "error %d initializing rqt pool\n", rc); 150 goto err3; 151 } 152 rdev->status_page = (struct t4_dev_status_page *) 153 __get_free_page(GFP_KERNEL); 154 if (!rdev->status_page) { 155 rc = -ENOMEM; 156 goto err4; 157 } 158 rdev->status_page->qp_start = sc->vres.qp.start; 159 rdev->status_page->qp_size = sc->vres.qp.size; 160 rdev->status_page->cq_start = sc->vres.cq.start; 161 rdev->status_page->cq_size = sc->vres.cq.size; 162 163 /* T5 and above devices don't need Doorbell recovery logic, 164 * so db_off is always set to '0'. 165 */ 166 rdev->status_page->db_off = 0; 167 168 rdev->status_page->wc_supported = rdev->adap->iwt.wc_en; 169 170 rdev->free_workq = create_singlethread_workqueue("iw_cxgb4_free"); 171 if (!rdev->free_workq) { 172 rc = -ENOMEM; 173 goto err5; 174 } 175 return (0); 176 err5: 177 free_page((unsigned long)rdev->status_page); 178 err4: 179 c4iw_rqtpool_destroy(rdev); 180 err3: 181 c4iw_pblpool_destroy(rdev); 182 err2: 183 c4iw_destroy_resource(&rdev->resource); 184 err1: 185 return (rc); 186 } 187 188 static void c4iw_rdev_close(struct c4iw_rdev *rdev) 189 { 190 free_page((unsigned long)rdev->status_page); 191 c4iw_pblpool_destroy(rdev); 192 c4iw_rqtpool_destroy(rdev); 193 c4iw_destroy_resource(&rdev->resource); 194 } 195 196 static void 197 c4iw_dealloc(struct c4iw_dev *iwsc) 198 { 199 200 c4iw_rdev_close(&iwsc->rdev); 201 idr_destroy(&iwsc->cqidr); 202 idr_destroy(&iwsc->qpidr); 203 idr_destroy(&iwsc->mmidr); 204 ib_dealloc_device(&iwsc->ibdev); 205 } 206 207 static struct c4iw_dev * 208 c4iw_alloc(struct adapter *sc) 209 { 210 struct c4iw_dev *iwsc; 211 int rc; 212 213 iwsc = (struct c4iw_dev *)ib_alloc_device(sizeof(*iwsc)); 214 if (iwsc == NULL) { 215 device_printf(sc->dev, "Cannot allocate ib device.\n"); 216 return (ERR_PTR(-ENOMEM)); 217 } 218 iwsc->rdev.adap = sc; 219 220 /* init various hw-queue params based on lld info */ 221 iwsc->rdev.hw_queue.t4_eq_status_entries = 222 sc->params.sge.spg_len / EQ_ESIZE; 223 iwsc->rdev.hw_queue.t4_max_eq_size = 65520; 224 iwsc->rdev.hw_queue.t4_max_iq_size = 65520; 225 iwsc->rdev.hw_queue.t4_max_rq_size = 8192 - 226 iwsc->rdev.hw_queue.t4_eq_status_entries - 1; 227 iwsc->rdev.hw_queue.t4_max_sq_size = 228 iwsc->rdev.hw_queue.t4_max_eq_size - 229 iwsc->rdev.hw_queue.t4_eq_status_entries - 1; 230 iwsc->rdev.hw_queue.t4_max_qp_depth = 231 iwsc->rdev.hw_queue.t4_max_rq_size; 232 iwsc->rdev.hw_queue.t4_max_cq_depth = 233 iwsc->rdev.hw_queue.t4_max_iq_size - 2; 234 iwsc->rdev.hw_queue.t4_stat_len = iwsc->rdev.adap->params.sge.spg_len; 235 236 /* As T5 and above devices support BAR2 kernel doorbells & WC, we map 237 * all of BAR2, for both User and Kernel Doorbells-GTS. 238 */ 239 iwsc->rdev.bar2_kva = (void __iomem *)((u64)iwsc->rdev.adap->udbs_base); 240 iwsc->rdev.bar2_pa = vtophys(iwsc->rdev.adap->udbs_base); 241 iwsc->rdev.bar2_len = rman_get_size(iwsc->rdev.adap->udbs_res); 242 243 rc = c4iw_rdev_open(&iwsc->rdev); 244 if (rc != 0) { 245 device_printf(sc->dev, "Unable to open CXIO rdev (%d)\n", rc); 246 ib_dealloc_device(&iwsc->ibdev); 247 return (ERR_PTR(rc)); 248 } 249 250 idr_init(&iwsc->cqidr); 251 idr_init(&iwsc->qpidr); 252 idr_init(&iwsc->mmidr); 253 spin_lock_init(&iwsc->lock); 254 mutex_init(&iwsc->rdev.stats.lock); 255 iwsc->avail_ird = iwsc->rdev.adap->params.max_ird_adapter; 256 257 return (iwsc); 258 } 259 260 static int c4iw_mod_load(void); 261 static int c4iw_mod_unload(void); 262 static int c4iw_activate(struct adapter *); 263 static int c4iw_deactivate(struct adapter *); 264 static void c4iw_async_event(struct adapter *); 265 266 static struct uld_info c4iw_uld_info = { 267 .uld_id = ULD_IWARP, 268 .activate = c4iw_activate, 269 .deactivate = c4iw_deactivate, 270 .async_event = c4iw_async_event, 271 }; 272 273 static int 274 c4iw_activate(struct adapter *sc) 275 { 276 struct c4iw_dev *iwsc; 277 int rc; 278 279 ASSERT_SYNCHRONIZED_OP(sc); 280 281 if (is_t4(sc)) { 282 device_printf(sc->dev, "No iWARP support for T4 devices, " 283 "please install T5 or above devices.\n"); 284 return (ENOSYS); 285 } 286 287 if (uld_active(sc, ULD_IWARP)) { 288 KASSERT(0, ("%s: RDMA already eanbled on sc %p", __func__, sc)); 289 return (0); 290 } 291 292 if (sc->rdmacaps == 0) { 293 device_printf(sc->dev, 294 "RDMA not supported or RDMA cap is not enabled.\n"); 295 return (ENOSYS); 296 } 297 298 iwsc = c4iw_alloc(sc); 299 if (IS_ERR(iwsc)) { 300 rc = -PTR_ERR(iwsc); 301 device_printf(sc->dev, "initialization failed: %d\n", rc); 302 return (rc); 303 } 304 305 sc->iwarp_softc = iwsc; 306 307 rc = -c4iw_register_device(iwsc); 308 if (rc) { 309 device_printf(sc->dev, "RDMA registration failed: %d\n", rc); 310 c4iw_dealloc(iwsc); 311 sc->iwarp_softc = NULL; 312 } 313 314 return (rc); 315 } 316 317 static int 318 c4iw_deactivate(struct adapter *sc) 319 { 320 struct c4iw_dev *iwsc = sc->iwarp_softc; 321 322 ASSERT_SYNCHRONIZED_OP(sc); 323 324 c4iw_unregister_device(iwsc); 325 c4iw_dealloc(iwsc); 326 sc->iwarp_softc = NULL; 327 328 return (0); 329 } 330 331 static void 332 c4iw_async_event(struct adapter *sc) 333 { 334 struct c4iw_dev *iwsc = sc->iwarp_softc; 335 336 if (iwsc) { 337 struct ib_event event = {0}; 338 339 device_printf(sc->dev, 340 "iWARP driver received FATAL ERROR event.\n"); 341 iwsc->rdev.flags |= T4_FATAL_ERROR; 342 event.event = IB_EVENT_DEVICE_FATAL; 343 event.device = &iwsc->ibdev; 344 ib_dispatch_event(&event); 345 } 346 } 347 348 static void 349 c4iw_activate_all(struct adapter *sc, void *arg __unused) 350 { 351 352 if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwact") != 0) 353 return; 354 355 /* Activate iWARP if any port on this adapter has IFCAP_TOE enabled. */ 356 if (sc->offload_map && !uld_active(sc, ULD_IWARP)) 357 (void) t4_activate_uld(sc, ULD_IWARP); 358 359 end_synchronized_op(sc, 0); 360 } 361 362 static void 363 c4iw_deactivate_all(struct adapter *sc, void *arg __unused) 364 { 365 366 if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwdea") != 0) 367 return; 368 369 if (uld_active(sc, ULD_IWARP)) 370 (void) t4_deactivate_uld(sc, ULD_IWARP); 371 372 end_synchronized_op(sc, 0); 373 } 374 375 static int 376 c4iw_mod_load(void) 377 { 378 int rc; 379 380 rc = -c4iw_cm_init(); 381 if (rc != 0) 382 return (rc); 383 384 rc = t4_register_uld(&c4iw_uld_info); 385 if (rc != 0) { 386 c4iw_cm_term(); 387 return (rc); 388 } 389 390 t4_iterate(c4iw_activate_all, NULL); 391 392 return (rc); 393 } 394 395 static int 396 c4iw_mod_unload(void) 397 { 398 399 t4_iterate(c4iw_deactivate_all, NULL); 400 401 c4iw_cm_term(); 402 403 if (t4_unregister_uld(&c4iw_uld_info) == EBUSY) 404 return (EBUSY); 405 406 return (0); 407 } 408 409 #endif 410 411 /* 412 * t4_tom won't load on kernels without TCP_OFFLOAD and this module's dependency 413 * on t4_tom ensures that it won't either. So we don't directly check for 414 * TCP_OFFLOAD here. 415 */ 416 static int 417 c4iw_modevent(module_t mod, int cmd, void *arg) 418 { 419 int rc = 0; 420 421 #ifdef TCP_OFFLOAD 422 switch (cmd) { 423 case MOD_LOAD: 424 rc = c4iw_mod_load(); 425 if (rc == 0) 426 printf("iw_cxgbe: Chelsio T5/T6 RDMA driver loaded.\n"); 427 break; 428 429 case MOD_UNLOAD: 430 rc = c4iw_mod_unload(); 431 break; 432 433 default: 434 rc = EINVAL; 435 } 436 #else 437 printf("t4_tom: compiled without TCP_OFFLOAD support.\n"); 438 rc = EOPNOTSUPP; 439 #endif 440 return (rc); 441 } 442 443 static moduledata_t c4iw_mod_data = { 444 "iw_cxgbe", 445 c4iw_modevent, 446 0 447 }; 448 449 MODULE_VERSION(iw_cxgbe, 1); 450 MODULE_DEPEND(iw_cxgbe, t4nex, 1, 1, 1); 451 MODULE_DEPEND(iw_cxgbe, t4_tom, 1, 1, 1); 452 MODULE_DEPEND(iw_cxgbe, ibcore, 1, 1, 1); 453 MODULE_DEPEND(iw_cxgbe, linuxkpi, 1, 1, 1); 454 DECLARE_MODULE(iw_cxgbe, c4iw_mod_data, SI_SUB_EXEC, SI_ORDER_ANY); 455