1 /* QLogic qedr NIC Driver 2 * Copyright (c) 2015-2016 QLogic Corporation 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 <linux/module.h> 33 #include <rdma/ib_verbs.h> 34 #include <rdma/ib_addr.h> 35 #include <rdma/ib_user_verbs.h> 36 #include <rdma/iw_cm.h> 37 #include <rdma/ib_mad.h> 38 #include <linux/netdevice.h> 39 #include <linux/iommu.h> 40 #include <linux/pci.h> 41 #include <net/addrconf.h> 42 43 #include <linux/qed/qed_chain.h> 44 #include <linux/qed/qed_if.h> 45 #include "qedr.h" 46 #include "verbs.h" 47 #include <rdma/qedr-abi.h> 48 #include "qedr_iw_cm.h" 49 50 MODULE_DESCRIPTION("QLogic 40G/100G ROCE Driver"); 51 MODULE_AUTHOR("QLogic Corporation"); 52 MODULE_LICENSE("Dual BSD/GPL"); 53 54 #define QEDR_WQ_MULTIPLIER_DFT (3) 55 qedr_ib_dispatch_event(struct qedr_dev * dev,u32 port_num,enum ib_event_type type)56 static void qedr_ib_dispatch_event(struct qedr_dev *dev, u32 port_num, 57 enum ib_event_type type) 58 { 59 struct ib_event ibev; 60 61 ibev.device = &dev->ibdev; 62 ibev.element.port_num = port_num; 63 ibev.event = type; 64 65 ib_dispatch_event(&ibev); 66 } 67 qedr_link_layer(struct ib_device * device,u32 port_num)68 static enum rdma_link_layer qedr_link_layer(struct ib_device *device, 69 u32 port_num) 70 { 71 return IB_LINK_LAYER_ETHERNET; 72 } 73 qedr_get_dev_fw_str(struct ib_device * ibdev,char * str)74 static void qedr_get_dev_fw_str(struct ib_device *ibdev, char *str) 75 { 76 struct qedr_dev *qedr = get_qedr_dev(ibdev); 77 u32 fw_ver = (u32)qedr->attr.fw_ver; 78 79 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d.%d", 80 (fw_ver >> 24) & 0xFF, (fw_ver >> 16) & 0xFF, 81 (fw_ver >> 8) & 0xFF, fw_ver & 0xFF); 82 } 83 qedr_roce_port_immutable(struct ib_device * ibdev,u32 port_num,struct ib_port_immutable * immutable)84 static int qedr_roce_port_immutable(struct ib_device *ibdev, u32 port_num, 85 struct ib_port_immutable *immutable) 86 { 87 struct ib_port_attr attr; 88 int err; 89 90 err = qedr_query_port(ibdev, port_num, &attr); 91 if (err) 92 return err; 93 94 immutable->pkey_tbl_len = attr.pkey_tbl_len; 95 immutable->gid_tbl_len = attr.gid_tbl_len; 96 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE | 97 RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP; 98 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 99 100 return 0; 101 } 102 qedr_iw_port_immutable(struct ib_device * ibdev,u32 port_num,struct ib_port_immutable * immutable)103 static int qedr_iw_port_immutable(struct ib_device *ibdev, u32 port_num, 104 struct ib_port_immutable *immutable) 105 { 106 struct ib_port_attr attr; 107 int err; 108 109 err = qedr_query_port(ibdev, port_num, &attr); 110 if (err) 111 return err; 112 113 immutable->gid_tbl_len = 1; 114 immutable->core_cap_flags = RDMA_CORE_PORT_IWARP; 115 immutable->max_mad_size = 0; 116 117 return 0; 118 } 119 120 /* QEDR sysfs interface */ hw_rev_show(struct device * device,struct device_attribute * attr,char * buf)121 static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr, 122 char *buf) 123 { 124 struct qedr_dev *dev = 125 rdma_device_to_drv_device(device, struct qedr_dev, ibdev); 126 127 return sysfs_emit(buf, "0x%x\n", dev->attr.hw_ver); 128 } 129 static DEVICE_ATTR_RO(hw_rev); 130 hca_type_show(struct device * device,struct device_attribute * attr,char * buf)131 static ssize_t hca_type_show(struct device *device, 132 struct device_attribute *attr, char *buf) 133 { 134 struct qedr_dev *dev = 135 rdma_device_to_drv_device(device, struct qedr_dev, ibdev); 136 137 return sysfs_emit(buf, "FastLinQ QL%x %s\n", dev->pdev->device, 138 rdma_protocol_iwarp(&dev->ibdev, 1) ? "iWARP" : 139 "RoCE"); 140 } 141 static DEVICE_ATTR_RO(hca_type); 142 143 static struct attribute *qedr_attributes[] = { 144 &dev_attr_hw_rev.attr, 145 &dev_attr_hca_type.attr, 146 NULL 147 }; 148 149 static const struct attribute_group qedr_attr_group = { 150 .attrs = qedr_attributes, 151 }; 152 153 static const struct ib_device_ops qedr_iw_dev_ops = { 154 .get_port_immutable = qedr_iw_port_immutable, 155 .iw_accept = qedr_iw_accept, 156 .iw_add_ref = qedr_iw_qp_add_ref, 157 .iw_connect = qedr_iw_connect, 158 .iw_create_listen = qedr_iw_create_listen, 159 .iw_destroy_listen = qedr_iw_destroy_listen, 160 .iw_get_qp = qedr_iw_get_qp, 161 .iw_reject = qedr_iw_reject, 162 .iw_rem_ref = qedr_iw_qp_rem_ref, 163 .query_gid = qedr_iw_query_gid, 164 }; 165 qedr_iw_register_device(struct qedr_dev * dev)166 static int qedr_iw_register_device(struct qedr_dev *dev) 167 { 168 dev->ibdev.node_type = RDMA_NODE_RNIC; 169 170 ib_set_device_ops(&dev->ibdev, &qedr_iw_dev_ops); 171 172 memcpy(dev->ibdev.iw_ifname, 173 dev->ndev->name, sizeof(dev->ibdev.iw_ifname)); 174 175 return 0; 176 } 177 178 static const struct ib_device_ops qedr_roce_dev_ops = { 179 .alloc_xrcd = qedr_alloc_xrcd, 180 .dealloc_xrcd = qedr_dealloc_xrcd, 181 .get_port_immutable = qedr_roce_port_immutable, 182 .query_pkey = qedr_query_pkey, 183 }; 184 qedr_roce_register_device(struct qedr_dev * dev)185 static void qedr_roce_register_device(struct qedr_dev *dev) 186 { 187 dev->ibdev.node_type = RDMA_NODE_IB_CA; 188 189 ib_set_device_ops(&dev->ibdev, &qedr_roce_dev_ops); 190 } 191 192 static const struct ib_device_ops qedr_dev_ops = { 193 .owner = THIS_MODULE, 194 .driver_id = RDMA_DRIVER_QEDR, 195 .uverbs_abi_ver = QEDR_ABI_VERSION, 196 197 .alloc_mr = qedr_alloc_mr, 198 .alloc_pd = qedr_alloc_pd, 199 .alloc_ucontext = qedr_alloc_ucontext, 200 .create_ah = qedr_create_ah, 201 .create_cq = qedr_create_cq, 202 .create_qp = qedr_create_qp, 203 .create_srq = qedr_create_srq, 204 .dealloc_pd = qedr_dealloc_pd, 205 .dealloc_ucontext = qedr_dealloc_ucontext, 206 .dereg_mr = qedr_dereg_mr, 207 .destroy_ah = qedr_destroy_ah, 208 .destroy_cq = qedr_destroy_cq, 209 .destroy_qp = qedr_destroy_qp, 210 .destroy_srq = qedr_destroy_srq, 211 .device_group = &qedr_attr_group, 212 .get_dev_fw_str = qedr_get_dev_fw_str, 213 .get_dma_mr = qedr_get_dma_mr, 214 .get_link_layer = qedr_link_layer, 215 .map_mr_sg = qedr_map_mr_sg, 216 .mmap = qedr_mmap, 217 .mmap_free = qedr_mmap_free, 218 .modify_qp = qedr_modify_qp, 219 .modify_srq = qedr_modify_srq, 220 .poll_cq = qedr_poll_cq, 221 .post_recv = qedr_post_recv, 222 .post_send = qedr_post_send, 223 .post_srq_recv = qedr_post_srq_recv, 224 .process_mad = qedr_process_mad, 225 .query_device = qedr_query_device, 226 .query_port = qedr_query_port, 227 .query_qp = qedr_query_qp, 228 .query_srq = qedr_query_srq, 229 .reg_user_mr = qedr_reg_user_mr, 230 .req_notify_cq = qedr_arm_cq, 231 232 INIT_RDMA_OBJ_SIZE(ib_ah, qedr_ah, ibah), 233 INIT_RDMA_OBJ_SIZE(ib_cq, qedr_cq, ibcq), 234 INIT_RDMA_OBJ_SIZE(ib_pd, qedr_pd, ibpd), 235 INIT_RDMA_OBJ_SIZE(ib_qp, qedr_qp, ibqp), 236 INIT_RDMA_OBJ_SIZE(ib_srq, qedr_srq, ibsrq), 237 INIT_RDMA_OBJ_SIZE(ib_xrcd, qedr_xrcd, ibxrcd), 238 INIT_RDMA_OBJ_SIZE(ib_ucontext, qedr_ucontext, ibucontext), 239 }; 240 qedr_register_device(struct qedr_dev * dev)241 static int qedr_register_device(struct qedr_dev *dev) 242 { 243 int rc; 244 245 dev->ibdev.node_guid = dev->attr.node_guid; 246 memcpy(dev->ibdev.node_desc, QEDR_NODE_DESC, sizeof(QEDR_NODE_DESC)); 247 248 if (IS_IWARP(dev)) { 249 rc = qedr_iw_register_device(dev); 250 if (rc) 251 return rc; 252 } else { 253 qedr_roce_register_device(dev); 254 } 255 256 dev->ibdev.phys_port_cnt = 1; 257 dev->ibdev.num_comp_vectors = dev->num_cnq; 258 dev->ibdev.dev.parent = &dev->pdev->dev; 259 260 ib_set_device_ops(&dev->ibdev, &qedr_dev_ops); 261 262 rc = ib_device_set_netdev(&dev->ibdev, dev->ndev, 1); 263 if (rc) 264 return rc; 265 266 dma_set_max_seg_size(&dev->pdev->dev, UINT_MAX); 267 return ib_register_device(&dev->ibdev, "qedr%d", &dev->pdev->dev); 268 } 269 270 /* This function allocates fast-path status block memory */ qedr_alloc_mem_sb(struct qedr_dev * dev,struct qed_sb_info * sb_info,u16 sb_id)271 static int qedr_alloc_mem_sb(struct qedr_dev *dev, 272 struct qed_sb_info *sb_info, u16 sb_id) 273 { 274 struct status_block *sb_virt; 275 dma_addr_t sb_phys; 276 int rc; 277 278 sb_virt = dma_alloc_coherent(&dev->pdev->dev, 279 sizeof(*sb_virt), &sb_phys, GFP_KERNEL); 280 if (!sb_virt) 281 return -ENOMEM; 282 283 rc = dev->ops->common->sb_init(dev->cdev, sb_info, 284 sb_virt, sb_phys, sb_id, 285 QED_SB_TYPE_CNQ); 286 if (rc) { 287 pr_err("Status block initialization failed\n"); 288 dma_free_coherent(&dev->pdev->dev, sizeof(*sb_virt), 289 sb_virt, sb_phys); 290 return rc; 291 } 292 293 return 0; 294 } 295 qedr_free_mem_sb(struct qedr_dev * dev,struct qed_sb_info * sb_info,int sb_id)296 static void qedr_free_mem_sb(struct qedr_dev *dev, 297 struct qed_sb_info *sb_info, int sb_id) 298 { 299 if (sb_info->sb_virt) { 300 dev->ops->common->sb_release(dev->cdev, sb_info, sb_id, 301 QED_SB_TYPE_CNQ); 302 dma_free_coherent(&dev->pdev->dev, sizeof(*sb_info->sb_virt), 303 (void *)sb_info->sb_virt, sb_info->sb_phys); 304 } 305 } 306 qedr_free_resources(struct qedr_dev * dev)307 static void qedr_free_resources(struct qedr_dev *dev) 308 { 309 int i; 310 311 if (IS_IWARP(dev)) 312 destroy_workqueue(dev->iwarp_wq); 313 314 for (i = 0; i < dev->num_cnq; i++) { 315 qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i); 316 dev->ops->common->chain_free(dev->cdev, &dev->cnq_array[i].pbl); 317 } 318 319 kfree(dev->cnq_array); 320 kfree(dev->sb_array); 321 kfree(dev->sgid_tbl); 322 } 323 qedr_alloc_resources(struct qedr_dev * dev)324 static int qedr_alloc_resources(struct qedr_dev *dev) 325 { 326 struct qed_chain_init_params params = { 327 .mode = QED_CHAIN_MODE_PBL, 328 .intended_use = QED_CHAIN_USE_TO_CONSUME, 329 .cnt_type = QED_CHAIN_CNT_TYPE_U16, 330 .elem_size = sizeof(struct regpair *), 331 }; 332 struct qedr_cnq *cnq; 333 __le16 *cons_pi; 334 int i, rc; 335 336 dev->sgid_tbl = kcalloc(QEDR_MAX_SGID, sizeof(union ib_gid), 337 GFP_KERNEL); 338 if (!dev->sgid_tbl) 339 return -ENOMEM; 340 341 spin_lock_init(&dev->sgid_lock); 342 xa_init_flags(&dev->srqs, XA_FLAGS_LOCK_IRQ); 343 344 if (IS_IWARP(dev)) { 345 xa_init(&dev->qps); 346 dev->iwarp_wq = create_singlethread_workqueue("qedr_iwarpq"); 347 if (!dev->iwarp_wq) { 348 rc = -ENOMEM; 349 goto err1; 350 } 351 } 352 353 /* Allocate Status blocks for CNQ */ 354 dev->sb_array = kcalloc(dev->num_cnq, sizeof(*dev->sb_array), 355 GFP_KERNEL); 356 if (!dev->sb_array) { 357 rc = -ENOMEM; 358 goto err_destroy_wq; 359 } 360 361 dev->cnq_array = kcalloc(dev->num_cnq, 362 sizeof(*dev->cnq_array), GFP_KERNEL); 363 if (!dev->cnq_array) { 364 rc = -ENOMEM; 365 goto err2; 366 } 367 368 dev->sb_start = dev->ops->rdma_get_start_sb(dev->cdev); 369 370 /* Allocate CNQ PBLs */ 371 params.num_elems = min_t(u32, QED_RDMA_MAX_CNQ_SIZE, 372 QEDR_ROCE_MAX_CNQ_SIZE); 373 374 for (i = 0; i < dev->num_cnq; i++) { 375 cnq = &dev->cnq_array[i]; 376 377 rc = qedr_alloc_mem_sb(dev, &dev->sb_array[i], 378 dev->sb_start + i); 379 if (rc) 380 goto err3; 381 382 rc = dev->ops->common->chain_alloc(dev->cdev, &cnq->pbl, 383 ¶ms); 384 if (rc) 385 goto err4; 386 387 cnq->dev = dev; 388 cnq->sb = &dev->sb_array[i]; 389 cons_pi = dev->sb_array[i].sb_virt->pi_array; 390 cnq->hw_cons_ptr = &cons_pi[QED_ROCE_PROTOCOL_INDEX]; 391 cnq->index = i; 392 sprintf(cnq->name, "qedr%d@pci:%s", i, pci_name(dev->pdev)); 393 394 DP_DEBUG(dev, QEDR_MSG_INIT, "cnq[%d].cons=%d\n", 395 i, qed_chain_get_cons_idx(&cnq->pbl)); 396 } 397 398 return 0; 399 err4: 400 qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i); 401 err3: 402 for (--i; i >= 0; i--) { 403 dev->ops->common->chain_free(dev->cdev, &dev->cnq_array[i].pbl); 404 qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i); 405 } 406 kfree(dev->cnq_array); 407 err2: 408 kfree(dev->sb_array); 409 err_destroy_wq: 410 if (IS_IWARP(dev)) 411 destroy_workqueue(dev->iwarp_wq); 412 err1: 413 kfree(dev->sgid_tbl); 414 return rc; 415 } 416 qedr_pci_set_atomic(struct qedr_dev * dev,struct pci_dev * pdev)417 static void qedr_pci_set_atomic(struct qedr_dev *dev, struct pci_dev *pdev) 418 { 419 int rc = pci_enable_atomic_ops_to_root(pdev, 420 PCI_EXP_DEVCAP2_ATOMIC_COMP64); 421 422 if (rc) { 423 dev->atomic_cap = IB_ATOMIC_NONE; 424 DP_DEBUG(dev, QEDR_MSG_INIT, "Atomic capability disabled\n"); 425 } else { 426 dev->atomic_cap = IB_ATOMIC_GLOB; 427 DP_DEBUG(dev, QEDR_MSG_INIT, "Atomic capability enabled\n"); 428 } 429 } 430 431 static const struct qed_rdma_ops *qed_ops; 432 433 #define HILO_U64(hi, lo) ((((u64)(hi)) << 32) + (lo)) 434 qedr_irq_handler(int irq,void * handle)435 static irqreturn_t qedr_irq_handler(int irq, void *handle) 436 { 437 u16 hw_comp_cons, sw_comp_cons; 438 struct qedr_cnq *cnq = handle; 439 struct regpair *cq_handle; 440 struct qedr_cq *cq; 441 442 qed_sb_ack(cnq->sb, IGU_INT_DISABLE, 0); 443 444 qed_sb_update_sb_idx(cnq->sb); 445 446 hw_comp_cons = le16_to_cpu(*cnq->hw_cons_ptr); 447 sw_comp_cons = qed_chain_get_cons_idx(&cnq->pbl); 448 449 /* Align protocol-index and chain reads */ 450 rmb(); 451 452 while (sw_comp_cons != hw_comp_cons) { 453 cq_handle = (struct regpair *)qed_chain_consume(&cnq->pbl); 454 cq = (struct qedr_cq *)(uintptr_t)HILO_U64(cq_handle->hi, 455 cq_handle->lo); 456 457 if (cq == NULL) { 458 DP_ERR(cnq->dev, 459 "Received NULL CQ cq_handle->hi=%d cq_handle->lo=%d sw_comp_cons=%d hw_comp_cons=%d\n", 460 cq_handle->hi, cq_handle->lo, sw_comp_cons, 461 hw_comp_cons); 462 463 break; 464 } 465 466 if (cq->sig != QEDR_CQ_MAGIC_NUMBER) { 467 DP_ERR(cnq->dev, 468 "Problem with cq signature, cq_handle->hi=%d ch_handle->lo=%d cq=%p\n", 469 cq_handle->hi, cq_handle->lo, cq); 470 break; 471 } 472 473 cq->arm_flags = 0; 474 475 if (!cq->destroyed && cq->ibcq.comp_handler) 476 (*cq->ibcq.comp_handler) 477 (&cq->ibcq, cq->ibcq.cq_context); 478 479 /* The CQ's CNQ notification counter is checked before 480 * destroying the CQ in a busy-wait loop that waits for all of 481 * the CQ's CNQ interrupts to be processed. It is increased 482 * here, only after the completion handler, to ensure that 483 * the handler is not running when the CQ is destroyed. 484 */ 485 cq->cnq_notif++; 486 487 sw_comp_cons = qed_chain_get_cons_idx(&cnq->pbl); 488 489 cnq->n_comp++; 490 } 491 492 qed_ops->rdma_cnq_prod_update(cnq->dev->rdma_ctx, cnq->index, 493 sw_comp_cons); 494 495 qed_sb_ack(cnq->sb, IGU_INT_ENABLE, 1); 496 497 return IRQ_HANDLED; 498 } 499 qedr_sync_free_irqs(struct qedr_dev * dev)500 static void qedr_sync_free_irqs(struct qedr_dev *dev) 501 { 502 u32 vector; 503 u16 idx; 504 int i; 505 506 for (i = 0; i < dev->int_info.used_cnt; i++) { 507 if (dev->int_info.msix_cnt) { 508 idx = i * dev->num_hwfns + dev->affin_hwfn_idx; 509 vector = dev->int_info.msix[idx].vector; 510 free_irq(vector, &dev->cnq_array[i]); 511 } 512 } 513 514 dev->int_info.used_cnt = 0; 515 } 516 qedr_req_msix_irqs(struct qedr_dev * dev)517 static int qedr_req_msix_irqs(struct qedr_dev *dev) 518 { 519 int i, rc = 0; 520 u16 idx; 521 522 if (dev->num_cnq > dev->int_info.msix_cnt) { 523 DP_ERR(dev, 524 "Interrupt mismatch: %d CNQ queues > %d MSI-x vectors\n", 525 dev->num_cnq, dev->int_info.msix_cnt); 526 return -EINVAL; 527 } 528 529 for (i = 0; i < dev->num_cnq; i++) { 530 idx = i * dev->num_hwfns + dev->affin_hwfn_idx; 531 rc = request_irq(dev->int_info.msix[idx].vector, 532 qedr_irq_handler, 0, dev->cnq_array[i].name, 533 &dev->cnq_array[i]); 534 if (rc) { 535 DP_ERR(dev, "Request cnq %d irq failed\n", i); 536 qedr_sync_free_irqs(dev); 537 } else { 538 DP_DEBUG(dev, QEDR_MSG_INIT, 539 "Requested cnq irq for %s [entry %d]. Cookie is at %p\n", 540 dev->cnq_array[i].name, i, 541 &dev->cnq_array[i]); 542 dev->int_info.used_cnt++; 543 } 544 } 545 546 return rc; 547 } 548 qedr_setup_irqs(struct qedr_dev * dev)549 static int qedr_setup_irqs(struct qedr_dev *dev) 550 { 551 int rc; 552 553 DP_DEBUG(dev, QEDR_MSG_INIT, "qedr_setup_irqs\n"); 554 555 /* Learn Interrupt configuration */ 556 rc = dev->ops->rdma_set_rdma_int(dev->cdev, dev->num_cnq); 557 if (rc < 0) 558 return rc; 559 560 rc = dev->ops->rdma_get_rdma_int(dev->cdev, &dev->int_info); 561 if (rc) { 562 DP_DEBUG(dev, QEDR_MSG_INIT, "get_rdma_int failed\n"); 563 return rc; 564 } 565 566 if (dev->int_info.msix_cnt) { 567 DP_DEBUG(dev, QEDR_MSG_INIT, "rdma msix_cnt = %d\n", 568 dev->int_info.msix_cnt); 569 rc = qedr_req_msix_irqs(dev); 570 if (rc) 571 return rc; 572 } 573 574 DP_DEBUG(dev, QEDR_MSG_INIT, "qedr_setup_irqs succeeded\n"); 575 576 return 0; 577 } 578 qedr_set_device_attr(struct qedr_dev * dev)579 static int qedr_set_device_attr(struct qedr_dev *dev) 580 { 581 struct qed_rdma_device *qed_attr; 582 struct qedr_device_attr *attr; 583 u32 page_size; 584 585 /* Part 1 - query core capabilities */ 586 qed_attr = dev->ops->rdma_query_device(dev->rdma_ctx); 587 588 /* Part 2 - check capabilities */ 589 page_size = ~qed_attr->page_size_caps + 1; 590 if (page_size > PAGE_SIZE) { 591 DP_ERR(dev, 592 "Kernel PAGE_SIZE is %ld which is smaller than minimum page size (%d) required by qedr\n", 593 PAGE_SIZE, page_size); 594 return -ENODEV; 595 } 596 597 /* Part 3 - copy and update capabilities */ 598 attr = &dev->attr; 599 attr->vendor_id = qed_attr->vendor_id; 600 attr->vendor_part_id = qed_attr->vendor_part_id; 601 attr->hw_ver = qed_attr->hw_ver; 602 attr->fw_ver = qed_attr->fw_ver; 603 attr->node_guid = qed_attr->node_guid; 604 attr->sys_image_guid = qed_attr->sys_image_guid; 605 attr->max_cnq = qed_attr->max_cnq; 606 attr->max_sge = qed_attr->max_sge; 607 attr->max_inline = qed_attr->max_inline; 608 attr->max_sqe = min_t(u32, qed_attr->max_wqe, QEDR_MAX_SQE); 609 attr->max_rqe = min_t(u32, qed_attr->max_wqe, QEDR_MAX_RQE); 610 attr->max_qp_resp_rd_atomic_resc = qed_attr->max_qp_resp_rd_atomic_resc; 611 attr->max_qp_req_rd_atomic_resc = qed_attr->max_qp_req_rd_atomic_resc; 612 attr->max_dev_resp_rd_atomic_resc = 613 qed_attr->max_dev_resp_rd_atomic_resc; 614 attr->max_cq = qed_attr->max_cq; 615 attr->max_qp = qed_attr->max_qp; 616 attr->max_mr = qed_attr->max_mr; 617 attr->max_mr_size = qed_attr->max_mr_size; 618 attr->max_cqe = min_t(u64, qed_attr->max_cqe, QEDR_MAX_CQES); 619 attr->max_mw = qed_attr->max_mw; 620 attr->max_mr_mw_fmr_pbl = qed_attr->max_mr_mw_fmr_pbl; 621 attr->max_mr_mw_fmr_size = qed_attr->max_mr_mw_fmr_size; 622 attr->max_pd = qed_attr->max_pd; 623 attr->max_ah = qed_attr->max_ah; 624 attr->max_pkey = qed_attr->max_pkey; 625 attr->max_srq = qed_attr->max_srq; 626 attr->max_srq_wr = qed_attr->max_srq_wr; 627 attr->dev_caps = qed_attr->dev_caps; 628 attr->page_size_caps = qed_attr->page_size_caps; 629 attr->dev_ack_delay = qed_attr->dev_ack_delay; 630 attr->reserved_lkey = qed_attr->reserved_lkey; 631 attr->bad_pkey_counter = qed_attr->bad_pkey_counter; 632 attr->max_stats_queues = qed_attr->max_stats_queues; 633 634 return 0; 635 } 636 qedr_unaffiliated_event(void * context,u8 event_code)637 static void qedr_unaffiliated_event(void *context, u8 event_code) 638 { 639 pr_err("unaffiliated event not implemented yet\n"); 640 } 641 qedr_affiliated_event(void * context,u8 e_code,void * fw_handle)642 static void qedr_affiliated_event(void *context, u8 e_code, void *fw_handle) 643 { 644 #define EVENT_TYPE_NOT_DEFINED 0 645 #define EVENT_TYPE_CQ 1 646 #define EVENT_TYPE_QP 2 647 #define EVENT_TYPE_SRQ 3 648 struct qedr_dev *dev = (struct qedr_dev *)context; 649 struct regpair *async_handle = (struct regpair *)fw_handle; 650 u64 roce_handle64 = ((u64) async_handle->hi << 32) + async_handle->lo; 651 u8 event_type = EVENT_TYPE_NOT_DEFINED; 652 struct ib_event event; 653 struct ib_srq *ibsrq; 654 struct qedr_srq *srq; 655 unsigned long flags; 656 struct ib_cq *ibcq; 657 struct ib_qp *ibqp; 658 struct qedr_cq *cq; 659 struct qedr_qp *qp; 660 u16 srq_id; 661 662 if (IS_ROCE(dev)) { 663 switch (e_code) { 664 case ROCE_ASYNC_EVENT_CQ_OVERFLOW_ERR: 665 event.event = IB_EVENT_CQ_ERR; 666 event_type = EVENT_TYPE_CQ; 667 break; 668 case ROCE_ASYNC_EVENT_SQ_DRAINED: 669 event.event = IB_EVENT_SQ_DRAINED; 670 event_type = EVENT_TYPE_QP; 671 break; 672 case ROCE_ASYNC_EVENT_QP_CATASTROPHIC_ERR: 673 event.event = IB_EVENT_QP_FATAL; 674 event_type = EVENT_TYPE_QP; 675 break; 676 case ROCE_ASYNC_EVENT_LOCAL_INVALID_REQUEST_ERR: 677 event.event = IB_EVENT_QP_REQ_ERR; 678 event_type = EVENT_TYPE_QP; 679 break; 680 case ROCE_ASYNC_EVENT_LOCAL_ACCESS_ERR: 681 event.event = IB_EVENT_QP_ACCESS_ERR; 682 event_type = EVENT_TYPE_QP; 683 break; 684 case ROCE_ASYNC_EVENT_SRQ_LIMIT: 685 event.event = IB_EVENT_SRQ_LIMIT_REACHED; 686 event_type = EVENT_TYPE_SRQ; 687 break; 688 case ROCE_ASYNC_EVENT_SRQ_EMPTY: 689 event.event = IB_EVENT_SRQ_ERR; 690 event_type = EVENT_TYPE_SRQ; 691 break; 692 case ROCE_ASYNC_EVENT_XRC_DOMAIN_ERR: 693 event.event = IB_EVENT_QP_ACCESS_ERR; 694 event_type = EVENT_TYPE_QP; 695 break; 696 case ROCE_ASYNC_EVENT_INVALID_XRCETH_ERR: 697 event.event = IB_EVENT_QP_ACCESS_ERR; 698 event_type = EVENT_TYPE_QP; 699 break; 700 case ROCE_ASYNC_EVENT_XRC_SRQ_CATASTROPHIC_ERR: 701 event.event = IB_EVENT_CQ_ERR; 702 event_type = EVENT_TYPE_CQ; 703 break; 704 default: 705 DP_ERR(dev, "unsupported event %d on handle=%llx\n", 706 e_code, roce_handle64); 707 } 708 } else { 709 switch (e_code) { 710 case QED_IWARP_EVENT_SRQ_LIMIT: 711 event.event = IB_EVENT_SRQ_LIMIT_REACHED; 712 event_type = EVENT_TYPE_SRQ; 713 break; 714 case QED_IWARP_EVENT_SRQ_EMPTY: 715 event.event = IB_EVENT_SRQ_ERR; 716 event_type = EVENT_TYPE_SRQ; 717 break; 718 default: 719 DP_ERR(dev, "unsupported event %d on handle=%llx\n", e_code, 720 roce_handle64); 721 } 722 } 723 switch (event_type) { 724 case EVENT_TYPE_CQ: 725 cq = (struct qedr_cq *)(uintptr_t)roce_handle64; 726 if (cq) { 727 ibcq = &cq->ibcq; 728 if (ibcq->event_handler) { 729 event.device = ibcq->device; 730 event.element.cq = ibcq; 731 ibcq->event_handler(&event, ibcq->cq_context); 732 } 733 } else { 734 WARN(1, 735 "Error: CQ event with NULL pointer ibcq. Handle=%llx\n", 736 roce_handle64); 737 } 738 DP_ERR(dev, "CQ event %d on handle %p\n", e_code, cq); 739 break; 740 case EVENT_TYPE_QP: 741 qp = (struct qedr_qp *)(uintptr_t)roce_handle64; 742 if (qp) { 743 ibqp = &qp->ibqp; 744 if (ibqp->event_handler) { 745 event.device = ibqp->device; 746 event.element.qp = ibqp; 747 ibqp->event_handler(&event, ibqp->qp_context); 748 } 749 } else { 750 WARN(1, 751 "Error: QP event with NULL pointer ibqp. Handle=%llx\n", 752 roce_handle64); 753 } 754 DP_ERR(dev, "QP event %d on handle %p\n", e_code, qp); 755 break; 756 case EVENT_TYPE_SRQ: 757 srq_id = (u16)roce_handle64; 758 xa_lock_irqsave(&dev->srqs, flags); 759 srq = xa_load(&dev->srqs, srq_id); 760 if (srq) { 761 ibsrq = &srq->ibsrq; 762 if (ibsrq->event_handler) { 763 event.device = ibsrq->device; 764 event.element.srq = ibsrq; 765 ibsrq->event_handler(&event, 766 ibsrq->srq_context); 767 } 768 } else { 769 DP_NOTICE(dev, 770 "SRQ event with NULL pointer ibsrq. Handle=%llx\n", 771 roce_handle64); 772 } 773 xa_unlock_irqrestore(&dev->srqs, flags); 774 DP_NOTICE(dev, "SRQ event %d on handle %p\n", e_code, srq); 775 break; 776 default: 777 break; 778 } 779 } 780 qedr_init_hw(struct qedr_dev * dev)781 static int qedr_init_hw(struct qedr_dev *dev) 782 { 783 struct qed_rdma_add_user_out_params out_params; 784 struct qed_rdma_start_in_params *in_params; 785 struct qed_rdma_cnq_params *cur_pbl; 786 struct qed_rdma_events events; 787 dma_addr_t p_phys_table; 788 u32 page_cnt; 789 int rc = 0; 790 int i; 791 792 in_params = kzalloc(sizeof(*in_params), GFP_KERNEL); 793 if (!in_params) { 794 rc = -ENOMEM; 795 goto out; 796 } 797 798 in_params->desired_cnq = dev->num_cnq; 799 for (i = 0; i < dev->num_cnq; i++) { 800 cur_pbl = &in_params->cnq_pbl_list[i]; 801 802 page_cnt = qed_chain_get_page_cnt(&dev->cnq_array[i].pbl); 803 cur_pbl->num_pbl_pages = page_cnt; 804 805 p_phys_table = qed_chain_get_pbl_phys(&dev->cnq_array[i].pbl); 806 cur_pbl->pbl_ptr = (u64)p_phys_table; 807 } 808 809 events.affiliated_event = qedr_affiliated_event; 810 events.unaffiliated_event = qedr_unaffiliated_event; 811 events.context = dev; 812 813 in_params->events = &events; 814 in_params->cq_mode = QED_RDMA_CQ_MODE_32_BITS; 815 in_params->max_mtu = dev->ndev->mtu; 816 dev->iwarp_max_mtu = dev->ndev->mtu; 817 ether_addr_copy(&in_params->mac_addr[0], dev->ndev->dev_addr); 818 819 rc = dev->ops->rdma_init(dev->cdev, in_params); 820 if (rc) 821 goto out; 822 823 rc = dev->ops->rdma_add_user(dev->rdma_ctx, &out_params); 824 if (rc) 825 goto out; 826 827 dev->db_addr = out_params.dpi_addr; 828 dev->db_phys_addr = out_params.dpi_phys_addr; 829 dev->db_size = out_params.dpi_size; 830 dev->dpi = out_params.dpi; 831 832 rc = qedr_set_device_attr(dev); 833 out: 834 kfree(in_params); 835 if (rc) 836 DP_ERR(dev, "Init HW Failed rc = %d\n", rc); 837 838 return rc; 839 } 840 qedr_stop_hw(struct qedr_dev * dev)841 static void qedr_stop_hw(struct qedr_dev *dev) 842 { 843 dev->ops->rdma_remove_user(dev->rdma_ctx, dev->dpi); 844 dev->ops->rdma_stop(dev->rdma_ctx); 845 } 846 qedr_add(struct qed_dev * cdev,struct pci_dev * pdev,struct net_device * ndev)847 static struct qedr_dev *qedr_add(struct qed_dev *cdev, struct pci_dev *pdev, 848 struct net_device *ndev) 849 { 850 struct qed_dev_rdma_info dev_info; 851 struct qedr_dev *dev; 852 int rc = 0; 853 854 dev = ib_alloc_device(qedr_dev, ibdev); 855 if (!dev) { 856 pr_err("Unable to allocate ib device\n"); 857 return NULL; 858 } 859 860 DP_DEBUG(dev, QEDR_MSG_INIT, "qedr add device called\n"); 861 862 dev->pdev = pdev; 863 dev->ndev = ndev; 864 dev->cdev = cdev; 865 866 qed_ops = qed_get_rdma_ops(); 867 if (!qed_ops) { 868 DP_ERR(dev, "Failed to get qed roce operations\n"); 869 goto init_err; 870 } 871 872 dev->ops = qed_ops; 873 rc = qed_ops->fill_dev_info(cdev, &dev_info); 874 if (rc) 875 goto init_err; 876 877 dev->user_dpm_enabled = dev_info.user_dpm_enabled; 878 dev->rdma_type = dev_info.rdma_type; 879 dev->num_hwfns = dev_info.common.num_hwfns; 880 881 if (IS_IWARP(dev) && QEDR_IS_CMT(dev)) { 882 rc = dev->ops->iwarp_set_engine_affin(cdev, false); 883 if (rc) { 884 DP_ERR(dev, "iWARP is disabled over a 100g device Enabling it may impact L2 performance. To enable it run devlink dev param set <dev> name iwarp_cmt value true cmode runtime\n"); 885 goto init_err; 886 } 887 } 888 dev->affin_hwfn_idx = dev->ops->common->get_affin_hwfn_idx(cdev); 889 890 dev->rdma_ctx = dev->ops->rdma_get_rdma_ctx(cdev); 891 892 dev->num_cnq = dev->ops->rdma_get_min_cnq_msix(cdev); 893 if (!dev->num_cnq) { 894 DP_ERR(dev, "Failed. At least one CNQ is required.\n"); 895 rc = -ENOMEM; 896 goto init_err; 897 } 898 899 dev->wq_multiplier = QEDR_WQ_MULTIPLIER_DFT; 900 901 qedr_pci_set_atomic(dev, pdev); 902 903 rc = qedr_alloc_resources(dev); 904 if (rc) 905 goto init_err; 906 907 rc = qedr_init_hw(dev); 908 if (rc) 909 goto alloc_err; 910 911 rc = qedr_setup_irqs(dev); 912 if (rc) 913 goto irq_err; 914 915 rc = qedr_register_device(dev); 916 if (rc) { 917 DP_ERR(dev, "Unable to allocate register device\n"); 918 goto reg_err; 919 } 920 921 if (!test_and_set_bit(QEDR_ENET_STATE_BIT, &dev->enet_state)) 922 qedr_ib_dispatch_event(dev, QEDR_PORT, IB_EVENT_PORT_ACTIVE); 923 924 DP_DEBUG(dev, QEDR_MSG_INIT, "qedr driver loaded successfully\n"); 925 return dev; 926 927 reg_err: 928 qedr_sync_free_irqs(dev); 929 irq_err: 930 qedr_stop_hw(dev); 931 alloc_err: 932 qedr_free_resources(dev); 933 init_err: 934 ib_dealloc_device(&dev->ibdev); 935 DP_ERR(dev, "qedr driver load failed rc=%d\n", rc); 936 937 return NULL; 938 } 939 qedr_remove(struct qedr_dev * dev)940 static void qedr_remove(struct qedr_dev *dev) 941 { 942 /* First unregister with stack to stop all the active traffic 943 * of the registered clients. 944 */ 945 ib_unregister_device(&dev->ibdev); 946 947 qedr_stop_hw(dev); 948 qedr_sync_free_irqs(dev); 949 qedr_free_resources(dev); 950 951 if (IS_IWARP(dev) && QEDR_IS_CMT(dev)) 952 dev->ops->iwarp_set_engine_affin(dev->cdev, true); 953 954 ib_dealloc_device(&dev->ibdev); 955 } 956 qedr_close(struct qedr_dev * dev)957 static void qedr_close(struct qedr_dev *dev) 958 { 959 if (test_and_clear_bit(QEDR_ENET_STATE_BIT, &dev->enet_state)) 960 qedr_ib_dispatch_event(dev, QEDR_PORT, IB_EVENT_PORT_ERR); 961 } 962 qedr_shutdown(struct qedr_dev * dev)963 static void qedr_shutdown(struct qedr_dev *dev) 964 { 965 qedr_close(dev); 966 qedr_remove(dev); 967 } 968 qedr_open(struct qedr_dev * dev)969 static void qedr_open(struct qedr_dev *dev) 970 { 971 if (!test_and_set_bit(QEDR_ENET_STATE_BIT, &dev->enet_state)) 972 qedr_ib_dispatch_event(dev, QEDR_PORT, IB_EVENT_PORT_ACTIVE); 973 } 974 qedr_mac_address_change(struct qedr_dev * dev)975 static void qedr_mac_address_change(struct qedr_dev *dev) 976 { 977 union ib_gid *sgid = &dev->sgid_tbl[0]; 978 u8 guid[8], mac_addr[6]; 979 int rc; 980 981 /* Update SGID */ 982 ether_addr_copy(&mac_addr[0], dev->ndev->dev_addr); 983 guid[0] = mac_addr[0] ^ 2; 984 guid[1] = mac_addr[1]; 985 guid[2] = mac_addr[2]; 986 guid[3] = 0xff; 987 guid[4] = 0xfe; 988 guid[5] = mac_addr[3]; 989 guid[6] = mac_addr[4]; 990 guid[7] = mac_addr[5]; 991 sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL); 992 memcpy(&sgid->raw[8], guid, sizeof(guid)); 993 994 /* Update LL2 */ 995 rc = dev->ops->ll2_set_mac_filter(dev->cdev, 996 dev->gsi_ll2_mac_address, 997 dev->ndev->dev_addr); 998 999 ether_addr_copy(dev->gsi_ll2_mac_address, dev->ndev->dev_addr); 1000 1001 qedr_ib_dispatch_event(dev, QEDR_PORT, IB_EVENT_GID_CHANGE); 1002 1003 if (rc) 1004 DP_ERR(dev, "Error updating mac filter\n"); 1005 } 1006 1007 /* event handling via NIC driver ensures that all the NIC specific 1008 * initialization done before RoCE driver notifies 1009 * event to stack. 1010 */ qedr_notify(struct qedr_dev * dev,enum qede_rdma_event event)1011 static void qedr_notify(struct qedr_dev *dev, enum qede_rdma_event event) 1012 { 1013 switch (event) { 1014 case QEDE_UP: 1015 qedr_open(dev); 1016 break; 1017 case QEDE_DOWN: 1018 qedr_close(dev); 1019 break; 1020 case QEDE_CLOSE: 1021 qedr_shutdown(dev); 1022 break; 1023 case QEDE_CHANGE_ADDR: 1024 qedr_mac_address_change(dev); 1025 break; 1026 case QEDE_CHANGE_MTU: 1027 if (rdma_protocol_iwarp(&dev->ibdev, 1)) 1028 if (dev->ndev->mtu != dev->iwarp_max_mtu) 1029 DP_NOTICE(dev, 1030 "Mtu was changed from %d to %d. This will not take affect for iWARP until qedr is reloaded\n", 1031 dev->iwarp_max_mtu, dev->ndev->mtu); 1032 break; 1033 default: 1034 pr_err("Event not supported\n"); 1035 } 1036 } 1037 1038 static struct qedr_driver qedr_drv = { 1039 .name = "qedr_driver", 1040 .add = qedr_add, 1041 .remove = qedr_remove, 1042 .notify = qedr_notify, 1043 }; 1044 qedr_init_module(void)1045 static int __init qedr_init_module(void) 1046 { 1047 return qede_rdma_register_driver(&qedr_drv); 1048 } 1049 qedr_exit_module(void)1050 static void __exit qedr_exit_module(void) 1051 { 1052 qede_rdma_unregister_driver(&qedr_drv); 1053 } 1054 1055 module_init(qedr_init_module); 1056 module_exit(qedr_exit_module); 1057