1 /* 2 * Copyright (c) 2007 Cisco Systems, 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 33 #include <rdma/ib_mad.h> 34 #include <rdma/ib_smi.h> 35 #include <rdma/ib_sa.h> 36 #include <rdma/ib_cache.h> 37 38 #include <linux/random.h> 39 #include <linux/mlx4/cmd.h> 40 #include <linux/gfp.h> 41 #include <rdma/ib_pma.h> 42 #include <linux/ip.h> 43 #include <net/ipv6.h> 44 45 #include <linux/mlx4/driver.h> 46 #include "mlx4_ib.h" 47 48 enum { 49 MLX4_IB_VENDOR_CLASS1 = 0x9, 50 MLX4_IB_VENDOR_CLASS2 = 0xa 51 }; 52 53 #define MLX4_TUN_SEND_WRID_SHIFT 34 54 #define MLX4_TUN_QPN_SHIFT 32 55 #define MLX4_TUN_WRID_RECV (((u64) 1) << MLX4_TUN_SEND_WRID_SHIFT) 56 #define MLX4_TUN_SET_WRID_QPN(a) (((u64) ((a) & 0x3)) << MLX4_TUN_QPN_SHIFT) 57 58 #define MLX4_TUN_IS_RECV(a) (((a) >> MLX4_TUN_SEND_WRID_SHIFT) & 0x1) 59 #define MLX4_TUN_WRID_QPN(a) (((a) >> MLX4_TUN_QPN_SHIFT) & 0x3) 60 61 /* Port mgmt change event handling */ 62 63 #define GET_BLK_PTR_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.block_ptr) 64 #define GET_MASK_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.tbl_entries_mask) 65 #define NUM_IDX_IN_PKEY_TBL_BLK 32 66 #define GUID_TBL_ENTRY_SIZE 8 /* size in bytes */ 67 #define GUID_TBL_BLK_NUM_ENTRIES 8 68 #define GUID_TBL_BLK_SIZE (GUID_TBL_ENTRY_SIZE * GUID_TBL_BLK_NUM_ENTRIES) 69 70 struct mlx4_mad_rcv_buf { 71 struct ib_grh grh; 72 u8 payload[256]; 73 } __packed; 74 75 struct mlx4_mad_snd_buf { 76 u8 payload[256]; 77 } __packed; 78 79 struct mlx4_tunnel_mad { 80 struct ib_grh grh; 81 struct mlx4_ib_tunnel_header hdr; 82 struct ib_mad mad; 83 } __packed; 84 85 struct mlx4_rcv_tunnel_mad { 86 struct mlx4_rcv_tunnel_hdr hdr; 87 struct ib_grh grh; 88 struct ib_mad mad; 89 } __packed; 90 91 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u32 port_num); 92 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u32 port_num); 93 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num, 94 int block, u32 change_bitmap); 95 96 __be64 mlx4_ib_gen_node_guid(void) 97 { 98 #define NODE_GUID_HI ((u64) (((u64)IB_OPENIB_OUI) << 40)) 99 return cpu_to_be64(NODE_GUID_HI | get_random_u32()); 100 } 101 102 __be64 mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx *ctx) 103 { 104 return cpu_to_be64(atomic_inc_return(&ctx->tid)) | 105 cpu_to_be64(0xff00000000000000LL); 106 } 107 108 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags, 109 int port, const struct ib_wc *in_wc, 110 const struct ib_grh *in_grh, 111 const void *in_mad, void *response_mad) 112 { 113 struct mlx4_cmd_mailbox *inmailbox, *outmailbox; 114 void *inbox; 115 int err; 116 u32 in_modifier = port; 117 u8 op_modifier = 0; 118 119 inmailbox = mlx4_alloc_cmd_mailbox(dev->dev); 120 if (IS_ERR(inmailbox)) 121 return PTR_ERR(inmailbox); 122 inbox = inmailbox->buf; 123 124 outmailbox = mlx4_alloc_cmd_mailbox(dev->dev); 125 if (IS_ERR(outmailbox)) { 126 mlx4_free_cmd_mailbox(dev->dev, inmailbox); 127 return PTR_ERR(outmailbox); 128 } 129 130 memcpy(inbox, in_mad, 256); 131 132 /* 133 * Key check traps can't be generated unless we have in_wc to 134 * tell us where to send the trap. 135 */ 136 if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_MKEY) || !in_wc) 137 op_modifier |= 0x1; 138 if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_BKEY) || !in_wc) 139 op_modifier |= 0x2; 140 if (mlx4_is_mfunc(dev->dev) && 141 (mad_ifc_flags & MLX4_MAD_IFC_NET_VIEW || in_wc)) 142 op_modifier |= 0x8; 143 144 if (in_wc) { 145 struct { 146 __be32 my_qpn; 147 u32 reserved1; 148 __be32 rqpn; 149 u8 sl; 150 u8 g_path; 151 u16 reserved2[2]; 152 __be16 pkey; 153 u32 reserved3[11]; 154 u8 grh[40]; 155 } *ext_info; 156 157 memset(inbox + 256, 0, 256); 158 ext_info = inbox + 256; 159 160 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num); 161 ext_info->rqpn = cpu_to_be32(in_wc->src_qp); 162 ext_info->sl = in_wc->sl << 4; 163 ext_info->g_path = in_wc->dlid_path_bits | 164 (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0); 165 ext_info->pkey = cpu_to_be16(in_wc->pkey_index); 166 167 if (in_grh) 168 memcpy(ext_info->grh, in_grh, 40); 169 170 op_modifier |= 0x4; 171 172 in_modifier |= ib_lid_cpu16(in_wc->slid) << 16; 173 } 174 175 err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier, 176 mlx4_is_master(dev->dev) ? (op_modifier & ~0x8) : op_modifier, 177 MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C, 178 (op_modifier & 0x8) ? MLX4_CMD_NATIVE : MLX4_CMD_WRAPPED); 179 180 if (!err) 181 memcpy(response_mad, outmailbox->buf, 256); 182 183 mlx4_free_cmd_mailbox(dev->dev, inmailbox); 184 mlx4_free_cmd_mailbox(dev->dev, outmailbox); 185 186 return err; 187 } 188 189 static void update_sm_ah(struct mlx4_ib_dev *dev, u32 port_num, u16 lid, u8 sl) 190 { 191 struct ib_ah *new_ah; 192 struct rdma_ah_attr ah_attr; 193 unsigned long flags; 194 195 if (!dev->send_agent[port_num - 1][0]) 196 return; 197 198 memset(&ah_attr, 0, sizeof ah_attr); 199 ah_attr.type = rdma_ah_find_type(&dev->ib_dev, port_num); 200 rdma_ah_set_dlid(&ah_attr, lid); 201 rdma_ah_set_sl(&ah_attr, sl); 202 rdma_ah_set_port_num(&ah_attr, port_num); 203 204 new_ah = rdma_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, 205 &ah_attr, 0); 206 if (IS_ERR(new_ah)) 207 return; 208 209 spin_lock_irqsave(&dev->sm_lock, flags); 210 if (dev->sm_ah[port_num - 1]) 211 rdma_destroy_ah(dev->sm_ah[port_num - 1], 0); 212 dev->sm_ah[port_num - 1] = new_ah; 213 spin_unlock_irqrestore(&dev->sm_lock, flags); 214 } 215 216 /* 217 * Snoop SM MADs for port info, GUID info, and P_Key table sets, so we can 218 * synthesize LID change, Client-Rereg, GID change, and P_Key change events. 219 */ 220 static void smp_snoop(struct ib_device *ibdev, u32 port_num, 221 const struct ib_mad *mad, u16 prev_lid) 222 { 223 struct ib_port_info *pinfo; 224 u16 lid; 225 __be16 *base; 226 u32 bn, pkey_change_bitmap; 227 int i; 228 229 230 struct mlx4_ib_dev *dev = to_mdev(ibdev); 231 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 232 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 233 mad->mad_hdr.method == IB_MGMT_METHOD_SET) 234 switch (mad->mad_hdr.attr_id) { 235 case IB_SMP_ATTR_PORT_INFO: 236 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV) 237 return; 238 pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data; 239 lid = be16_to_cpu(pinfo->lid); 240 241 update_sm_ah(dev, port_num, 242 be16_to_cpu(pinfo->sm_lid), 243 pinfo->neighbormtu_mastersmsl & 0xf); 244 245 if (pinfo->clientrereg_resv_subnetto & 0x80) 246 handle_client_rereg_event(dev, port_num); 247 248 if (prev_lid != lid) 249 handle_lid_change_event(dev, port_num); 250 break; 251 252 case IB_SMP_ATTR_PKEY_TABLE: 253 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV) 254 return; 255 if (!mlx4_is_mfunc(dev->dev)) { 256 mlx4_ib_dispatch_event(dev, port_num, 257 IB_EVENT_PKEY_CHANGE); 258 break; 259 } 260 261 /* at this point, we are running in the master. 262 * Slaves do not receive SMPs. 263 */ 264 bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod) & 0xFFFF; 265 base = (__be16 *) &(((struct ib_smp *)mad)->data[0]); 266 pkey_change_bitmap = 0; 267 for (i = 0; i < 32; i++) { 268 pr_debug("PKEY[%d] = x%x\n", 269 i + bn*32, be16_to_cpu(base[i])); 270 if (be16_to_cpu(base[i]) != 271 dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32]) { 272 pkey_change_bitmap |= (1 << i); 273 dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32] = 274 be16_to_cpu(base[i]); 275 } 276 } 277 pr_debug("PKEY Change event: port=%u, " 278 "block=0x%x, change_bitmap=0x%x\n", 279 port_num, bn, pkey_change_bitmap); 280 281 if (pkey_change_bitmap) { 282 mlx4_ib_dispatch_event(dev, port_num, 283 IB_EVENT_PKEY_CHANGE); 284 if (!dev->sriov.is_going_down) 285 __propagate_pkey_ev(dev, port_num, bn, 286 pkey_change_bitmap); 287 } 288 break; 289 290 case IB_SMP_ATTR_GUID_INFO: 291 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV) 292 return; 293 /* paravirtualized master's guid is guid 0 -- does not change */ 294 if (!mlx4_is_master(dev->dev)) 295 mlx4_ib_dispatch_event(dev, port_num, 296 IB_EVENT_GID_CHANGE); 297 /*if master, notify relevant slaves*/ 298 if (mlx4_is_master(dev->dev) && 299 !dev->sriov.is_going_down) { 300 bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod); 301 mlx4_ib_update_cache_on_guid_change(dev, bn, port_num, 302 (u8 *)(&((struct ib_smp *)mad)->data)); 303 mlx4_ib_notify_slaves_on_guid_change(dev, bn, port_num, 304 (u8 *)(&((struct ib_smp *)mad)->data)); 305 } 306 break; 307 308 case IB_SMP_ATTR_SL_TO_VL_TABLE: 309 /* cache sl to vl mapping changes for use in 310 * filling QP1 LRH VL field when sending packets 311 */ 312 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV && 313 dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT) 314 return; 315 if (!mlx4_is_slave(dev->dev)) { 316 union sl2vl_tbl_to_u64 sl2vl64; 317 int jj; 318 319 for (jj = 0; jj < 8; jj++) { 320 sl2vl64.sl8[jj] = ((struct ib_smp *)mad)->data[jj]; 321 pr_debug("port %u, sl2vl[%d] = %02x\n", 322 port_num, jj, sl2vl64.sl8[jj]); 323 } 324 atomic64_set(&dev->sl2vl[port_num - 1], sl2vl64.sl64); 325 } 326 break; 327 328 default: 329 break; 330 } 331 } 332 333 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num, 334 int block, u32 change_bitmap) 335 { 336 int i, ix, slave, err; 337 int have_event = 0; 338 339 for (slave = 0; slave < dev->dev->caps.sqp_demux; slave++) { 340 if (slave == mlx4_master_func_num(dev->dev)) 341 continue; 342 if (!mlx4_is_slave_active(dev->dev, slave)) 343 continue; 344 345 have_event = 0; 346 for (i = 0; i < 32; i++) { 347 if (!(change_bitmap & (1 << i))) 348 continue; 349 for (ix = 0; 350 ix < dev->dev->caps.pkey_table_len[port_num]; ix++) { 351 if (dev->pkeys.virt2phys_pkey[slave][port_num - 1] 352 [ix] == i + 32 * block) { 353 err = mlx4_gen_pkey_eqe(dev->dev, slave, port_num); 354 pr_debug("propagate_pkey_ev: slave %d," 355 " port %d, ix %d (%d)\n", 356 slave, port_num, ix, err); 357 have_event = 1; 358 break; 359 } 360 } 361 if (have_event) 362 break; 363 } 364 } 365 } 366 367 static void node_desc_override(struct ib_device *dev, 368 struct ib_mad *mad) 369 { 370 unsigned long flags; 371 372 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 373 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 374 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && 375 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { 376 spin_lock_irqsave(&to_mdev(dev)->sm_lock, flags); 377 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 378 IB_DEVICE_NODE_DESC_MAX); 379 spin_unlock_irqrestore(&to_mdev(dev)->sm_lock, flags); 380 } 381 } 382 383 static void forward_trap(struct mlx4_ib_dev *dev, u32 port_num, 384 const struct ib_mad *mad) 385 { 386 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; 387 struct ib_mad_send_buf *send_buf; 388 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; 389 int ret; 390 unsigned long flags; 391 392 if (agent) { 393 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, 394 IB_MGMT_MAD_DATA, GFP_ATOMIC, 395 IB_MGMT_BASE_VERSION); 396 if (IS_ERR(send_buf)) 397 return; 398 /* 399 * We rely here on the fact that MLX QPs don't use the 400 * address handle after the send is posted (this is 401 * wrong following the IB spec strictly, but we know 402 * it's OK for our devices). 403 */ 404 spin_lock_irqsave(&dev->sm_lock, flags); 405 memcpy(send_buf->mad, mad, sizeof *mad); 406 if ((send_buf->ah = dev->sm_ah[port_num - 1])) 407 ret = ib_post_send_mad(send_buf, NULL); 408 else 409 ret = -EINVAL; 410 spin_unlock_irqrestore(&dev->sm_lock, flags); 411 412 if (ret) 413 ib_free_send_mad(send_buf); 414 } 415 } 416 417 static int mlx4_ib_demux_sa_handler(struct ib_device *ibdev, int port, int slave, 418 struct ib_sa_mad *sa_mad) 419 { 420 int ret = 0; 421 422 /* dispatch to different sa handlers */ 423 switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) { 424 case IB_SA_ATTR_MC_MEMBER_REC: 425 ret = mlx4_ib_mcg_demux_handler(ibdev, port, slave, sa_mad); 426 break; 427 default: 428 break; 429 } 430 return ret; 431 } 432 433 int mlx4_ib_find_real_gid(struct ib_device *ibdev, u32 port, __be64 guid) 434 { 435 struct mlx4_ib_dev *dev = to_mdev(ibdev); 436 int i; 437 438 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 439 if (dev->sriov.demux[port - 1].guid_cache[i] == guid) 440 return i; 441 } 442 return -1; 443 } 444 445 446 static int find_slave_port_pkey_ix(struct mlx4_ib_dev *dev, int slave, 447 u32 port, u16 pkey, u16 *ix) 448 { 449 int i, ret; 450 u8 unassigned_pkey_ix, pkey_ix, partial_ix = 0xFF; 451 u16 slot_pkey; 452 453 if (slave == mlx4_master_func_num(dev->dev)) 454 return ib_find_cached_pkey(&dev->ib_dev, port, pkey, ix); 455 456 unassigned_pkey_ix = dev->dev->phys_caps.pkey_phys_table_len[port] - 1; 457 458 for (i = 0; i < dev->dev->caps.pkey_table_len[port]; i++) { 459 if (dev->pkeys.virt2phys_pkey[slave][port - 1][i] == unassigned_pkey_ix) 460 continue; 461 462 pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][i]; 463 464 ret = ib_get_cached_pkey(&dev->ib_dev, port, pkey_ix, &slot_pkey); 465 if (ret) 466 continue; 467 if ((slot_pkey & 0x7FFF) == (pkey & 0x7FFF)) { 468 if (slot_pkey & 0x8000) { 469 *ix = (u16) pkey_ix; 470 return 0; 471 } else { 472 /* take first partial pkey index found */ 473 if (partial_ix == 0xFF) 474 partial_ix = pkey_ix; 475 } 476 } 477 } 478 479 if (partial_ix < 0xFF) { 480 *ix = (u16) partial_ix; 481 return 0; 482 } 483 484 return -EINVAL; 485 } 486 487 static int get_gids_from_l3_hdr(struct ib_grh *grh, union ib_gid *sgid, 488 union ib_gid *dgid) 489 { 490 int version = ib_get_rdma_header_version((const union rdma_network_hdr *)grh); 491 enum rdma_network_type net_type; 492 493 if (version == 4) 494 net_type = RDMA_NETWORK_IPV4; 495 else if (version == 6) 496 net_type = RDMA_NETWORK_IPV6; 497 else 498 return -EINVAL; 499 500 return ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type, 501 sgid, dgid); 502 } 503 504 static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave) 505 { 506 int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave; 507 508 return (qpn >= proxy_start && qpn <= proxy_start + 1); 509 } 510 511 int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u32 port, 512 enum ib_qp_type dest_qpt, struct ib_wc *wc, 513 struct ib_grh *grh, struct ib_mad *mad) 514 { 515 struct ib_sge list; 516 struct ib_ud_wr wr; 517 const struct ib_send_wr *bad_wr; 518 struct mlx4_ib_demux_pv_ctx *tun_ctx; 519 struct mlx4_ib_demux_pv_qp *tun_qp; 520 struct mlx4_rcv_tunnel_mad *tun_mad; 521 struct rdma_ah_attr attr; 522 struct ib_ah *ah; 523 struct ib_qp *src_qp = NULL; 524 unsigned tun_tx_ix = 0; 525 int dqpn; 526 int ret = 0; 527 u16 tun_pkey_ix; 528 u16 cached_pkey; 529 u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH; 530 531 if (dest_qpt > IB_QPT_GSI) { 532 pr_debug("dest_qpt (%d) > IB_QPT_GSI\n", dest_qpt); 533 return -EINVAL; 534 } 535 536 tun_ctx = dev->sriov.demux[port-1].tun[slave]; 537 538 /* check if proxy qp created */ 539 if (!tun_ctx || tun_ctx->state != DEMUX_PV_STATE_ACTIVE) 540 return -EAGAIN; 541 542 if (!dest_qpt) 543 tun_qp = &tun_ctx->qp[0]; 544 else 545 tun_qp = &tun_ctx->qp[1]; 546 547 /* compute P_Key index to put in tunnel header for slave */ 548 if (dest_qpt) { 549 u16 pkey_ix; 550 ret = ib_get_cached_pkey(&dev->ib_dev, port, wc->pkey_index, &cached_pkey); 551 if (ret) { 552 pr_debug("unable to get %s cached pkey for index %d, ret %d\n", 553 is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI", 554 wc->pkey_index, ret); 555 return -EINVAL; 556 } 557 558 ret = find_slave_port_pkey_ix(dev, slave, port, cached_pkey, &pkey_ix); 559 if (ret) { 560 pr_debug("unable to get %s pkey ix for pkey 0x%x, ret %d\n", 561 is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI", 562 cached_pkey, ret); 563 return -EINVAL; 564 } 565 tun_pkey_ix = pkey_ix; 566 } else 567 tun_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0]; 568 569 dqpn = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave + port + (dest_qpt * 2) - 1; 570 571 /* get tunnel tx data buf for slave */ 572 src_qp = tun_qp->qp; 573 574 /* create ah. Just need an empty one with the port num for the post send. 575 * The driver will set the force loopback bit in post_send */ 576 memset(&attr, 0, sizeof attr); 577 attr.type = rdma_ah_find_type(&dev->ib_dev, port); 578 579 rdma_ah_set_port_num(&attr, port); 580 if (is_eth) { 581 union ib_gid sgid; 582 union ib_gid dgid; 583 584 if (get_gids_from_l3_hdr(grh, &sgid, &dgid)) 585 return -EINVAL; 586 rdma_ah_set_grh(&attr, &dgid, 0, 0, 0, 0); 587 } 588 ah = rdma_create_ah(tun_ctx->pd, &attr, 0); 589 if (IS_ERR(ah)) 590 return -ENOMEM; 591 592 /* allocate tunnel tx buf after pass failure returns */ 593 spin_lock(&tun_qp->tx_lock); 594 if (tun_qp->tx_ix_head - tun_qp->tx_ix_tail >= 595 (MLX4_NUM_TUNNEL_BUFS - 1)) 596 ret = -EAGAIN; 597 else 598 tun_tx_ix = (++tun_qp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1); 599 spin_unlock(&tun_qp->tx_lock); 600 if (ret) 601 goto end; 602 603 tun_mad = (struct mlx4_rcv_tunnel_mad *) (tun_qp->tx_ring[tun_tx_ix].buf.addr); 604 if (tun_qp->tx_ring[tun_tx_ix].ah) 605 rdma_destroy_ah(tun_qp->tx_ring[tun_tx_ix].ah, 0); 606 tun_qp->tx_ring[tun_tx_ix].ah = ah; 607 ib_dma_sync_single_for_cpu(&dev->ib_dev, 608 tun_qp->tx_ring[tun_tx_ix].buf.map, 609 sizeof (struct mlx4_rcv_tunnel_mad), 610 DMA_TO_DEVICE); 611 612 /* copy over to tunnel buffer */ 613 if (grh) 614 memcpy(&tun_mad->grh, grh, sizeof *grh); 615 memcpy(&tun_mad->mad, mad, sizeof *mad); 616 617 /* adjust tunnel data */ 618 tun_mad->hdr.pkey_index = cpu_to_be16(tun_pkey_ix); 619 tun_mad->hdr.flags_src_qp = cpu_to_be32(wc->src_qp & 0xFFFFFF); 620 tun_mad->hdr.g_ml_path = (grh && (wc->wc_flags & IB_WC_GRH)) ? 0x80 : 0; 621 622 if (is_eth) { 623 u16 vlan = 0; 624 if (mlx4_get_slave_default_vlan(dev->dev, port, slave, &vlan, 625 NULL)) { 626 /* VST mode */ 627 if (vlan != wc->vlan_id) 628 /* Packet vlan is not the VST-assigned vlan. 629 * Drop the packet. 630 */ 631 goto out; 632 else 633 /* Remove the vlan tag before forwarding 634 * the packet to the VF. 635 */ 636 vlan = 0xffff; 637 } else { 638 vlan = wc->vlan_id; 639 } 640 641 tun_mad->hdr.sl_vid = cpu_to_be16(vlan); 642 memcpy((char *)&tun_mad->hdr.mac_31_0, &(wc->smac[0]), 4); 643 memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2); 644 } else { 645 tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12); 646 tun_mad->hdr.slid_mac_47_32 = ib_lid_be16(wc->slid); 647 } 648 649 ib_dma_sync_single_for_device(&dev->ib_dev, 650 tun_qp->tx_ring[tun_tx_ix].buf.map, 651 sizeof (struct mlx4_rcv_tunnel_mad), 652 DMA_TO_DEVICE); 653 654 list.addr = tun_qp->tx_ring[tun_tx_ix].buf.map; 655 list.length = sizeof (struct mlx4_rcv_tunnel_mad); 656 list.lkey = tun_ctx->pd->local_dma_lkey; 657 658 wr.ah = ah; 659 wr.port_num = port; 660 wr.remote_qkey = IB_QP_SET_QKEY; 661 wr.remote_qpn = dqpn; 662 wr.wr.next = NULL; 663 wr.wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt); 664 wr.wr.sg_list = &list; 665 wr.wr.num_sge = 1; 666 wr.wr.opcode = IB_WR_SEND; 667 wr.wr.send_flags = IB_SEND_SIGNALED; 668 669 ret = ib_post_send(src_qp, &wr.wr, &bad_wr); 670 if (!ret) 671 return 0; 672 out: 673 spin_lock(&tun_qp->tx_lock); 674 tun_qp->tx_ix_tail++; 675 spin_unlock(&tun_qp->tx_lock); 676 tun_qp->tx_ring[tun_tx_ix].ah = NULL; 677 end: 678 rdma_destroy_ah(ah, 0); 679 return ret; 680 } 681 682 static int mlx4_ib_demux_mad(struct ib_device *ibdev, u32 port, 683 struct ib_wc *wc, struct ib_grh *grh, 684 struct ib_mad *mad) 685 { 686 struct mlx4_ib_dev *dev = to_mdev(ibdev); 687 int err, other_port; 688 int slave = -1; 689 u8 *slave_id; 690 int is_eth = 0; 691 692 if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND) 693 is_eth = 0; 694 else 695 is_eth = 1; 696 697 if (is_eth) { 698 union ib_gid dgid; 699 union ib_gid sgid; 700 701 if (get_gids_from_l3_hdr(grh, &sgid, &dgid)) 702 return -EINVAL; 703 if (!(wc->wc_flags & IB_WC_GRH)) { 704 mlx4_ib_warn(ibdev, "RoCE grh not present.\n"); 705 return -EINVAL; 706 } 707 if (mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_CM) { 708 mlx4_ib_warn(ibdev, "RoCE mgmt class is not CM\n"); 709 return -EINVAL; 710 } 711 err = mlx4_get_slave_from_roce_gid(dev->dev, port, dgid.raw, &slave); 712 if (err && mlx4_is_mf_bonded(dev->dev)) { 713 other_port = (port == 1) ? 2 : 1; 714 err = mlx4_get_slave_from_roce_gid(dev->dev, other_port, dgid.raw, &slave); 715 if (!err) { 716 port = other_port; 717 pr_debug("resolved slave %d from gid %pI6 wire port %d other %d\n", 718 slave, grh->dgid.raw, port, other_port); 719 } 720 } 721 if (err) { 722 mlx4_ib_warn(ibdev, "failed matching grh\n"); 723 return -ENOENT; 724 } 725 if (slave >= dev->dev->caps.sqp_demux) { 726 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n", 727 slave, dev->dev->caps.sqp_demux); 728 return -ENOENT; 729 } 730 731 if (mlx4_ib_demux_cm_handler(ibdev, port, NULL, mad)) 732 return 0; 733 734 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad); 735 if (err) 736 pr_debug("failed sending %s to slave %d via tunnel qp (%d)\n", 737 is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI", 738 slave, err); 739 return 0; 740 } 741 742 /* Initially assume that this mad is for us */ 743 slave = mlx4_master_func_num(dev->dev); 744 745 /* See if the slave id is encoded in a response mad */ 746 if (mad->mad_hdr.method & 0x80) { 747 slave_id = (u8 *) &mad->mad_hdr.tid; 748 slave = *slave_id; 749 if (slave != 255) /*255 indicates the dom0*/ 750 *slave_id = 0; /* remap tid */ 751 } 752 753 /* If a grh is present, we demux according to it */ 754 if (wc->wc_flags & IB_WC_GRH) { 755 if (grh->dgid.global.interface_id == 756 cpu_to_be64(IB_SA_WELL_KNOWN_GUID) && 757 grh->dgid.global.subnet_prefix == cpu_to_be64( 758 atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix))) { 759 slave = 0; 760 } else { 761 slave = mlx4_ib_find_real_gid(ibdev, port, 762 grh->dgid.global.interface_id); 763 if (slave < 0) { 764 mlx4_ib_warn(ibdev, "failed matching grh\n"); 765 return -ENOENT; 766 } 767 } 768 } 769 /* Class-specific handling */ 770 switch (mad->mad_hdr.mgmt_class) { 771 case IB_MGMT_CLASS_SUBN_LID_ROUTED: 772 case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE: 773 /* 255 indicates the dom0 */ 774 if (slave != 255 && slave != mlx4_master_func_num(dev->dev)) { 775 if (!mlx4_vf_smi_enabled(dev->dev, slave, port)) 776 return -EPERM; 777 /* for a VF. drop unsolicited MADs */ 778 if (!(mad->mad_hdr.method & IB_MGMT_METHOD_RESP)) { 779 mlx4_ib_warn(ibdev, "demux QP0. rejecting unsolicited mad for slave %d class 0x%x, method 0x%x\n", 780 slave, mad->mad_hdr.mgmt_class, 781 mad->mad_hdr.method); 782 return -EINVAL; 783 } 784 } 785 break; 786 case IB_MGMT_CLASS_SUBN_ADM: 787 if (mlx4_ib_demux_sa_handler(ibdev, port, slave, 788 (struct ib_sa_mad *) mad)) 789 return 0; 790 break; 791 case IB_MGMT_CLASS_CM: 792 if (mlx4_ib_demux_cm_handler(ibdev, port, &slave, mad)) 793 return 0; 794 break; 795 case IB_MGMT_CLASS_DEVICE_MGMT: 796 if (mad->mad_hdr.method != IB_MGMT_METHOD_GET_RESP) 797 return 0; 798 break; 799 default: 800 /* Drop unsupported classes for slaves in tunnel mode */ 801 if (slave != mlx4_master_func_num(dev->dev)) { 802 pr_debug("dropping unsupported ingress mad from class:%d " 803 "for slave:%d\n", mad->mad_hdr.mgmt_class, slave); 804 return 0; 805 } 806 } 807 /*make sure that no slave==255 was not handled yet.*/ 808 if (slave >= dev->dev->caps.sqp_demux) { 809 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n", 810 slave, dev->dev->caps.sqp_demux); 811 return -ENOENT; 812 } 813 814 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad); 815 if (err) 816 pr_debug("failed sending %s to slave %d via tunnel qp (%d)\n", 817 is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI", 818 slave, err); 819 return 0; 820 } 821 822 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u32 port_num, 823 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 824 const struct ib_mad *in_mad, struct ib_mad *out_mad) 825 { 826 u16 slid, prev_lid = 0; 827 int err; 828 struct ib_port_attr pattr; 829 830 slid = in_wc ? ib_lid_cpu16(in_wc->slid) : be16_to_cpu(IB_LID_PERMISSIVE); 831 832 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { 833 forward_trap(to_mdev(ibdev), port_num, in_mad); 834 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 835 } 836 837 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 838 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 839 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 840 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && 841 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) 842 return IB_MAD_RESULT_SUCCESS; 843 844 /* 845 * Don't process SMInfo queries -- the SMA can't handle them. 846 */ 847 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO) 848 return IB_MAD_RESULT_SUCCESS; 849 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || 850 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 || 851 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 || 852 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { 853 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 854 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) 855 return IB_MAD_RESULT_SUCCESS; 856 } else 857 return IB_MAD_RESULT_SUCCESS; 858 859 if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 860 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 861 in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && 862 in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && 863 !ib_query_port(ibdev, port_num, &pattr)) 864 prev_lid = ib_lid_cpu16(pattr.lid); 865 866 err = mlx4_MAD_IFC(to_mdev(ibdev), 867 (mad_flags & IB_MAD_IGNORE_MKEY ? MLX4_MAD_IFC_IGNORE_MKEY : 0) | 868 (mad_flags & IB_MAD_IGNORE_BKEY ? MLX4_MAD_IFC_IGNORE_BKEY : 0) | 869 MLX4_MAD_IFC_NET_VIEW, 870 port_num, in_wc, in_grh, in_mad, out_mad); 871 if (err) 872 return IB_MAD_RESULT_FAILURE; 873 874 if (!out_mad->mad_hdr.status) { 875 smp_snoop(ibdev, port_num, in_mad, prev_lid); 876 /* slaves get node desc from FW */ 877 if (!mlx4_is_slave(to_mdev(ibdev)->dev)) 878 node_desc_override(ibdev, out_mad); 879 } 880 881 /* set return bit in status of directed route responses */ 882 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 883 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); 884 885 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) 886 /* no response for trap repress */ 887 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 888 889 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 890 } 891 892 static void edit_counter(struct mlx4_counter *cnt, void *counters, 893 __be16 attr_id) 894 { 895 switch (attr_id) { 896 case IB_PMA_PORT_COUNTERS: 897 { 898 struct ib_pma_portcounters *pma_cnt = 899 (struct ib_pma_portcounters *)counters; 900 901 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_data, 902 (be64_to_cpu(cnt->tx_bytes) >> 2)); 903 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_data, 904 (be64_to_cpu(cnt->rx_bytes) >> 2)); 905 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_packets, 906 be64_to_cpu(cnt->tx_frames)); 907 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_packets, 908 be64_to_cpu(cnt->rx_frames)); 909 break; 910 } 911 case IB_PMA_PORT_COUNTERS_EXT: 912 { 913 struct ib_pma_portcounters_ext *pma_cnt_ext = 914 (struct ib_pma_portcounters_ext *)counters; 915 916 pma_cnt_ext->port_xmit_data = 917 cpu_to_be64(be64_to_cpu(cnt->tx_bytes) >> 2); 918 pma_cnt_ext->port_rcv_data = 919 cpu_to_be64(be64_to_cpu(cnt->rx_bytes) >> 2); 920 pma_cnt_ext->port_xmit_packets = cnt->tx_frames; 921 pma_cnt_ext->port_rcv_packets = cnt->rx_frames; 922 break; 923 } 924 } 925 } 926 927 static int iboe_process_mad_port_info(void *out_mad) 928 { 929 struct ib_class_port_info cpi = {}; 930 931 cpi.capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH; 932 memcpy(out_mad, &cpi, sizeof(cpi)); 933 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 934 } 935 936 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, 937 u32 port_num, const struct ib_wc *in_wc, 938 const struct ib_grh *in_grh, 939 const struct ib_mad *in_mad, struct ib_mad *out_mad) 940 { 941 struct mlx4_counter counter_stats; 942 struct mlx4_ib_dev *dev = to_mdev(ibdev); 943 struct counter_index *tmp_counter; 944 int err = IB_MAD_RESULT_FAILURE, stats_avail = 0; 945 946 if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT) 947 return -EINVAL; 948 949 if (in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO) 950 return iboe_process_mad_port_info((void *)(out_mad->data + 40)); 951 952 memset(&counter_stats, 0, sizeof(counter_stats)); 953 mutex_lock(&dev->counters_table[port_num - 1].mutex); 954 list_for_each_entry(tmp_counter, 955 &dev->counters_table[port_num - 1].counters_list, 956 list) { 957 err = mlx4_get_counter_stats(dev->dev, 958 tmp_counter->index, 959 &counter_stats, 0); 960 if (err) { 961 err = IB_MAD_RESULT_FAILURE; 962 stats_avail = 0; 963 break; 964 } 965 stats_avail = 1; 966 } 967 mutex_unlock(&dev->counters_table[port_num - 1].mutex); 968 if (stats_avail) { 969 switch (counter_stats.counter_mode & 0xf) { 970 case 0: 971 edit_counter(&counter_stats, 972 (void *)(out_mad->data + 40), 973 in_mad->mad_hdr.attr_id); 974 err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 975 break; 976 default: 977 err = IB_MAD_RESULT_FAILURE; 978 } 979 } 980 981 return err; 982 } 983 984 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u32 port_num, 985 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 986 const struct ib_mad *in, struct ib_mad *out, 987 size_t *out_mad_size, u16 *out_mad_pkey_index) 988 { 989 struct mlx4_ib_dev *dev = to_mdev(ibdev); 990 enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num); 991 992 /* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA 993 * queries, should be called only by VFs and for that specific purpose 994 */ 995 if (link == IB_LINK_LAYER_INFINIBAND) { 996 if (mlx4_is_slave(dev->dev) && 997 (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT && 998 (in->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS || 999 in->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT || 1000 in->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO))) 1001 return iboe_process_mad(ibdev, mad_flags, port_num, 1002 in_wc, in_grh, in, out); 1003 1004 return ib_process_mad(ibdev, mad_flags, port_num, in_wc, in_grh, 1005 in, out); 1006 } 1007 1008 if (link == IB_LINK_LAYER_ETHERNET) 1009 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, 1010 in_grh, in, out); 1011 1012 return -EINVAL; 1013 } 1014 1015 static void send_handler(struct ib_mad_agent *agent, 1016 struct ib_mad_send_wc *mad_send_wc) 1017 { 1018 if (mad_send_wc->send_buf->context[0]) 1019 rdma_destroy_ah(mad_send_wc->send_buf->context[0], 0); 1020 ib_free_send_mad(mad_send_wc->send_buf); 1021 } 1022 1023 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev) 1024 { 1025 struct ib_mad_agent *agent; 1026 int p, q; 1027 int ret; 1028 enum rdma_link_layer ll; 1029 1030 for (p = 0; p < dev->num_ports; ++p) { 1031 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1); 1032 for (q = 0; q <= 1; ++q) { 1033 if (ll == IB_LINK_LAYER_INFINIBAND) { 1034 agent = ib_register_mad_agent(&dev->ib_dev, p + 1, 1035 q ? IB_QPT_GSI : IB_QPT_SMI, 1036 NULL, 0, send_handler, 1037 NULL, NULL, 0); 1038 if (IS_ERR(agent)) { 1039 ret = PTR_ERR(agent); 1040 goto err; 1041 } 1042 dev->send_agent[p][q] = agent; 1043 } else 1044 dev->send_agent[p][q] = NULL; 1045 } 1046 } 1047 1048 return 0; 1049 1050 err: 1051 for (p = 0; p < dev->num_ports; ++p) 1052 for (q = 0; q <= 1; ++q) 1053 if (dev->send_agent[p][q]) 1054 ib_unregister_mad_agent(dev->send_agent[p][q]); 1055 1056 return ret; 1057 } 1058 1059 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) 1060 { 1061 struct ib_mad_agent *agent; 1062 int p, q; 1063 1064 for (p = 0; p < dev->num_ports; ++p) { 1065 for (q = 0; q <= 1; ++q) { 1066 agent = dev->send_agent[p][q]; 1067 if (agent) { 1068 dev->send_agent[p][q] = NULL; 1069 ib_unregister_mad_agent(agent); 1070 } 1071 } 1072 1073 if (dev->sm_ah[p]) 1074 rdma_destroy_ah(dev->sm_ah[p], 0); 1075 } 1076 } 1077 1078 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u32 port_num) 1079 { 1080 mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_LID_CHANGE); 1081 1082 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down) 1083 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num, 1084 MLX4_EQ_PORT_INFO_LID_CHANGE_MASK); 1085 } 1086 1087 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u32 port_num) 1088 { 1089 /* re-configure the alias-guid and mcg's */ 1090 if (mlx4_is_master(dev->dev)) { 1091 mlx4_ib_invalidate_all_guid_record(dev, port_num); 1092 1093 if (!dev->sriov.is_going_down) { 1094 mlx4_ib_mcg_port_cleanup(&dev->sriov.demux[port_num - 1], 0); 1095 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num, 1096 MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK); 1097 } 1098 } 1099 1100 /* Update the sl to vl table from inside client rereg 1101 * only if in secure-host mode (snooping is not possible) 1102 * and the sl-to-vl change event is not generated by FW. 1103 */ 1104 if (!mlx4_is_slave(dev->dev) && 1105 dev->dev->flags & MLX4_FLAG_SECURE_HOST && 1106 !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)) { 1107 if (mlx4_is_master(dev->dev)) 1108 /* already in work queue from mlx4_ib_event queueing 1109 * mlx4_handle_port_mgmt_change_event, which calls 1110 * this procedure. Therefore, call sl2vl_update directly. 1111 */ 1112 mlx4_ib_sl2vl_update(dev, port_num); 1113 else 1114 mlx4_sched_ib_sl2vl_update_work(dev, port_num); 1115 } 1116 mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_CLIENT_REREGISTER); 1117 } 1118 1119 static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num, 1120 struct mlx4_eqe *eqe) 1121 { 1122 __propagate_pkey_ev(dev, port_num, GET_BLK_PTR_FROM_EQE(eqe), 1123 GET_MASK_FROM_EQE(eqe)); 1124 } 1125 1126 static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u32 port_num, 1127 u32 guid_tbl_blk_num, u32 change_bitmap) 1128 { 1129 struct ib_smp *in_mad = NULL; 1130 struct ib_smp *out_mad = NULL; 1131 u16 i; 1132 1133 if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev)) 1134 return; 1135 1136 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL); 1137 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 1138 if (!in_mad || !out_mad) 1139 goto out; 1140 1141 guid_tbl_blk_num *= 4; 1142 1143 for (i = 0; i < 4; i++) { 1144 if (change_bitmap && (!((change_bitmap >> (8 * i)) & 0xff))) 1145 continue; 1146 memset(in_mad, 0, sizeof *in_mad); 1147 memset(out_mad, 0, sizeof *out_mad); 1148 1149 in_mad->base_version = 1; 1150 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED; 1151 in_mad->class_version = 1; 1152 in_mad->method = IB_MGMT_METHOD_GET; 1153 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO; 1154 in_mad->attr_mod = cpu_to_be32(guid_tbl_blk_num + i); 1155 1156 if (mlx4_MAD_IFC(dev, 1157 MLX4_MAD_IFC_IGNORE_KEYS | MLX4_MAD_IFC_NET_VIEW, 1158 port_num, NULL, NULL, in_mad, out_mad)) { 1159 mlx4_ib_warn(&dev->ib_dev, "Failed in get GUID INFO MAD_IFC\n"); 1160 goto out; 1161 } 1162 1163 mlx4_ib_update_cache_on_guid_change(dev, guid_tbl_blk_num + i, 1164 port_num, 1165 (u8 *)(&((struct ib_smp *)out_mad)->data)); 1166 mlx4_ib_notify_slaves_on_guid_change(dev, guid_tbl_blk_num + i, 1167 port_num, 1168 (u8 *)(&((struct ib_smp *)out_mad)->data)); 1169 } 1170 1171 out: 1172 kfree(in_mad); 1173 kfree(out_mad); 1174 return; 1175 } 1176 1177 void handle_port_mgmt_change_event(struct work_struct *work) 1178 { 1179 struct ib_event_work *ew = container_of(work, struct ib_event_work, work); 1180 struct mlx4_ib_dev *dev = ew->ib_dev; 1181 struct mlx4_eqe *eqe = &(ew->ib_eqe); 1182 u32 port = eqe->event.port_mgmt_change.port; 1183 u32 changed_attr; 1184 u32 tbl_block; 1185 u32 change_bitmap; 1186 1187 switch (eqe->subtype) { 1188 case MLX4_DEV_PMC_SUBTYPE_PORT_INFO: 1189 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr); 1190 1191 /* Update the SM ah - This should be done before handling 1192 the other changed attributes so that MADs can be sent to the SM */ 1193 if (changed_attr & MSTR_SM_CHANGE_MASK) { 1194 u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid); 1195 u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf; 1196 update_sm_ah(dev, port, lid, sl); 1197 } 1198 1199 /* Check if it is a lid change event */ 1200 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK) 1201 handle_lid_change_event(dev, port); 1202 1203 /* Generate GUID changed event */ 1204 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) { 1205 if (mlx4_is_master(dev->dev)) { 1206 union ib_gid gid; 1207 int err = 0; 1208 1209 if (!eqe->event.port_mgmt_change.params.port_info.gid_prefix) 1210 err = __mlx4_ib_query_gid(&dev->ib_dev, port, 0, &gid, 1); 1211 else 1212 gid.global.subnet_prefix = 1213 eqe->event.port_mgmt_change.params.port_info.gid_prefix; 1214 if (err) { 1215 pr_warn("Could not change QP1 subnet prefix for port %d: query_gid error (%d)\n", 1216 port, err); 1217 } else { 1218 pr_debug("Changing QP1 subnet prefix for port %d. old=0x%llx. new=0x%llx\n", 1219 port, 1220 (u64)atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix), 1221 be64_to_cpu(gid.global.subnet_prefix)); 1222 atomic64_set(&dev->sriov.demux[port - 1].subnet_prefix, 1223 be64_to_cpu(gid.global.subnet_prefix)); 1224 } 1225 } 1226 mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE); 1227 /*if master, notify all slaves*/ 1228 if (mlx4_is_master(dev->dev)) 1229 mlx4_gen_slaves_port_mgt_ev(dev->dev, port, 1230 MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK); 1231 } 1232 1233 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK) 1234 handle_client_rereg_event(dev, port); 1235 break; 1236 1237 case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE: 1238 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE); 1239 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down) 1240 propagate_pkey_ev(dev, port, eqe); 1241 break; 1242 case MLX4_DEV_PMC_SUBTYPE_GUID_INFO: 1243 /* paravirtualized master's guid is guid 0 -- does not change */ 1244 if (!mlx4_is_master(dev->dev)) 1245 mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE); 1246 /*if master, notify relevant slaves*/ 1247 else if (!dev->sriov.is_going_down) { 1248 tbl_block = GET_BLK_PTR_FROM_EQE(eqe); 1249 change_bitmap = GET_MASK_FROM_EQE(eqe); 1250 handle_slaves_guid_change(dev, port, tbl_block, change_bitmap); 1251 } 1252 break; 1253 1254 case MLX4_DEV_PMC_SUBTYPE_SL_TO_VL_MAP: 1255 /* cache sl to vl mapping changes for use in 1256 * filling QP1 LRH VL field when sending packets 1257 */ 1258 if (!mlx4_is_slave(dev->dev)) { 1259 union sl2vl_tbl_to_u64 sl2vl64; 1260 int jj; 1261 1262 for (jj = 0; jj < 8; jj++) { 1263 sl2vl64.sl8[jj] = 1264 eqe->event.port_mgmt_change.params.sl2vl_tbl_change_info.sl2vl_table[jj]; 1265 pr_debug("port %u, sl2vl[%d] = %02x\n", 1266 port, jj, sl2vl64.sl8[jj]); 1267 } 1268 atomic64_set(&dev->sl2vl[port - 1], sl2vl64.sl64); 1269 } 1270 break; 1271 default: 1272 pr_warn("Unsupported subtype 0x%x for " 1273 "Port Management Change event\n", eqe->subtype); 1274 } 1275 1276 kfree(ew); 1277 } 1278 1279 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u32 port_num, 1280 enum ib_event_type type) 1281 { 1282 struct ib_event event; 1283 1284 event.device = &dev->ib_dev; 1285 event.element.port_num = port_num; 1286 event.event = type; 1287 1288 ib_dispatch_event(&event); 1289 } 1290 1291 static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg) 1292 { 1293 unsigned long flags; 1294 struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context; 1295 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 1296 spin_lock_irqsave(&dev->sriov.going_down_lock, flags); 1297 if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE) 1298 queue_work(ctx->wq, &ctx->work); 1299 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags); 1300 } 1301 1302 static void mlx4_ib_wire_comp_handler(struct ib_cq *cq, void *arg) 1303 { 1304 unsigned long flags; 1305 struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context; 1306 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 1307 1308 spin_lock_irqsave(&dev->sriov.going_down_lock, flags); 1309 if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE) 1310 queue_work(ctx->wi_wq, &ctx->work); 1311 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags); 1312 } 1313 1314 static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx, 1315 struct mlx4_ib_demux_pv_qp *tun_qp, 1316 int index) 1317 { 1318 struct ib_sge sg_list; 1319 struct ib_recv_wr recv_wr; 1320 const struct ib_recv_wr *bad_recv_wr; 1321 int size; 1322 1323 size = (tun_qp->qp->qp_type == IB_QPT_UD) ? 1324 sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf); 1325 1326 sg_list.addr = tun_qp->ring[index].map; 1327 sg_list.length = size; 1328 sg_list.lkey = ctx->pd->local_dma_lkey; 1329 1330 recv_wr.next = NULL; 1331 recv_wr.sg_list = &sg_list; 1332 recv_wr.num_sge = 1; 1333 recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV | 1334 MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt); 1335 ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map, 1336 size, DMA_FROM_DEVICE); 1337 return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr); 1338 } 1339 1340 static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port, 1341 int slave, struct ib_sa_mad *sa_mad) 1342 { 1343 int ret = 0; 1344 1345 /* dispatch to different sa handlers */ 1346 switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) { 1347 case IB_SA_ATTR_MC_MEMBER_REC: 1348 ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad); 1349 break; 1350 default: 1351 break; 1352 } 1353 return ret; 1354 } 1355 1356 int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u32 port, 1357 enum ib_qp_type dest_qpt, u16 pkey_index, 1358 u32 remote_qpn, u32 qkey, struct rdma_ah_attr *attr, 1359 u8 *s_mac, u16 vlan_id, struct ib_mad *mad) 1360 { 1361 struct ib_sge list; 1362 struct ib_ud_wr wr; 1363 const struct ib_send_wr *bad_wr; 1364 struct mlx4_ib_demux_pv_ctx *sqp_ctx; 1365 struct mlx4_ib_demux_pv_qp *sqp; 1366 struct mlx4_mad_snd_buf *sqp_mad; 1367 struct ib_ah *ah; 1368 struct ib_qp *send_qp = NULL; 1369 unsigned wire_tx_ix = 0; 1370 u16 wire_pkey_ix; 1371 int src_qpnum; 1372 int ret; 1373 1374 sqp_ctx = dev->sriov.sqps[port-1]; 1375 1376 /* check if proxy qp created */ 1377 if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE) 1378 return -EAGAIN; 1379 1380 if (dest_qpt == IB_QPT_SMI) { 1381 src_qpnum = 0; 1382 sqp = &sqp_ctx->qp[0]; 1383 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0]; 1384 } else { 1385 src_qpnum = 1; 1386 sqp = &sqp_ctx->qp[1]; 1387 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index]; 1388 } 1389 1390 send_qp = sqp->qp; 1391 1392 ah = rdma_zalloc_drv_obj(sqp_ctx->pd->device, ib_ah); 1393 if (!ah) 1394 return -ENOMEM; 1395 1396 ah->device = sqp_ctx->pd->device; 1397 ah->pd = sqp_ctx->pd; 1398 1399 /* create ah */ 1400 ret = mlx4_ib_create_ah_slave(ah, attr, 1401 rdma_ah_retrieve_grh(attr)->sgid_index, 1402 s_mac, vlan_id); 1403 if (ret) 1404 goto out; 1405 1406 spin_lock(&sqp->tx_lock); 1407 if (sqp->tx_ix_head - sqp->tx_ix_tail >= 1408 (MLX4_NUM_WIRE_BUFS - 1)) 1409 ret = -EAGAIN; 1410 else 1411 wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_WIRE_BUFS - 1); 1412 spin_unlock(&sqp->tx_lock); 1413 if (ret) 1414 goto out; 1415 1416 sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr); 1417 kfree(sqp->tx_ring[wire_tx_ix].ah); 1418 sqp->tx_ring[wire_tx_ix].ah = ah; 1419 ib_dma_sync_single_for_cpu(&dev->ib_dev, 1420 sqp->tx_ring[wire_tx_ix].buf.map, 1421 sizeof (struct mlx4_mad_snd_buf), 1422 DMA_TO_DEVICE); 1423 1424 memcpy(&sqp_mad->payload, mad, sizeof *mad); 1425 1426 ib_dma_sync_single_for_device(&dev->ib_dev, 1427 sqp->tx_ring[wire_tx_ix].buf.map, 1428 sizeof (struct mlx4_mad_snd_buf), 1429 DMA_TO_DEVICE); 1430 1431 list.addr = sqp->tx_ring[wire_tx_ix].buf.map; 1432 list.length = sizeof (struct mlx4_mad_snd_buf); 1433 list.lkey = sqp_ctx->pd->local_dma_lkey; 1434 1435 wr.ah = ah; 1436 wr.port_num = port; 1437 wr.pkey_index = wire_pkey_ix; 1438 wr.remote_qkey = qkey; 1439 wr.remote_qpn = remote_qpn; 1440 wr.wr.next = NULL; 1441 wr.wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum); 1442 wr.wr.sg_list = &list; 1443 wr.wr.num_sge = 1; 1444 wr.wr.opcode = IB_WR_SEND; 1445 wr.wr.send_flags = IB_SEND_SIGNALED; 1446 1447 ret = ib_post_send(send_qp, &wr.wr, &bad_wr); 1448 if (!ret) 1449 return 0; 1450 1451 spin_lock(&sqp->tx_lock); 1452 sqp->tx_ix_tail++; 1453 spin_unlock(&sqp->tx_lock); 1454 sqp->tx_ring[wire_tx_ix].ah = NULL; 1455 out: 1456 kfree(ah); 1457 return ret; 1458 } 1459 1460 static int get_slave_base_gid_ix(struct mlx4_ib_dev *dev, int slave, int port) 1461 { 1462 if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND) 1463 return slave; 1464 return mlx4_get_base_gid_ix(dev->dev, slave, port); 1465 } 1466 1467 static void fill_in_real_sgid_index(struct mlx4_ib_dev *dev, int slave, int port, 1468 struct rdma_ah_attr *ah_attr) 1469 { 1470 struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr); 1471 if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND) 1472 grh->sgid_index = slave; 1473 else 1474 grh->sgid_index += get_slave_base_gid_ix(dev, slave, port); 1475 } 1476 1477 static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc) 1478 { 1479 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 1480 struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)]; 1481 int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1); 1482 struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr; 1483 struct mlx4_ib_ah ah; 1484 struct rdma_ah_attr ah_attr; 1485 u8 *slave_id; 1486 int slave; 1487 int port; 1488 u16 vlan_id; 1489 u8 qos; 1490 u8 *dmac; 1491 int sts; 1492 1493 /* Get slave that sent this packet */ 1494 if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn || 1495 wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX || 1496 (wc->src_qp & 0x1) != ctx->port - 1 || 1497 wc->src_qp & 0x4) { 1498 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp); 1499 return; 1500 } 1501 slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8; 1502 if (slave != ctx->slave) { 1503 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: " 1504 "belongs to another slave\n", wc->src_qp); 1505 return; 1506 } 1507 1508 /* Map transaction ID */ 1509 ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map, 1510 sizeof (struct mlx4_tunnel_mad), 1511 DMA_FROM_DEVICE); 1512 switch (tunnel->mad.mad_hdr.method) { 1513 case IB_MGMT_METHOD_SET: 1514 case IB_MGMT_METHOD_GET: 1515 case IB_MGMT_METHOD_REPORT: 1516 case IB_SA_METHOD_GET_TABLE: 1517 case IB_SA_METHOD_DELETE: 1518 case IB_SA_METHOD_GET_MULTI: 1519 case IB_SA_METHOD_GET_TRACE_TBL: 1520 slave_id = (u8 *) &tunnel->mad.mad_hdr.tid; 1521 if (*slave_id) { 1522 mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d " 1523 "class:%d slave:%d\n", *slave_id, 1524 tunnel->mad.mad_hdr.mgmt_class, slave); 1525 return; 1526 } else 1527 *slave_id = slave; 1528 break; 1529 default: 1530 /* nothing */; 1531 } 1532 1533 /* Class-specific handling */ 1534 switch (tunnel->mad.mad_hdr.mgmt_class) { 1535 case IB_MGMT_CLASS_SUBN_LID_ROUTED: 1536 case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE: 1537 if (slave != mlx4_master_func_num(dev->dev) && 1538 !mlx4_vf_smi_enabled(dev->dev, slave, ctx->port)) 1539 return; 1540 break; 1541 case IB_MGMT_CLASS_SUBN_ADM: 1542 if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave, 1543 (struct ib_sa_mad *) &tunnel->mad)) 1544 return; 1545 break; 1546 case IB_MGMT_CLASS_CM: 1547 if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave, 1548 (struct ib_mad *) &tunnel->mad)) 1549 return; 1550 break; 1551 case IB_MGMT_CLASS_DEVICE_MGMT: 1552 if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET && 1553 tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET) 1554 return; 1555 break; 1556 default: 1557 /* Drop unsupported classes for slaves in tunnel mode */ 1558 if (slave != mlx4_master_func_num(dev->dev)) { 1559 mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d " 1560 "for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave); 1561 return; 1562 } 1563 } 1564 1565 /* We are using standard ib_core services to send the mad, so generate a 1566 * stadard address handle by decoding the tunnelled mlx4_ah fields */ 1567 memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av)); 1568 ah.ibah.device = ctx->ib_dev; 1569 1570 port = be32_to_cpu(ah.av.ib.port_pd) >> 24; 1571 port = mlx4_slave_convert_port(dev->dev, slave, port); 1572 if (port < 0) 1573 return; 1574 ah.av.ib.port_pd = cpu_to_be32(port << 24 | (be32_to_cpu(ah.av.ib.port_pd) & 0xffffff)); 1575 ah.ibah.type = rdma_ah_find_type(&dev->ib_dev, port); 1576 1577 mlx4_ib_query_ah(&ah.ibah, &ah_attr); 1578 if (rdma_ah_get_ah_flags(&ah_attr) & IB_AH_GRH) 1579 fill_in_real_sgid_index(dev, slave, ctx->port, &ah_attr); 1580 dmac = rdma_ah_retrieve_dmac(&ah_attr); 1581 if (dmac) 1582 memcpy(dmac, tunnel->hdr.mac, ETH_ALEN); 1583 vlan_id = be16_to_cpu(tunnel->hdr.vlan); 1584 /* if slave have default vlan use it */ 1585 if (mlx4_get_slave_default_vlan(dev->dev, ctx->port, slave, 1586 &vlan_id, &qos)) 1587 rdma_ah_set_sl(&ah_attr, qos); 1588 1589 sts = mlx4_ib_send_to_wire(dev, slave, ctx->port, 1590 is_proxy_qp0(dev, wc->src_qp, slave) ? 1591 IB_QPT_SMI : IB_QPT_GSI, 1592 be16_to_cpu(tunnel->hdr.pkey_index), 1593 be32_to_cpu(tunnel->hdr.remote_qpn), 1594 be32_to_cpu(tunnel->hdr.qkey), 1595 &ah_attr, wc->smac, vlan_id, &tunnel->mad); 1596 if (sts) 1597 pr_debug("failed sending %s to wire on behalf of slave %d (%d)\n", 1598 is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI", 1599 slave, sts); 1600 } 1601 1602 static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx, 1603 enum ib_qp_type qp_type, int is_tun) 1604 { 1605 int i; 1606 struct mlx4_ib_demux_pv_qp *tun_qp; 1607 int rx_buf_size, tx_buf_size; 1608 const int nmbr_bufs = is_tun ? MLX4_NUM_TUNNEL_BUFS : MLX4_NUM_WIRE_BUFS; 1609 1610 if (qp_type > IB_QPT_GSI) 1611 return -EINVAL; 1612 1613 tun_qp = &ctx->qp[qp_type]; 1614 1615 tun_qp->ring = kcalloc(nmbr_bufs, 1616 sizeof(struct mlx4_ib_buf), 1617 GFP_KERNEL); 1618 if (!tun_qp->ring) 1619 return -ENOMEM; 1620 1621 tun_qp->tx_ring = kcalloc(nmbr_bufs, 1622 sizeof (struct mlx4_ib_tun_tx_buf), 1623 GFP_KERNEL); 1624 if (!tun_qp->tx_ring) { 1625 kfree(tun_qp->ring); 1626 tun_qp->ring = NULL; 1627 return -ENOMEM; 1628 } 1629 1630 if (is_tun) { 1631 rx_buf_size = sizeof (struct mlx4_tunnel_mad); 1632 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad); 1633 } else { 1634 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf); 1635 tx_buf_size = sizeof (struct mlx4_mad_snd_buf); 1636 } 1637 1638 for (i = 0; i < nmbr_bufs; i++) { 1639 tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL); 1640 if (!tun_qp->ring[i].addr) 1641 goto err; 1642 tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev, 1643 tun_qp->ring[i].addr, 1644 rx_buf_size, 1645 DMA_FROM_DEVICE); 1646 if (ib_dma_mapping_error(ctx->ib_dev, tun_qp->ring[i].map)) { 1647 kfree(tun_qp->ring[i].addr); 1648 goto err; 1649 } 1650 } 1651 1652 for (i = 0; i < nmbr_bufs; i++) { 1653 tun_qp->tx_ring[i].buf.addr = 1654 kmalloc(tx_buf_size, GFP_KERNEL); 1655 if (!tun_qp->tx_ring[i].buf.addr) 1656 goto tx_err; 1657 tun_qp->tx_ring[i].buf.map = 1658 ib_dma_map_single(ctx->ib_dev, 1659 tun_qp->tx_ring[i].buf.addr, 1660 tx_buf_size, 1661 DMA_TO_DEVICE); 1662 if (ib_dma_mapping_error(ctx->ib_dev, 1663 tun_qp->tx_ring[i].buf.map)) { 1664 kfree(tun_qp->tx_ring[i].buf.addr); 1665 goto tx_err; 1666 } 1667 tun_qp->tx_ring[i].ah = NULL; 1668 } 1669 spin_lock_init(&tun_qp->tx_lock); 1670 tun_qp->tx_ix_head = 0; 1671 tun_qp->tx_ix_tail = 0; 1672 tun_qp->proxy_qpt = qp_type; 1673 1674 return 0; 1675 1676 tx_err: 1677 while (i > 0) { 1678 --i; 1679 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map, 1680 tx_buf_size, DMA_TO_DEVICE); 1681 kfree(tun_qp->tx_ring[i].buf.addr); 1682 } 1683 i = nmbr_bufs; 1684 err: 1685 while (i > 0) { 1686 --i; 1687 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map, 1688 rx_buf_size, DMA_FROM_DEVICE); 1689 kfree(tun_qp->ring[i].addr); 1690 } 1691 kfree(tun_qp->tx_ring); 1692 tun_qp->tx_ring = NULL; 1693 kfree(tun_qp->ring); 1694 tun_qp->ring = NULL; 1695 return -ENOMEM; 1696 } 1697 1698 static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx, 1699 enum ib_qp_type qp_type, int is_tun) 1700 { 1701 int i; 1702 struct mlx4_ib_demux_pv_qp *tun_qp; 1703 int rx_buf_size, tx_buf_size; 1704 const int nmbr_bufs = is_tun ? MLX4_NUM_TUNNEL_BUFS : MLX4_NUM_WIRE_BUFS; 1705 1706 if (qp_type > IB_QPT_GSI) 1707 return; 1708 1709 tun_qp = &ctx->qp[qp_type]; 1710 if (is_tun) { 1711 rx_buf_size = sizeof (struct mlx4_tunnel_mad); 1712 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad); 1713 } else { 1714 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf); 1715 tx_buf_size = sizeof (struct mlx4_mad_snd_buf); 1716 } 1717 1718 1719 for (i = 0; i < nmbr_bufs; i++) { 1720 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map, 1721 rx_buf_size, DMA_FROM_DEVICE); 1722 kfree(tun_qp->ring[i].addr); 1723 } 1724 1725 for (i = 0; i < nmbr_bufs; i++) { 1726 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map, 1727 tx_buf_size, DMA_TO_DEVICE); 1728 kfree(tun_qp->tx_ring[i].buf.addr); 1729 if (tun_qp->tx_ring[i].ah) 1730 rdma_destroy_ah(tun_qp->tx_ring[i].ah, 0); 1731 } 1732 kfree(tun_qp->tx_ring); 1733 kfree(tun_qp->ring); 1734 } 1735 1736 static void mlx4_ib_tunnel_comp_worker(struct work_struct *work) 1737 { 1738 struct mlx4_ib_demux_pv_ctx *ctx; 1739 struct mlx4_ib_demux_pv_qp *tun_qp; 1740 struct ib_wc wc; 1741 int ret; 1742 ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work); 1743 ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); 1744 1745 while (ib_poll_cq(ctx->cq, 1, &wc) == 1) { 1746 tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)]; 1747 if (wc.status == IB_WC_SUCCESS) { 1748 switch (wc.opcode) { 1749 case IB_WC_RECV: 1750 mlx4_ib_multiplex_mad(ctx, &wc); 1751 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, 1752 wc.wr_id & 1753 (MLX4_NUM_TUNNEL_BUFS - 1)); 1754 if (ret) 1755 pr_err("Failed reposting tunnel " 1756 "buf:%lld\n", wc.wr_id); 1757 break; 1758 case IB_WC_SEND: 1759 rdma_destroy_ah(tun_qp->tx_ring[wc.wr_id & 1760 (MLX4_NUM_TUNNEL_BUFS - 1)].ah, 0); 1761 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1762 = NULL; 1763 spin_lock(&tun_qp->tx_lock); 1764 tun_qp->tx_ix_tail++; 1765 spin_unlock(&tun_qp->tx_lock); 1766 1767 break; 1768 default: 1769 break; 1770 } 1771 } else { 1772 pr_debug("mlx4_ib: completion error in tunnel: %d." 1773 " status = %d, wrid = 0x%llx\n", 1774 ctx->slave, wc.status, wc.wr_id); 1775 if (!MLX4_TUN_IS_RECV(wc.wr_id)) { 1776 rdma_destroy_ah(tun_qp->tx_ring[wc.wr_id & 1777 (MLX4_NUM_TUNNEL_BUFS - 1)].ah, 0); 1778 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1779 = NULL; 1780 spin_lock(&tun_qp->tx_lock); 1781 tun_qp->tx_ix_tail++; 1782 spin_unlock(&tun_qp->tx_lock); 1783 } 1784 } 1785 } 1786 } 1787 1788 static void pv_qp_event_handler(struct ib_event *event, void *qp_context) 1789 { 1790 struct mlx4_ib_demux_pv_ctx *sqp = qp_context; 1791 1792 /* It's worse than that! He's dead, Jim! */ 1793 pr_err("Fatal error (%d) on a MAD QP on port %d\n", 1794 event->event, sqp->port); 1795 } 1796 1797 static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx, 1798 enum ib_qp_type qp_type, int create_tun) 1799 { 1800 int i, ret; 1801 struct mlx4_ib_demux_pv_qp *tun_qp; 1802 struct mlx4_ib_qp_tunnel_init_attr qp_init_attr; 1803 struct ib_qp_attr attr; 1804 int qp_attr_mask_INIT; 1805 const int nmbr_bufs = create_tun ? MLX4_NUM_TUNNEL_BUFS : MLX4_NUM_WIRE_BUFS; 1806 1807 if (qp_type > IB_QPT_GSI) 1808 return -EINVAL; 1809 1810 tun_qp = &ctx->qp[qp_type]; 1811 1812 memset(&qp_init_attr, 0, sizeof qp_init_attr); 1813 qp_init_attr.init_attr.send_cq = ctx->cq; 1814 qp_init_attr.init_attr.recv_cq = ctx->cq; 1815 qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; 1816 qp_init_attr.init_attr.cap.max_send_wr = nmbr_bufs; 1817 qp_init_attr.init_attr.cap.max_recv_wr = nmbr_bufs; 1818 qp_init_attr.init_attr.cap.max_send_sge = 1; 1819 qp_init_attr.init_attr.cap.max_recv_sge = 1; 1820 if (create_tun) { 1821 qp_init_attr.init_attr.qp_type = IB_QPT_UD; 1822 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_TUNNEL_QP; 1823 qp_init_attr.port = ctx->port; 1824 qp_init_attr.slave = ctx->slave; 1825 qp_init_attr.proxy_qp_type = qp_type; 1826 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | 1827 IB_QP_QKEY | IB_QP_PORT; 1828 } else { 1829 qp_init_attr.init_attr.qp_type = qp_type; 1830 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_SQP; 1831 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY; 1832 } 1833 qp_init_attr.init_attr.port_num = ctx->port; 1834 qp_init_attr.init_attr.qp_context = ctx; 1835 qp_init_attr.init_attr.event_handler = pv_qp_event_handler; 1836 tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr); 1837 if (IS_ERR(tun_qp->qp)) { 1838 ret = PTR_ERR(tun_qp->qp); 1839 tun_qp->qp = NULL; 1840 pr_err("Couldn't create %s QP (%d)\n", 1841 create_tun ? "tunnel" : "special", ret); 1842 return ret; 1843 } 1844 1845 memset(&attr, 0, sizeof attr); 1846 attr.qp_state = IB_QPS_INIT; 1847 ret = 0; 1848 if (create_tun) 1849 ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave, 1850 ctx->port, IB_DEFAULT_PKEY_FULL, 1851 &attr.pkey_index); 1852 if (ret || !create_tun) 1853 attr.pkey_index = 1854 to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0]; 1855 attr.qkey = IB_QP1_QKEY; 1856 attr.port_num = ctx->port; 1857 ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT); 1858 if (ret) { 1859 pr_err("Couldn't change %s qp state to INIT (%d)\n", 1860 create_tun ? "tunnel" : "special", ret); 1861 goto err_qp; 1862 } 1863 attr.qp_state = IB_QPS_RTR; 1864 ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE); 1865 if (ret) { 1866 pr_err("Couldn't change %s qp state to RTR (%d)\n", 1867 create_tun ? "tunnel" : "special", ret); 1868 goto err_qp; 1869 } 1870 attr.qp_state = IB_QPS_RTS; 1871 attr.sq_psn = 0; 1872 ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN); 1873 if (ret) { 1874 pr_err("Couldn't change %s qp state to RTS (%d)\n", 1875 create_tun ? "tunnel" : "special", ret); 1876 goto err_qp; 1877 } 1878 1879 for (i = 0; i < nmbr_bufs; i++) { 1880 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i); 1881 if (ret) { 1882 pr_err(" mlx4_ib_post_pv_buf error" 1883 " (err = %d, i = %d)\n", ret, i); 1884 goto err_qp; 1885 } 1886 } 1887 return 0; 1888 1889 err_qp: 1890 ib_destroy_qp(tun_qp->qp); 1891 tun_qp->qp = NULL; 1892 return ret; 1893 } 1894 1895 /* 1896 * IB MAD completion callback for real SQPs 1897 */ 1898 static void mlx4_ib_sqp_comp_worker(struct work_struct *work) 1899 { 1900 struct mlx4_ib_demux_pv_ctx *ctx; 1901 struct mlx4_ib_demux_pv_qp *sqp; 1902 struct ib_wc wc; 1903 struct ib_grh *grh; 1904 struct ib_mad *mad; 1905 1906 ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work); 1907 ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); 1908 1909 while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) { 1910 sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)]; 1911 if (wc.status == IB_WC_SUCCESS) { 1912 switch (wc.opcode) { 1913 case IB_WC_SEND: 1914 kfree(sqp->tx_ring[wc.wr_id & 1915 (MLX4_NUM_WIRE_BUFS - 1)].ah); 1916 sqp->tx_ring[wc.wr_id & (MLX4_NUM_WIRE_BUFS - 1)].ah 1917 = NULL; 1918 spin_lock(&sqp->tx_lock); 1919 sqp->tx_ix_tail++; 1920 spin_unlock(&sqp->tx_lock); 1921 break; 1922 case IB_WC_RECV: 1923 mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *) 1924 (sqp->ring[wc.wr_id & 1925 (MLX4_NUM_WIRE_BUFS - 1)].addr))->payload); 1926 grh = &(((struct mlx4_mad_rcv_buf *) 1927 (sqp->ring[wc.wr_id & 1928 (MLX4_NUM_WIRE_BUFS - 1)].addr))->grh); 1929 mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad); 1930 if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id & 1931 (MLX4_NUM_WIRE_BUFS - 1))) 1932 pr_err("Failed reposting SQP " 1933 "buf:%lld\n", wc.wr_id); 1934 break; 1935 default: 1936 break; 1937 } 1938 } else { 1939 pr_debug("mlx4_ib: completion error in tunnel: %d." 1940 " status = %d, wrid = 0x%llx\n", 1941 ctx->slave, wc.status, wc.wr_id); 1942 if (!MLX4_TUN_IS_RECV(wc.wr_id)) { 1943 kfree(sqp->tx_ring[wc.wr_id & 1944 (MLX4_NUM_WIRE_BUFS - 1)].ah); 1945 sqp->tx_ring[wc.wr_id & (MLX4_NUM_WIRE_BUFS - 1)].ah 1946 = NULL; 1947 spin_lock(&sqp->tx_lock); 1948 sqp->tx_ix_tail++; 1949 spin_unlock(&sqp->tx_lock); 1950 } 1951 } 1952 } 1953 } 1954 1955 static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port, 1956 struct mlx4_ib_demux_pv_ctx **ret_ctx) 1957 { 1958 struct mlx4_ib_demux_pv_ctx *ctx; 1959 1960 *ret_ctx = NULL; 1961 ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL); 1962 if (!ctx) 1963 return -ENOMEM; 1964 1965 ctx->ib_dev = &dev->ib_dev; 1966 ctx->port = port; 1967 ctx->slave = slave; 1968 *ret_ctx = ctx; 1969 return 0; 1970 } 1971 1972 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port) 1973 { 1974 if (dev->sriov.demux[port - 1].tun[slave]) { 1975 kfree(dev->sriov.demux[port - 1].tun[slave]); 1976 dev->sriov.demux[port - 1].tun[slave] = NULL; 1977 } 1978 } 1979 1980 static int create_pv_resources(struct ib_device *ibdev, int slave, int port, 1981 int create_tun, struct mlx4_ib_demux_pv_ctx *ctx) 1982 { 1983 int ret, cq_size; 1984 struct ib_cq_init_attr cq_attr = {}; 1985 const int nmbr_bufs = create_tun ? MLX4_NUM_TUNNEL_BUFS : MLX4_NUM_WIRE_BUFS; 1986 1987 if (ctx->state != DEMUX_PV_STATE_DOWN) 1988 return -EEXIST; 1989 1990 ctx->state = DEMUX_PV_STATE_STARTING; 1991 /* have QP0 only if link layer is IB */ 1992 if (rdma_port_get_link_layer(ibdev, ctx->port) == 1993 IB_LINK_LAYER_INFINIBAND) 1994 ctx->has_smi = 1; 1995 1996 if (ctx->has_smi) { 1997 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun); 1998 if (ret) { 1999 pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret); 2000 goto err_out; 2001 } 2002 } 2003 2004 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun); 2005 if (ret) { 2006 pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret); 2007 goto err_out_qp0; 2008 } 2009 2010 cq_size = 2 * nmbr_bufs; 2011 if (ctx->has_smi) 2012 cq_size *= 2; 2013 2014 cq_attr.cqe = cq_size; 2015 ctx->cq = ib_create_cq(ctx->ib_dev, 2016 create_tun ? mlx4_ib_tunnel_comp_handler : mlx4_ib_wire_comp_handler, 2017 NULL, ctx, &cq_attr); 2018 if (IS_ERR(ctx->cq)) { 2019 ret = PTR_ERR(ctx->cq); 2020 pr_err("Couldn't create tunnel CQ (%d)\n", ret); 2021 goto err_buf; 2022 } 2023 2024 ctx->pd = ib_alloc_pd(ctx->ib_dev, 0); 2025 if (IS_ERR(ctx->pd)) { 2026 ret = PTR_ERR(ctx->pd); 2027 pr_err("Couldn't create tunnel PD (%d)\n", ret); 2028 goto err_cq; 2029 } 2030 2031 if (ctx->has_smi) { 2032 ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun); 2033 if (ret) { 2034 pr_err("Couldn't create %s QP0 (%d)\n", 2035 create_tun ? "tunnel for" : "", ret); 2036 goto err_pd; 2037 } 2038 } 2039 2040 ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun); 2041 if (ret) { 2042 pr_err("Couldn't create %s QP1 (%d)\n", 2043 create_tun ? "tunnel for" : "", ret); 2044 goto err_qp0; 2045 } 2046 2047 if (create_tun) 2048 INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker); 2049 else 2050 INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker); 2051 2052 ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq; 2053 ctx->wi_wq = to_mdev(ibdev)->sriov.demux[port - 1].wi_wq; 2054 2055 ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); 2056 if (ret) { 2057 pr_err("Couldn't arm tunnel cq (%d)\n", ret); 2058 goto err_wq; 2059 } 2060 ctx->state = DEMUX_PV_STATE_ACTIVE; 2061 return 0; 2062 2063 err_wq: 2064 ctx->wq = NULL; 2065 ib_destroy_qp(ctx->qp[1].qp); 2066 ctx->qp[1].qp = NULL; 2067 2068 2069 err_qp0: 2070 if (ctx->has_smi) 2071 ib_destroy_qp(ctx->qp[0].qp); 2072 ctx->qp[0].qp = NULL; 2073 2074 err_pd: 2075 ib_dealloc_pd(ctx->pd); 2076 ctx->pd = NULL; 2077 2078 err_cq: 2079 ib_destroy_cq(ctx->cq); 2080 ctx->cq = NULL; 2081 2082 err_buf: 2083 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun); 2084 2085 err_out_qp0: 2086 if (ctx->has_smi) 2087 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun); 2088 err_out: 2089 ctx->state = DEMUX_PV_STATE_DOWN; 2090 return ret; 2091 } 2092 2093 static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port, 2094 struct mlx4_ib_demux_pv_ctx *ctx, int flush) 2095 { 2096 if (!ctx) 2097 return; 2098 if (ctx->state > DEMUX_PV_STATE_DOWN) { 2099 ctx->state = DEMUX_PV_STATE_DOWNING; 2100 if (flush) 2101 flush_workqueue(ctx->wq); 2102 if (ctx->has_smi) { 2103 ib_destroy_qp(ctx->qp[0].qp); 2104 ctx->qp[0].qp = NULL; 2105 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1); 2106 } 2107 ib_destroy_qp(ctx->qp[1].qp); 2108 ctx->qp[1].qp = NULL; 2109 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1); 2110 ib_dealloc_pd(ctx->pd); 2111 ctx->pd = NULL; 2112 ib_destroy_cq(ctx->cq); 2113 ctx->cq = NULL; 2114 ctx->state = DEMUX_PV_STATE_DOWN; 2115 } 2116 } 2117 2118 static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave, 2119 int port, int do_init) 2120 { 2121 int ret = 0; 2122 2123 if (!do_init) { 2124 clean_vf_mcast(&dev->sriov.demux[port - 1], slave); 2125 /* for master, destroy real sqp resources */ 2126 if (slave == mlx4_master_func_num(dev->dev)) 2127 destroy_pv_resources(dev, slave, port, 2128 dev->sriov.sqps[port - 1], 1); 2129 /* destroy the tunnel qp resources */ 2130 destroy_pv_resources(dev, slave, port, 2131 dev->sriov.demux[port - 1].tun[slave], 1); 2132 return 0; 2133 } 2134 2135 /* create the tunnel qp resources */ 2136 ret = create_pv_resources(&dev->ib_dev, slave, port, 1, 2137 dev->sriov.demux[port - 1].tun[slave]); 2138 2139 /* for master, create the real sqp resources */ 2140 if (!ret && slave == mlx4_master_func_num(dev->dev)) 2141 ret = create_pv_resources(&dev->ib_dev, slave, port, 0, 2142 dev->sriov.sqps[port - 1]); 2143 return ret; 2144 } 2145 2146 void mlx4_ib_tunnels_update_work(struct work_struct *work) 2147 { 2148 struct mlx4_ib_demux_work *dmxw; 2149 2150 dmxw = container_of(work, struct mlx4_ib_demux_work, work); 2151 mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port, 2152 dmxw->do_init); 2153 kfree(dmxw); 2154 return; 2155 } 2156 2157 static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev, 2158 struct mlx4_ib_demux_ctx *ctx, 2159 int port) 2160 { 2161 char name[21]; 2162 int ret = 0; 2163 int i; 2164 2165 ctx->tun = kcalloc(dev->dev->caps.sqp_demux, 2166 sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL); 2167 if (!ctx->tun) 2168 return -ENOMEM; 2169 2170 ctx->dev = dev; 2171 ctx->port = port; 2172 ctx->ib_dev = &dev->ib_dev; 2173 2174 for (i = 0; 2175 i < min(dev->dev->caps.sqp_demux, 2176 (u16)(dev->dev->persist->num_vfs + 1)); 2177 i++) { 2178 struct mlx4_active_ports actv_ports = 2179 mlx4_get_active_ports(dev->dev, i); 2180 2181 if (!test_bit(port - 1, actv_ports.ports)) 2182 continue; 2183 2184 ret = alloc_pv_object(dev, i, port, &ctx->tun[i]); 2185 if (ret) { 2186 ret = -ENOMEM; 2187 goto err_mcg; 2188 } 2189 } 2190 2191 ret = mlx4_ib_mcg_port_init(ctx); 2192 if (ret) { 2193 pr_err("Failed initializing mcg para-virt (%d)\n", ret); 2194 goto err_mcg; 2195 } 2196 2197 snprintf(name, sizeof(name), "mlx4_ibt%d", port); 2198 ctx->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM); 2199 if (!ctx->wq) { 2200 pr_err("Failed to create tunnelling WQ for port %d\n", port); 2201 ret = -ENOMEM; 2202 goto err_wq; 2203 } 2204 2205 snprintf(name, sizeof(name), "mlx4_ibwi%d", port); 2206 ctx->wi_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM); 2207 if (!ctx->wi_wq) { 2208 pr_err("Failed to create wire WQ for port %d\n", port); 2209 ret = -ENOMEM; 2210 goto err_wiwq; 2211 } 2212 2213 snprintf(name, sizeof(name), "mlx4_ibud%d", port); 2214 ctx->ud_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM); 2215 if (!ctx->ud_wq) { 2216 pr_err("Failed to create up/down WQ for port %d\n", port); 2217 ret = -ENOMEM; 2218 goto err_udwq; 2219 } 2220 2221 return 0; 2222 2223 err_udwq: 2224 destroy_workqueue(ctx->wi_wq); 2225 ctx->wi_wq = NULL; 2226 2227 err_wiwq: 2228 destroy_workqueue(ctx->wq); 2229 ctx->wq = NULL; 2230 2231 err_wq: 2232 mlx4_ib_mcg_port_cleanup(ctx, 1); 2233 err_mcg: 2234 for (i = 0; i < dev->dev->caps.sqp_demux; i++) 2235 free_pv_object(dev, i, port); 2236 kfree(ctx->tun); 2237 ctx->tun = NULL; 2238 return ret; 2239 } 2240 2241 static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx) 2242 { 2243 if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) { 2244 sqp_ctx->state = DEMUX_PV_STATE_DOWNING; 2245 flush_workqueue(sqp_ctx->wq); 2246 if (sqp_ctx->has_smi) { 2247 ib_destroy_qp(sqp_ctx->qp[0].qp); 2248 sqp_ctx->qp[0].qp = NULL; 2249 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0); 2250 } 2251 ib_destroy_qp(sqp_ctx->qp[1].qp); 2252 sqp_ctx->qp[1].qp = NULL; 2253 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0); 2254 ib_dealloc_pd(sqp_ctx->pd); 2255 sqp_ctx->pd = NULL; 2256 ib_destroy_cq(sqp_ctx->cq); 2257 sqp_ctx->cq = NULL; 2258 sqp_ctx->state = DEMUX_PV_STATE_DOWN; 2259 } 2260 } 2261 2262 static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx) 2263 { 2264 int i; 2265 if (ctx) { 2266 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 2267 mlx4_ib_mcg_port_cleanup(ctx, 1); 2268 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 2269 if (!ctx->tun[i]) 2270 continue; 2271 if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN) 2272 ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING; 2273 } 2274 flush_workqueue(ctx->wq); 2275 flush_workqueue(ctx->wi_wq); 2276 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 2277 destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0); 2278 free_pv_object(dev, i, ctx->port); 2279 } 2280 kfree(ctx->tun); 2281 destroy_workqueue(ctx->ud_wq); 2282 destroy_workqueue(ctx->wi_wq); 2283 destroy_workqueue(ctx->wq); 2284 } 2285 } 2286 2287 static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init) 2288 { 2289 int i; 2290 2291 if (!mlx4_is_master(dev->dev)) 2292 return; 2293 /* initialize or tear down tunnel QPs for the master */ 2294 for (i = 0; i < dev->dev->caps.num_ports; i++) 2295 mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init); 2296 return; 2297 } 2298 2299 int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev) 2300 { 2301 int i = 0; 2302 int err; 2303 2304 if (!mlx4_is_mfunc(dev->dev)) 2305 return 0; 2306 2307 dev->sriov.is_going_down = 0; 2308 spin_lock_init(&dev->sriov.going_down_lock); 2309 mlx4_ib_cm_paravirt_init(dev); 2310 2311 mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n"); 2312 2313 if (mlx4_is_slave(dev->dev)) { 2314 mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n"); 2315 return 0; 2316 } 2317 2318 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 2319 if (i == mlx4_master_func_num(dev->dev)) 2320 mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid); 2321 else 2322 mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid()); 2323 } 2324 2325 err = mlx4_ib_init_alias_guid_service(dev); 2326 if (err) { 2327 mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n"); 2328 goto paravirt_err; 2329 } 2330 err = mlx4_ib_device_register_sysfs(dev); 2331 if (err) { 2332 mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n"); 2333 goto sysfs_err; 2334 } 2335 2336 mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n", 2337 dev->dev->caps.sqp_demux); 2338 for (i = 0; i < dev->num_ports; i++) { 2339 union ib_gid gid; 2340 err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1); 2341 if (err) 2342 goto demux_err; 2343 dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id; 2344 atomic64_set(&dev->sriov.demux[i].subnet_prefix, 2345 be64_to_cpu(gid.global.subnet_prefix)); 2346 err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1, 2347 &dev->sriov.sqps[i]); 2348 if (err) 2349 goto demux_err; 2350 err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1); 2351 if (err) 2352 goto free_pv; 2353 } 2354 mlx4_ib_master_tunnels(dev, 1); 2355 return 0; 2356 2357 free_pv: 2358 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1); 2359 demux_err: 2360 while (--i >= 0) { 2361 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1); 2362 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]); 2363 } 2364 mlx4_ib_device_unregister_sysfs(dev); 2365 2366 sysfs_err: 2367 mlx4_ib_destroy_alias_guid_service(dev); 2368 2369 paravirt_err: 2370 mlx4_ib_cm_paravirt_clean(dev, -1); 2371 2372 return err; 2373 } 2374 2375 void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev) 2376 { 2377 int i; 2378 unsigned long flags; 2379 2380 if (!mlx4_is_mfunc(dev->dev)) 2381 return; 2382 2383 spin_lock_irqsave(&dev->sriov.going_down_lock, flags); 2384 dev->sriov.is_going_down = 1; 2385 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags); 2386 if (mlx4_is_master(dev->dev)) { 2387 for (i = 0; i < dev->num_ports; i++) { 2388 flush_workqueue(dev->sriov.demux[i].ud_wq); 2389 mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]); 2390 kfree(dev->sriov.sqps[i]); 2391 dev->sriov.sqps[i] = NULL; 2392 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]); 2393 } 2394 2395 mlx4_ib_cm_paravirt_clean(dev, -1); 2396 mlx4_ib_destroy_alias_guid_service(dev); 2397 mlx4_ib_device_unregister_sysfs(dev); 2398 } 2399 } 2400