1 /* 2 * Copyright (c) 2009-2013 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_inet.h" 36 37 #include <sys/ktr.h> 38 39 #include <linux/module.h> 40 #include <linux/moduleparam.h> 41 42 #include <rdma/ib_verbs.h> 43 #include <linux/idr.h> 44 45 #ifdef TCP_OFFLOAD 46 #include "iw_cxgbe.h" 47 48 int spg_creds = 2; /* Default status page size is 2 credits = 128B */ 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->qpids) { 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 int rc; 93 94 c4iw_init_dev_ucontext(rdev, &rdev->uctx); 95 96 /* Save the status page size set by if_cxgbe */ 97 spg_creds = (t4_read_reg(sc, A_SGE_CONTROL) & F_EGRSTATUSPAGESIZE) ? 98 2 : 1; 99 100 /* XXX: we can probably make this work */ 101 if (sc->sge.eq_s_qpp > PAGE_SHIFT || sc->sge.iq_s_qpp > PAGE_SHIFT) { 102 device_printf(sc->dev, 103 "doorbell density too high (eq %d, iq %d, pg %d).\n", 104 sc->sge.eq_s_qpp, sc->sge.eq_s_qpp, PAGE_SHIFT); 105 rc = -EINVAL; 106 goto err1; 107 } 108 109 rdev->qpshift = PAGE_SHIFT - sc->sge.eq_s_qpp; 110 rdev->qpmask = (1 << sc->sge.eq_s_qpp) - 1; 111 rdev->cqshift = PAGE_SHIFT - sc->sge.iq_s_qpp; 112 rdev->cqmask = (1 << sc->sge.iq_s_qpp) - 1; 113 114 if (c4iw_num_stags(rdev) == 0) { 115 rc = -EINVAL; 116 goto err1; 117 } 118 119 rdev->stats.pd.total = T4_MAX_NUM_PD; 120 rdev->stats.stag.total = sc->vres.stag.size; 121 rdev->stats.pbl.total = sc->vres.pbl.size; 122 rdev->stats.rqt.total = sc->vres.rq.size; 123 rdev->stats.qid.total = sc->vres.qp.size; 124 125 rc = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD); 126 if (rc) { 127 device_printf(sc->dev, "error %d initializing resources\n", rc); 128 goto err1; 129 } 130 rc = c4iw_pblpool_create(rdev); 131 if (rc) { 132 device_printf(sc->dev, "error %d initializing pbl pool\n", rc); 133 goto err2; 134 } 135 rc = c4iw_rqtpool_create(rdev); 136 if (rc) { 137 device_printf(sc->dev, "error %d initializing rqt pool\n", rc); 138 goto err3; 139 } 140 141 return (0); 142 err3: 143 c4iw_pblpool_destroy(rdev); 144 err2: 145 c4iw_destroy_resource(&rdev->resource); 146 err1: 147 return (rc); 148 } 149 150 static void c4iw_rdev_close(struct c4iw_rdev *rdev) 151 { 152 c4iw_pblpool_destroy(rdev); 153 c4iw_rqtpool_destroy(rdev); 154 c4iw_destroy_resource(&rdev->resource); 155 } 156 157 static void 158 c4iw_dealloc(struct c4iw_dev *iwsc) 159 { 160 161 c4iw_rdev_close(&iwsc->rdev); 162 idr_destroy(&iwsc->cqidr); 163 idr_destroy(&iwsc->qpidr); 164 idr_destroy(&iwsc->mmidr); 165 ib_dealloc_device(&iwsc->ibdev); 166 } 167 168 static struct c4iw_dev * 169 c4iw_alloc(struct adapter *sc) 170 { 171 struct c4iw_dev *iwsc; 172 int rc; 173 174 iwsc = (struct c4iw_dev *)ib_alloc_device(sizeof(*iwsc)); 175 if (iwsc == NULL) { 176 device_printf(sc->dev, "Cannot allocate ib device.\n"); 177 return (ERR_PTR(-ENOMEM)); 178 } 179 iwsc->rdev.adap = sc; 180 181 rc = c4iw_rdev_open(&iwsc->rdev); 182 if (rc != 0) { 183 device_printf(sc->dev, "Unable to open CXIO rdev (%d)\n", rc); 184 ib_dealloc_device(&iwsc->ibdev); 185 return (ERR_PTR(rc)); 186 } 187 188 idr_init(&iwsc->cqidr); 189 idr_init(&iwsc->qpidr); 190 idr_init(&iwsc->mmidr); 191 spin_lock_init(&iwsc->lock); 192 mutex_init(&iwsc->rdev.stats.lock); 193 194 return (iwsc); 195 } 196 197 static int c4iw_mod_load(void); 198 static int c4iw_mod_unload(void); 199 static int c4iw_activate(struct adapter *); 200 static int c4iw_deactivate(struct adapter *); 201 202 static struct uld_info c4iw_uld_info = { 203 .uld_id = ULD_IWARP, 204 .activate = c4iw_activate, 205 .deactivate = c4iw_deactivate, 206 }; 207 208 static int 209 c4iw_activate(struct adapter *sc) 210 { 211 struct c4iw_dev *iwsc; 212 int rc; 213 214 ASSERT_SYNCHRONIZED_OP(sc); 215 216 if (uld_active(sc, ULD_IWARP)) { 217 KASSERT(0, ("%s: RDMA already eanbled on sc %p", __func__, sc)); 218 return (0); 219 } 220 221 if (sc->rdmacaps == 0) { 222 device_printf(sc->dev, 223 "RDMA not supported or RDMA cap is not enabled.\n"); 224 return (ENOSYS); 225 } 226 227 iwsc = c4iw_alloc(sc); 228 if (IS_ERR(iwsc)) { 229 rc = -PTR_ERR(iwsc); 230 device_printf(sc->dev, "initialization failed: %d\n", rc); 231 return (rc); 232 } 233 234 sc->iwarp_softc = iwsc; 235 c4iw_cm_init_cpl(sc); 236 237 rc = -c4iw_register_device(iwsc); 238 if (rc) { 239 device_printf(sc->dev, "RDMA registration failed: %d\n", rc); 240 c4iw_dealloc(iwsc); 241 sc->iwarp_softc = NULL; 242 } 243 244 return (rc); 245 } 246 247 static int 248 c4iw_deactivate(struct adapter *sc) 249 { 250 struct c4iw_dev *iwsc = sc->iwarp_softc; 251 252 ASSERT_SYNCHRONIZED_OP(sc); 253 254 c4iw_unregister_device(iwsc); 255 c4iw_dealloc(iwsc); 256 sc->iwarp_softc = NULL; 257 258 return (0); 259 } 260 261 static void 262 c4iw_activate_all(struct adapter *sc, void *arg __unused) 263 { 264 265 if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwact") != 0) 266 return; 267 268 /* Activate iWARP if any port on this adapter has IFCAP_TOE enabled. */ 269 if (sc->offload_map && !uld_active(sc, ULD_IWARP)) 270 (void) t4_activate_uld(sc, ULD_IWARP); 271 272 end_synchronized_op(sc, 0); 273 } 274 275 static void 276 c4iw_deactivate_all(struct adapter *sc, void *arg __unused) 277 { 278 279 if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4iwdea") != 0) 280 return; 281 282 if (uld_active(sc, ULD_IWARP)) 283 (void) t4_deactivate_uld(sc, ULD_IWARP); 284 285 end_synchronized_op(sc, 0); 286 } 287 288 static int 289 c4iw_mod_load(void) 290 { 291 int rc; 292 293 rc = -c4iw_cm_init(); 294 if (rc != 0) 295 return (rc); 296 297 rc = t4_register_uld(&c4iw_uld_info); 298 if (rc != 0) { 299 c4iw_cm_term(); 300 return (rc); 301 } 302 303 t4_iterate(c4iw_activate_all, NULL); 304 305 return (rc); 306 } 307 308 static int 309 c4iw_mod_unload(void) 310 { 311 312 t4_iterate(c4iw_deactivate_all, NULL); 313 314 c4iw_cm_term(); 315 316 if (t4_unregister_uld(&c4iw_uld_info) == EBUSY) 317 return (EBUSY); 318 319 return (0); 320 } 321 322 #endif 323 324 /* 325 * t4_tom won't load on kernels without TCP_OFFLOAD and this module's dependency 326 * on t4_tom ensures that it won't either. So we don't directly check for 327 * TCP_OFFLOAD here. 328 */ 329 static int 330 c4iw_modevent(module_t mod, int cmd, void *arg) 331 { 332 int rc = 0; 333 334 #ifdef TCP_OFFLOAD 335 switch (cmd) { 336 case MOD_LOAD: 337 rc = c4iw_mod_load(); 338 if (rc == 0) 339 printf("iw_cxgbe: Chelsio T4/T5 RDMA driver loaded.\n"); 340 break; 341 342 case MOD_UNLOAD: 343 rc = c4iw_mod_unload(); 344 break; 345 346 default: 347 rc = EINVAL; 348 } 349 #else 350 printf("t4_tom: compiled without TCP_OFFLOAD support.\n"); 351 rc = EOPNOTSUPP; 352 #endif 353 return (rc); 354 } 355 356 static moduledata_t c4iw_mod_data = { 357 "iw_cxgbe", 358 c4iw_modevent, 359 0 360 }; 361 362 MODULE_VERSION(iw_cxgbe, 1); 363 MODULE_DEPEND(iw_cxgbe, t4nex, 1, 1, 1); 364 MODULE_DEPEND(iw_cxgbe, t4_tom, 1, 1, 1); 365 MODULE_DEPEND(iw_cxgbe, ibcore, 1, 1, 1); 366 MODULE_DEPEND(iw_cxgbe, linuxkpi, 1, 1, 1); 367 DECLARE_MODULE(iw_cxgbe, c4iw_mod_data, SI_SUB_EXEC, SI_ORDER_ANY); 368