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 <dev/mlx4/cmd.h> 40 #include <dev/mlx4/driver.h> 41 #include <linux/gfp.h> 42 #include <rdma/ib_pma.h> 43 44 #include "mlx4_ib.h" 45 46 enum { 47 MLX4_IB_VENDOR_CLASS1 = 0x9, 48 MLX4_IB_VENDOR_CLASS2 = 0xa 49 }; 50 51 #define MLX4_TUN_SEND_WRID_SHIFT 34 52 #define MLX4_TUN_QPN_SHIFT 32 53 #define MLX4_TUN_WRID_RECV (((u64) 1) << MLX4_TUN_SEND_WRID_SHIFT) 54 #define MLX4_TUN_SET_WRID_QPN(a) (((u64) ((a) & 0x3)) << MLX4_TUN_QPN_SHIFT) 55 56 #define MLX4_TUN_IS_RECV(a) (((a) >> MLX4_TUN_SEND_WRID_SHIFT) & 0x1) 57 #define MLX4_TUN_WRID_QPN(a) (((a) >> MLX4_TUN_QPN_SHIFT) & 0x3) 58 59 /* Port mgmt change event handling */ 60 61 #define GET_BLK_PTR_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.block_ptr) 62 #define GET_MASK_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.tbl_entries_mask) 63 #define NUM_IDX_IN_PKEY_TBL_BLK 32 64 #define GUID_TBL_ENTRY_SIZE 8 /* size in bytes */ 65 #define GUID_TBL_BLK_NUM_ENTRIES 8 66 #define GUID_TBL_BLK_SIZE (GUID_TBL_ENTRY_SIZE * GUID_TBL_BLK_NUM_ENTRIES) 67 68 struct mlx4_mad_rcv_buf { 69 struct ib_grh grh; 70 u8 payload[256]; 71 } __packed; 72 73 struct mlx4_mad_snd_buf { 74 u8 payload[256]; 75 } __packed; 76 77 struct mlx4_tunnel_mad { 78 struct ib_grh grh; 79 struct mlx4_ib_tunnel_header hdr; 80 struct ib_mad mad; 81 } __packed; 82 83 struct mlx4_rcv_tunnel_mad { 84 struct mlx4_rcv_tunnel_hdr hdr; 85 struct ib_grh grh; 86 struct ib_mad mad; 87 } __packed; 88 89 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num); 90 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num); 91 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num, 92 int block, u32 change_bitmap); 93 94 __be64 mlx4_ib_gen_node_guid(void) 95 { 96 #define NODE_GUID_HI ((u64) (((u64)IB_OPENIB_OUI) << 40)) 97 return cpu_to_be64(NODE_GUID_HI | random()); 98 } 99 100 __be64 mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx *ctx) 101 { 102 return cpu_to_be64(atomic_inc_return(&ctx->tid)) | 103 cpu_to_be64(0xff00000000000000LL); 104 } 105 106 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags, 107 int port, const struct ib_wc *in_wc, 108 const struct ib_grh *in_grh, 109 const void *in_mad, void *response_mad) 110 { 111 struct mlx4_cmd_mailbox *inmailbox, *outmailbox; 112 void *inbox; 113 int err; 114 u32 in_modifier = port; 115 u8 op_modifier = 0; 116 117 inmailbox = mlx4_alloc_cmd_mailbox(dev->dev); 118 if (IS_ERR(inmailbox)) 119 return PTR_ERR(inmailbox); 120 inbox = inmailbox->buf; 121 122 outmailbox = mlx4_alloc_cmd_mailbox(dev->dev); 123 if (IS_ERR(outmailbox)) { 124 mlx4_free_cmd_mailbox(dev->dev, inmailbox); 125 return PTR_ERR(outmailbox); 126 } 127 128 memcpy(inbox, in_mad, 256); 129 130 /* 131 * Key check traps can't be generated unless we have in_wc to 132 * tell us where to send the trap. 133 */ 134 if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_MKEY) || !in_wc) 135 op_modifier |= 0x1; 136 if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_BKEY) || !in_wc) 137 op_modifier |= 0x2; 138 if (mlx4_is_mfunc(dev->dev) && 139 (mad_ifc_flags & MLX4_MAD_IFC_NET_VIEW || in_wc)) 140 op_modifier |= 0x8; 141 142 if (in_wc) { 143 struct { 144 __be32 my_qpn; 145 u32 reserved1; 146 __be32 rqpn; 147 u8 sl; 148 u8 g_path; 149 u16 reserved2[2]; 150 __be16 pkey; 151 u32 reserved3[11]; 152 u8 grh[40]; 153 } *ext_info; 154 155 memset(inbox + 256, 0, 256); 156 ext_info = inbox + 256; 157 158 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num); 159 ext_info->rqpn = cpu_to_be32(in_wc->src_qp); 160 ext_info->sl = in_wc->sl << 4; 161 ext_info->g_path = in_wc->dlid_path_bits | 162 (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0); 163 ext_info->pkey = cpu_to_be16(in_wc->pkey_index); 164 165 if (in_grh) 166 memcpy(ext_info->grh, in_grh, 40); 167 168 op_modifier |= 0x4; 169 170 in_modifier |= in_wc->slid << 16; 171 } 172 173 err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier, 174 mlx4_is_master(dev->dev) ? (op_modifier & ~0x8) : op_modifier, 175 MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C, 176 (op_modifier & 0x8) ? MLX4_CMD_NATIVE : MLX4_CMD_WRAPPED); 177 178 if (!err) 179 memcpy(response_mad, outmailbox->buf, 256); 180 181 mlx4_free_cmd_mailbox(dev->dev, inmailbox); 182 mlx4_free_cmd_mailbox(dev->dev, outmailbox); 183 184 return err; 185 } 186 187 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl) 188 { 189 struct ib_ah *new_ah; 190 struct ib_ah_attr ah_attr; 191 unsigned long flags; 192 193 if (!dev->send_agent[port_num - 1][0]) 194 return; 195 196 memset(&ah_attr, 0, sizeof ah_attr); 197 ah_attr.dlid = lid; 198 ah_attr.sl = sl; 199 ah_attr.port_num = port_num; 200 201 new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, 202 &ah_attr); 203 if (IS_ERR(new_ah)) 204 return; 205 206 spin_lock_irqsave(&dev->sm_lock, flags); 207 if (dev->sm_ah[port_num - 1]) 208 ib_destroy_ah(dev->sm_ah[port_num - 1]); 209 dev->sm_ah[port_num - 1] = new_ah; 210 spin_unlock_irqrestore(&dev->sm_lock, flags); 211 } 212 213 /* 214 * Snoop SM MADs for port info, GUID info, and P_Key table sets, so we can 215 * synthesize LID change, Client-Rereg, GID change, and P_Key change events. 216 */ 217 static void smp_snoop(struct ib_device *ibdev, u8 port_num, const struct ib_mad *mad, 218 u16 prev_lid) 219 { 220 struct ib_port_info *pinfo; 221 u16 lid; 222 __be16 *base; 223 u32 bn, pkey_change_bitmap; 224 int i; 225 226 227 struct mlx4_ib_dev *dev = to_mdev(ibdev); 228 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 229 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 230 mad->mad_hdr.method == IB_MGMT_METHOD_SET) 231 switch (mad->mad_hdr.attr_id) { 232 case IB_SMP_ATTR_PORT_INFO: 233 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV) 234 return; 235 pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data; 236 lid = be16_to_cpu(pinfo->lid); 237 238 update_sm_ah(dev, port_num, 239 be16_to_cpu(pinfo->sm_lid), 240 pinfo->neighbormtu_mastersmsl & 0xf); 241 242 if (pinfo->clientrereg_resv_subnetto & 0x80) 243 handle_client_rereg_event(dev, port_num); 244 245 if (prev_lid != lid) 246 handle_lid_change_event(dev, port_num); 247 break; 248 249 case IB_SMP_ATTR_PKEY_TABLE: 250 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV) 251 return; 252 if (!mlx4_is_mfunc(dev->dev)) { 253 mlx4_ib_dispatch_event(dev, port_num, 254 IB_EVENT_PKEY_CHANGE); 255 break; 256 } 257 258 /* at this point, we are running in the master. 259 * Slaves do not receive SMPs. 260 */ 261 bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod) & 0xFFFF; 262 base = (__be16 *) &(((struct ib_smp *)mad)->data[0]); 263 pkey_change_bitmap = 0; 264 for (i = 0; i < 32; i++) { 265 pr_debug("PKEY[%d] = x%x\n", 266 i + bn*32, be16_to_cpu(base[i])); 267 if (be16_to_cpu(base[i]) != 268 dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32]) { 269 pkey_change_bitmap |= (1 << i); 270 dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32] = 271 be16_to_cpu(base[i]); 272 } 273 } 274 pr_debug("PKEY Change event: port=%d, " 275 "block=0x%x, change_bitmap=0x%x\n", 276 port_num, bn, pkey_change_bitmap); 277 278 if (pkey_change_bitmap) { 279 mlx4_ib_dispatch_event(dev, port_num, 280 IB_EVENT_PKEY_CHANGE); 281 if (!dev->sriov.is_going_down) 282 __propagate_pkey_ev(dev, port_num, bn, 283 pkey_change_bitmap); 284 } 285 break; 286 287 case IB_SMP_ATTR_GUID_INFO: 288 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV) 289 return; 290 /* paravirtualized master's guid is guid 0 -- does not change */ 291 if (!mlx4_is_master(dev->dev)) 292 mlx4_ib_dispatch_event(dev, port_num, 293 IB_EVENT_GID_CHANGE); 294 /*if master, notify relevant slaves*/ 295 if (mlx4_is_master(dev->dev) && 296 !dev->sriov.is_going_down) { 297 bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod); 298 mlx4_ib_update_cache_on_guid_change(dev, bn, port_num, 299 (u8 *)(&((struct ib_smp *)mad)->data)); 300 mlx4_ib_notify_slaves_on_guid_change(dev, bn, port_num, 301 (u8 *)(&((struct ib_smp *)mad)->data)); 302 } 303 break; 304 305 case IB_SMP_ATTR_SL_TO_VL_TABLE: 306 /* cache sl to vl mapping changes for use in 307 * filling QP1 LRH VL field when sending packets 308 */ 309 if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV && 310 dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT) 311 return; 312 if (!mlx4_is_slave(dev->dev)) { 313 union sl2vl_tbl_to_u64 sl2vl64; 314 int jj; 315 316 for (jj = 0; jj < 8; jj++) { 317 sl2vl64.sl8[jj] = ((struct ib_smp *)mad)->data[jj]; 318 pr_debug("sl2vl[%d] = %02x\n", jj, sl2vl64.sl8[jj]); 319 } 320 atomic64_set(&dev->sl2vl[port_num - 1], sl2vl64.sl64); 321 } 322 break; 323 324 default: 325 break; 326 } 327 } 328 329 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num, 330 int block, u32 change_bitmap) 331 { 332 int i, ix, slave, err; 333 int have_event = 0; 334 335 for (slave = 0; slave < dev->dev->caps.sqp_demux; slave++) { 336 if (slave == mlx4_master_func_num(dev->dev)) 337 continue; 338 if (!mlx4_is_slave_active(dev->dev, slave)) 339 continue; 340 341 have_event = 0; 342 for (i = 0; i < 32; i++) { 343 if (!(change_bitmap & (1 << i))) 344 continue; 345 for (ix = 0; 346 ix < dev->dev->caps.pkey_table_len[port_num]; ix++) { 347 if (dev->pkeys.virt2phys_pkey[slave][port_num - 1] 348 [ix] == i + 32 * block) { 349 err = mlx4_gen_pkey_eqe(dev->dev, slave, port_num); 350 pr_debug("propagate_pkey_ev: slave %d," 351 " port %d, ix %d (%d)\n", 352 slave, port_num, ix, err); 353 have_event = 1; 354 break; 355 } 356 } 357 if (have_event) 358 break; 359 } 360 } 361 } 362 363 static void node_desc_override(struct ib_device *dev, 364 struct ib_mad *mad) 365 { 366 unsigned long flags; 367 368 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 369 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 370 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && 371 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { 372 spin_lock_irqsave(&to_mdev(dev)->sm_lock, flags); 373 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 374 IB_DEVICE_NODE_DESC_MAX); 375 spin_unlock_irqrestore(&to_mdev(dev)->sm_lock, flags); 376 } 377 } 378 379 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, const struct ib_mad *mad) 380 { 381 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; 382 struct ib_mad_send_buf *send_buf; 383 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; 384 int ret; 385 unsigned long flags; 386 387 if (agent) { 388 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, 389 IB_MGMT_MAD_DATA, GFP_ATOMIC, 390 IB_MGMT_BASE_VERSION); 391 if (IS_ERR(send_buf)) 392 return; 393 /* 394 * We rely here on the fact that MLX QPs don't use the 395 * address handle after the send is posted (this is 396 * wrong following the IB spec strictly, but we know 397 * it's OK for our devices). 398 */ 399 spin_lock_irqsave(&dev->sm_lock, flags); 400 memcpy(send_buf->mad, mad, sizeof *mad); 401 if ((send_buf->ah = dev->sm_ah[port_num - 1])) 402 ret = ib_post_send_mad(send_buf, NULL); 403 else 404 ret = -EINVAL; 405 spin_unlock_irqrestore(&dev->sm_lock, flags); 406 407 if (ret) 408 ib_free_send_mad(send_buf); 409 } 410 } 411 412 static int mlx4_ib_demux_sa_handler(struct ib_device *ibdev, int port, int slave, 413 struct ib_sa_mad *sa_mad) 414 { 415 int ret = 0; 416 417 /* dispatch to different sa handlers */ 418 switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) { 419 case IB_SA_ATTR_MC_MEMBER_REC: 420 ret = mlx4_ib_mcg_demux_handler(ibdev, port, slave, sa_mad); 421 break; 422 default: 423 break; 424 } 425 return ret; 426 } 427 428 int mlx4_ib_find_real_gid(struct ib_device *ibdev, u8 port, __be64 guid) 429 { 430 struct mlx4_ib_dev *dev = to_mdev(ibdev); 431 int i; 432 433 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 434 if (dev->sriov.demux[port - 1].guid_cache[i] == guid) 435 return i; 436 } 437 return -1; 438 } 439 440 441 static int find_slave_port_pkey_ix(struct mlx4_ib_dev *dev, int slave, 442 u8 port, u16 pkey, u16 *ix) 443 { 444 int i, ret; 445 u8 unassigned_pkey_ix, pkey_ix, partial_ix = 0xFF; 446 u16 slot_pkey; 447 448 if (slave == mlx4_master_func_num(dev->dev)) 449 return ib_find_cached_pkey(&dev->ib_dev, port, pkey, ix); 450 451 unassigned_pkey_ix = dev->dev->phys_caps.pkey_phys_table_len[port] - 1; 452 453 for (i = 0; i < dev->dev->caps.pkey_table_len[port]; i++) { 454 if (dev->pkeys.virt2phys_pkey[slave][port - 1][i] == unassigned_pkey_ix) 455 continue; 456 457 pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][i]; 458 459 ret = ib_get_cached_pkey(&dev->ib_dev, port, pkey_ix, &slot_pkey); 460 if (ret) 461 continue; 462 if ((slot_pkey & 0x7FFF) == (pkey & 0x7FFF)) { 463 if (slot_pkey & 0x8000) { 464 *ix = (u16) pkey_ix; 465 return 0; 466 } else { 467 /* take first partial pkey index found */ 468 if (partial_ix == 0xFF) 469 partial_ix = pkey_ix; 470 } 471 } 472 } 473 474 if (partial_ix < 0xFF) { 475 *ix = (u16) partial_ix; 476 return 0; 477 } 478 479 return -EINVAL; 480 } 481 482 int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port, 483 enum ib_qp_type dest_qpt, struct ib_wc *wc, 484 struct ib_grh *grh, struct ib_mad *mad) 485 { 486 struct ib_sge list; 487 struct ib_ud_wr wr; 488 struct ib_send_wr *bad_wr; 489 struct mlx4_ib_demux_pv_ctx *tun_ctx; 490 struct mlx4_ib_demux_pv_qp *tun_qp; 491 struct mlx4_rcv_tunnel_mad *tun_mad; 492 struct ib_ah_attr attr; 493 struct ib_ah *ah; 494 struct ib_qp *src_qp = NULL; 495 unsigned tun_tx_ix = 0; 496 int dqpn; 497 int ret = 0; 498 u16 tun_pkey_ix; 499 u16 cached_pkey; 500 u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH; 501 502 if (dest_qpt > IB_QPT_GSI) 503 return -EINVAL; 504 505 tun_ctx = dev->sriov.demux[port-1].tun[slave]; 506 507 /* check if proxy qp created */ 508 if (!tun_ctx || tun_ctx->state != DEMUX_PV_STATE_ACTIVE) 509 return -EAGAIN; 510 511 if (!dest_qpt) 512 tun_qp = &tun_ctx->qp[0]; 513 else 514 tun_qp = &tun_ctx->qp[1]; 515 516 /* compute P_Key index to put in tunnel header for slave */ 517 if (dest_qpt) { 518 u16 pkey_ix; 519 ret = ib_get_cached_pkey(&dev->ib_dev, port, wc->pkey_index, &cached_pkey); 520 if (ret) 521 return -EINVAL; 522 523 ret = find_slave_port_pkey_ix(dev, slave, port, cached_pkey, &pkey_ix); 524 if (ret) 525 return -EINVAL; 526 tun_pkey_ix = pkey_ix; 527 } else 528 tun_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0]; 529 530 dqpn = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave + port + (dest_qpt * 2) - 1; 531 532 /* get tunnel tx data buf for slave */ 533 src_qp = tun_qp->qp; 534 535 /* create ah. Just need an empty one with the port num for the post send. 536 * The driver will set the force loopback bit in post_send */ 537 memset(&attr, 0, sizeof attr); 538 attr.port_num = port; 539 if (is_eth) { 540 memcpy(&attr.grh.dgid.raw[0], &grh->dgid.raw[0], 16); 541 attr.ah_flags = IB_AH_GRH; 542 } 543 ah = ib_create_ah(tun_ctx->pd, &attr); 544 if (IS_ERR(ah)) 545 return -ENOMEM; 546 547 /* allocate tunnel tx buf after pass failure returns */ 548 spin_lock(&tun_qp->tx_lock); 549 if (tun_qp->tx_ix_head - tun_qp->tx_ix_tail >= 550 (MLX4_NUM_TUNNEL_BUFS - 1)) 551 ret = -EAGAIN; 552 else 553 tun_tx_ix = (++tun_qp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1); 554 spin_unlock(&tun_qp->tx_lock); 555 if (ret) 556 goto end; 557 558 tun_mad = (struct mlx4_rcv_tunnel_mad *) (tun_qp->tx_ring[tun_tx_ix].buf.addr); 559 if (tun_qp->tx_ring[tun_tx_ix].ah) 560 ib_destroy_ah(tun_qp->tx_ring[tun_tx_ix].ah); 561 tun_qp->tx_ring[tun_tx_ix].ah = ah; 562 ib_dma_sync_single_for_cpu(&dev->ib_dev, 563 tun_qp->tx_ring[tun_tx_ix].buf.map, 564 sizeof (struct mlx4_rcv_tunnel_mad), 565 DMA_TO_DEVICE); 566 567 /* copy over to tunnel buffer */ 568 if (grh) 569 memcpy(&tun_mad->grh, grh, sizeof *grh); 570 memcpy(&tun_mad->mad, mad, sizeof *mad); 571 572 /* adjust tunnel data */ 573 tun_mad->hdr.pkey_index = cpu_to_be16(tun_pkey_ix); 574 tun_mad->hdr.flags_src_qp = cpu_to_be32(wc->src_qp & 0xFFFFFF); 575 tun_mad->hdr.g_ml_path = (grh && (wc->wc_flags & IB_WC_GRH)) ? 0x80 : 0; 576 577 if (is_eth) { 578 u16 vlan = 0; 579 if (mlx4_get_slave_default_vlan(dev->dev, port, slave, &vlan, 580 NULL)) { 581 /* VST mode */ 582 if (vlan != wc->vlan_id) { 583 /* Packet vlan is not the VST-assigned vlan. 584 * Drop the packet. 585 */ 586 ret = -EPERM; 587 goto out; 588 } else { 589 /* Remove the vlan tag before forwarding 590 * the packet to the VF. 591 */ 592 vlan = 0xffff; 593 } 594 } else { 595 vlan = wc->vlan_id; 596 } 597 598 tun_mad->hdr.sl_vid = cpu_to_be16(vlan); 599 memcpy((char *)&tun_mad->hdr.mac_31_0, &(wc->smac[0]), 4); 600 memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2); 601 } else { 602 tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12); 603 tun_mad->hdr.slid_mac_47_32 = cpu_to_be16(wc->slid); 604 } 605 606 ib_dma_sync_single_for_device(&dev->ib_dev, 607 tun_qp->tx_ring[tun_tx_ix].buf.map, 608 sizeof (struct mlx4_rcv_tunnel_mad), 609 DMA_TO_DEVICE); 610 611 list.addr = tun_qp->tx_ring[tun_tx_ix].buf.map; 612 list.length = sizeof (struct mlx4_rcv_tunnel_mad); 613 list.lkey = tun_ctx->pd->local_dma_lkey; 614 615 wr.ah = ah; 616 wr.port_num = port; 617 wr.remote_qkey = IB_QP_SET_QKEY; 618 wr.remote_qpn = dqpn; 619 wr.wr.next = NULL; 620 wr.wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt); 621 wr.wr.sg_list = &list; 622 wr.wr.num_sge = 1; 623 wr.wr.opcode = IB_WR_SEND; 624 wr.wr.send_flags = IB_SEND_SIGNALED; 625 626 ret = ib_post_send(src_qp, &wr.wr, &bad_wr); 627 if (!ret) 628 return 0; 629 out: 630 spin_lock(&tun_qp->tx_lock); 631 tun_qp->tx_ix_tail++; 632 spin_unlock(&tun_qp->tx_lock); 633 tun_qp->tx_ring[tun_tx_ix].ah = NULL; 634 end: 635 ib_destroy_ah(ah); 636 return ret; 637 } 638 639 static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port, 640 struct ib_wc *wc, struct ib_grh *grh, 641 struct ib_mad *mad) 642 { 643 struct mlx4_ib_dev *dev = to_mdev(ibdev); 644 int err, other_port; 645 int slave = -1; 646 u8 *slave_id; 647 int is_eth = 0; 648 649 if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND) 650 is_eth = 0; 651 else 652 is_eth = 1; 653 654 if (is_eth) { 655 if (!(wc->wc_flags & IB_WC_GRH)) { 656 mlx4_ib_warn(ibdev, "RoCE grh not present.\n"); 657 return -EINVAL; 658 } 659 if (mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_CM) { 660 mlx4_ib_warn(ibdev, "RoCE mgmt class is not CM\n"); 661 return -EINVAL; 662 } 663 err = mlx4_get_slave_from_roce_gid(dev->dev, port, grh->dgid.raw, &slave); 664 if (err && mlx4_is_mf_bonded(dev->dev)) { 665 other_port = (port == 1) ? 2 : 1; 666 err = mlx4_get_slave_from_roce_gid(dev->dev, other_port, grh->dgid.raw, &slave); 667 if (!err) { 668 port = other_port; 669 pr_debug("resolved slave %d from gid %pI6 wire port %d other %d\n", 670 slave, grh->dgid.raw, port, other_port); 671 } 672 } 673 if (err) { 674 mlx4_ib_warn(ibdev, "failed matching grh\n"); 675 return -ENOENT; 676 } 677 if (slave >= dev->dev->caps.sqp_demux) { 678 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n", 679 slave, dev->dev->caps.sqp_demux); 680 return -ENOENT; 681 } 682 683 if (mlx4_ib_demux_cm_handler(ibdev, port, NULL, mad)) 684 return 0; 685 686 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad); 687 if (err) 688 pr_debug("failed sending to slave %d via tunnel qp (%d)\n", 689 slave, err); 690 return 0; 691 } 692 693 /* Initially assume that this mad is for us */ 694 slave = mlx4_master_func_num(dev->dev); 695 696 /* See if the slave id is encoded in a response mad */ 697 if (mad->mad_hdr.method & 0x80) { 698 slave_id = (u8 *) &mad->mad_hdr.tid; 699 slave = *slave_id; 700 if (slave != 255) /*255 indicates the dom0*/ 701 *slave_id = 0; /* remap tid */ 702 } 703 704 /* If a grh is present, we demux according to it */ 705 if (wc->wc_flags & IB_WC_GRH) { 706 slave = mlx4_ib_find_real_gid(ibdev, port, grh->dgid.global.interface_id); 707 if (slave < 0) { 708 mlx4_ib_warn(ibdev, "failed matching grh\n"); 709 return -ENOENT; 710 } 711 } 712 /* Class-specific handling */ 713 switch (mad->mad_hdr.mgmt_class) { 714 case IB_MGMT_CLASS_SUBN_LID_ROUTED: 715 case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE: 716 /* 255 indicates the dom0 */ 717 if (slave != 255 && slave != mlx4_master_func_num(dev->dev)) { 718 if (!mlx4_vf_smi_enabled(dev->dev, slave, port)) 719 return -EPERM; 720 /* for a VF. drop unsolicited MADs */ 721 if (!(mad->mad_hdr.method & IB_MGMT_METHOD_RESP)) { 722 mlx4_ib_warn(ibdev, "demux QP0. rejecting unsolicited mad for slave %d class 0x%x, method 0x%x\n", 723 slave, mad->mad_hdr.mgmt_class, 724 mad->mad_hdr.method); 725 return -EINVAL; 726 } 727 } 728 break; 729 case IB_MGMT_CLASS_SUBN_ADM: 730 if (mlx4_ib_demux_sa_handler(ibdev, port, slave, 731 (struct ib_sa_mad *) mad)) 732 return 0; 733 break; 734 case IB_MGMT_CLASS_CM: 735 if (mlx4_ib_demux_cm_handler(ibdev, port, &slave, mad)) 736 return 0; 737 break; 738 case IB_MGMT_CLASS_DEVICE_MGMT: 739 if (mad->mad_hdr.method != IB_MGMT_METHOD_GET_RESP) 740 return 0; 741 break; 742 default: 743 /* Drop unsupported classes for slaves in tunnel mode */ 744 if (slave != mlx4_master_func_num(dev->dev)) { 745 pr_debug("dropping unsupported ingress mad from class:%d " 746 "for slave:%d\n", mad->mad_hdr.mgmt_class, slave); 747 return 0; 748 } 749 } 750 /*make sure that no slave==255 was not handled yet.*/ 751 if (slave >= dev->dev->caps.sqp_demux) { 752 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n", 753 slave, dev->dev->caps.sqp_demux); 754 return -ENOENT; 755 } 756 757 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad); 758 if (err) 759 pr_debug("failed sending to slave %d via tunnel qp (%d)\n", 760 slave, err); 761 return 0; 762 } 763 764 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 765 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 766 const struct ib_mad *in_mad, struct ib_mad *out_mad) 767 { 768 u16 slid, prev_lid = 0; 769 int err; 770 struct ib_port_attr pattr; 771 772 if (in_wc && in_wc->qp->qp_num) { 773 pr_debug("received MAD: slid:%d sqpn:%d " 774 "dlid_bits:%d dqpn:%d wc_flags:0x%x, cls %x, mtd %x, atr %x\n", 775 in_wc->slid, in_wc->src_qp, 776 in_wc->dlid_path_bits, 777 in_wc->qp->qp_num, 778 in_wc->wc_flags, 779 in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method, 780 be16_to_cpu(in_mad->mad_hdr.attr_id)); 781 if (in_wc->wc_flags & IB_WC_GRH) { 782 pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n", 783 (unsigned long long)be64_to_cpu(in_grh->sgid.global.subnet_prefix), 784 (unsigned long long)be64_to_cpu(in_grh->sgid.global.interface_id)); 785 pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n", 786 (unsigned long long)be64_to_cpu(in_grh->dgid.global.subnet_prefix), 787 (unsigned long long)be64_to_cpu(in_grh->dgid.global.interface_id)); 788 } 789 } 790 791 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); 792 793 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { 794 forward_trap(to_mdev(ibdev), port_num, in_mad); 795 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 796 } 797 798 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 799 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 800 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 801 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && 802 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) 803 return IB_MAD_RESULT_SUCCESS; 804 805 /* 806 * Don't process SMInfo queries -- the SMA can't handle them. 807 */ 808 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO) 809 return IB_MAD_RESULT_SUCCESS; 810 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || 811 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 || 812 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 || 813 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { 814 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 815 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) 816 return IB_MAD_RESULT_SUCCESS; 817 } else 818 return IB_MAD_RESULT_SUCCESS; 819 820 if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 821 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 822 in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && 823 in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && 824 !ib_query_port(ibdev, port_num, &pattr)) 825 prev_lid = pattr.lid; 826 827 err = mlx4_MAD_IFC(to_mdev(ibdev), 828 (mad_flags & IB_MAD_IGNORE_MKEY ? MLX4_MAD_IFC_IGNORE_MKEY : 0) | 829 (mad_flags & IB_MAD_IGNORE_BKEY ? MLX4_MAD_IFC_IGNORE_BKEY : 0) | 830 MLX4_MAD_IFC_NET_VIEW, 831 port_num, in_wc, in_grh, in_mad, out_mad); 832 if (err) 833 return IB_MAD_RESULT_FAILURE; 834 835 if (!out_mad->mad_hdr.status) { 836 smp_snoop(ibdev, port_num, in_mad, prev_lid); 837 /* slaves get node desc from FW */ 838 if (!mlx4_is_slave(to_mdev(ibdev)->dev)) 839 node_desc_override(ibdev, out_mad); 840 } 841 842 /* set return bit in status of directed route responses */ 843 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 844 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); 845 846 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) 847 /* no response for trap repress */ 848 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 849 850 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 851 } 852 853 static void edit_counter(struct mlx4_counter *cnt, void *counters, 854 __be16 attr_id) 855 { 856 switch (attr_id) { 857 case IB_PMA_PORT_COUNTERS: 858 { 859 struct ib_pma_portcounters *pma_cnt = 860 (struct ib_pma_portcounters *)counters; 861 862 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_data, 863 (be64_to_cpu(cnt->tx_bytes) >> 2)); 864 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_data, 865 (be64_to_cpu(cnt->rx_bytes) >> 2)); 866 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_packets, 867 be64_to_cpu(cnt->tx_frames)); 868 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_packets, 869 be64_to_cpu(cnt->rx_frames)); 870 break; 871 } 872 case IB_PMA_PORT_COUNTERS_EXT: 873 { 874 struct ib_pma_portcounters_ext *pma_cnt_ext = 875 (struct ib_pma_portcounters_ext *)counters; 876 877 pma_cnt_ext->port_xmit_data = 878 cpu_to_be64(be64_to_cpu(cnt->tx_bytes) >> 2); 879 pma_cnt_ext->port_rcv_data = 880 cpu_to_be64(be64_to_cpu(cnt->rx_bytes) >> 2); 881 pma_cnt_ext->port_xmit_packets = cnt->tx_frames; 882 pma_cnt_ext->port_rcv_packets = cnt->rx_frames; 883 break; 884 } 885 default: 886 break; 887 } 888 } 889 890 static int iboe_process_mad_port_info(void *out_mad) 891 { 892 struct ib_class_port_info cpi = {}; 893 894 cpi.capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH; 895 memcpy(out_mad, &cpi, sizeof(cpi)); 896 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 897 } 898 899 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 900 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 901 const struct ib_mad *in_mad, struct ib_mad *out_mad) 902 { 903 struct mlx4_counter counter_stats; 904 struct mlx4_ib_dev *dev = to_mdev(ibdev); 905 struct counter_index *tmp_counter; 906 int err = IB_MAD_RESULT_FAILURE, stats_avail = 0; 907 908 if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT) 909 return -EINVAL; 910 911 if (in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO) 912 return iboe_process_mad_port_info((void *)(out_mad->data + 40)); 913 914 memset(&counter_stats, 0, sizeof(counter_stats)); 915 mutex_lock(&dev->counters_table[port_num - 1].mutex); 916 list_for_each_entry(tmp_counter, 917 &dev->counters_table[port_num - 1].counters_list, 918 list) { 919 err = mlx4_get_counter_stats(dev->dev, 920 tmp_counter->index, 921 &counter_stats, 0); 922 if (err) { 923 err = IB_MAD_RESULT_FAILURE; 924 stats_avail = 0; 925 break; 926 } 927 stats_avail = 1; 928 } 929 mutex_unlock(&dev->counters_table[port_num - 1].mutex); 930 if (stats_avail) { 931 memset(out_mad->data, 0, sizeof out_mad->data); 932 switch (counter_stats.counter_mode & 0xf) { 933 case 0: 934 edit_counter(&counter_stats, 935 (void *)(out_mad->data + 40), 936 in_mad->mad_hdr.attr_id); 937 err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 938 break; 939 default: 940 err = IB_MAD_RESULT_FAILURE; 941 } 942 } 943 944 return err; 945 } 946 947 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 948 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 949 const struct ib_mad_hdr *in, size_t in_mad_size, 950 struct ib_mad_hdr *out, size_t *out_mad_size, 951 u16 *out_mad_pkey_index) 952 { 953 struct mlx4_ib_dev *dev = to_mdev(ibdev); 954 const struct ib_mad *in_mad = (const struct ib_mad *)in; 955 struct ib_mad *out_mad = (struct ib_mad *)out; 956 enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num); 957 958 if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) || 959 *out_mad_size != sizeof(*out_mad))) 960 return IB_MAD_RESULT_FAILURE; 961 962 /* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA 963 * queries, should be called only by VFs and for that specific purpose 964 */ 965 if (link == IB_LINK_LAYER_INFINIBAND) { 966 if (mlx4_is_slave(dev->dev) && 967 (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT && 968 (in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS || 969 in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT || 970 in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO))) 971 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, 972 in_grh, in_mad, out_mad); 973 974 return ib_process_mad(ibdev, mad_flags, port_num, in_wc, 975 in_grh, in_mad, out_mad); 976 } 977 978 if (link == IB_LINK_LAYER_ETHERNET) 979 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, 980 in_grh, in_mad, out_mad); 981 982 return -EINVAL; 983 } 984 985 static void send_handler(struct ib_mad_agent *agent, 986 struct ib_mad_send_wc *mad_send_wc) 987 { 988 if (mad_send_wc->send_buf->context[0]) 989 ib_destroy_ah(mad_send_wc->send_buf->context[0]); 990 ib_free_send_mad(mad_send_wc->send_buf); 991 } 992 993 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev) 994 { 995 struct ib_mad_agent *agent; 996 int p, q; 997 int ret; 998 enum rdma_link_layer ll; 999 1000 for (p = 0; p < dev->num_ports; ++p) { 1001 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1); 1002 for (q = 0; q <= 1; ++q) { 1003 if (ll == IB_LINK_LAYER_INFINIBAND) { 1004 agent = ib_register_mad_agent(&dev->ib_dev, p + 1, 1005 q ? IB_QPT_GSI : IB_QPT_SMI, 1006 NULL, 0, send_handler, 1007 NULL, NULL, 0); 1008 if (IS_ERR(agent)) { 1009 ret = PTR_ERR(agent); 1010 goto err; 1011 } 1012 dev->send_agent[p][q] = agent; 1013 } else 1014 dev->send_agent[p][q] = NULL; 1015 } 1016 } 1017 1018 return 0; 1019 1020 err: 1021 for (p = 0; p < dev->num_ports; ++p) 1022 for (q = 0; q <= 1; ++q) 1023 if (dev->send_agent[p][q]) 1024 ib_unregister_mad_agent(dev->send_agent[p][q]); 1025 1026 return ret; 1027 } 1028 1029 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) 1030 { 1031 struct ib_mad_agent *agent; 1032 int p, q; 1033 1034 for (p = 0; p < dev->num_ports; ++p) { 1035 for (q = 0; q <= 1; ++q) { 1036 agent = dev->send_agent[p][q]; 1037 if (agent) { 1038 dev->send_agent[p][q] = NULL; 1039 ib_unregister_mad_agent(agent); 1040 } 1041 } 1042 1043 if (dev->sm_ah[p]) 1044 ib_destroy_ah(dev->sm_ah[p]); 1045 } 1046 } 1047 1048 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num) 1049 { 1050 mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_LID_CHANGE); 1051 1052 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down) 1053 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num, 1054 MLX4_EQ_PORT_INFO_LID_CHANGE_MASK); 1055 } 1056 1057 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num) 1058 { 1059 /* re-configure the alias-guid and mcg's */ 1060 if (mlx4_is_master(dev->dev)) { 1061 mlx4_ib_invalidate_all_guid_record(dev, port_num); 1062 1063 if (!dev->sriov.is_going_down) { 1064 mlx4_ib_mcg_port_cleanup(&dev->sriov.demux[port_num - 1], 0); 1065 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num, 1066 MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK); 1067 } 1068 } 1069 1070 /* Update the sl to vl table from inside client rereg 1071 * only if in secure-host mode (snooping is not possible) 1072 * and the sl-to-vl change event is not generated by FW. 1073 */ 1074 if (!mlx4_is_slave(dev->dev) && 1075 dev->dev->flags & MLX4_FLAG_SECURE_HOST && 1076 !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)) { 1077 if (mlx4_is_master(dev->dev)) 1078 /* already in work queue from mlx4_ib_event queueing 1079 * mlx4_handle_port_mgmt_change_event, which calls 1080 * this procedure. Therefore, call sl2vl_update directly. 1081 */ 1082 mlx4_ib_sl2vl_update(dev, port_num); 1083 else 1084 mlx4_sched_ib_sl2vl_update_work(dev, port_num); 1085 } 1086 mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_CLIENT_REREGISTER); 1087 } 1088 1089 static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num, 1090 struct mlx4_eqe *eqe) 1091 { 1092 __propagate_pkey_ev(dev, port_num, GET_BLK_PTR_FROM_EQE(eqe), 1093 GET_MASK_FROM_EQE(eqe)); 1094 } 1095 1096 static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num, 1097 u32 guid_tbl_blk_num, u32 change_bitmap) 1098 { 1099 struct ib_smp *in_mad = NULL; 1100 struct ib_smp *out_mad = NULL; 1101 u16 i; 1102 1103 if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev)) 1104 return; 1105 1106 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL); 1107 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 1108 if (!in_mad || !out_mad) { 1109 mlx4_ib_warn(&dev->ib_dev, "failed to allocate memory for guid info mads\n"); 1110 goto out; 1111 } 1112 1113 guid_tbl_blk_num *= 4; 1114 1115 for (i = 0; i < 4; i++) { 1116 if (change_bitmap && (!((change_bitmap >> (8 * i)) & 0xff))) 1117 continue; 1118 memset(in_mad, 0, sizeof *in_mad); 1119 memset(out_mad, 0, sizeof *out_mad); 1120 1121 in_mad->base_version = 1; 1122 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED; 1123 in_mad->class_version = 1; 1124 in_mad->method = IB_MGMT_METHOD_GET; 1125 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO; 1126 in_mad->attr_mod = cpu_to_be32(guid_tbl_blk_num + i); 1127 1128 if (mlx4_MAD_IFC(dev, 1129 MLX4_MAD_IFC_IGNORE_KEYS | MLX4_MAD_IFC_NET_VIEW, 1130 port_num, NULL, NULL, in_mad, out_mad)) { 1131 mlx4_ib_warn(&dev->ib_dev, "Failed in get GUID INFO MAD_IFC\n"); 1132 goto out; 1133 } 1134 1135 mlx4_ib_update_cache_on_guid_change(dev, guid_tbl_blk_num + i, 1136 port_num, 1137 (u8 *)(&((struct ib_smp *)out_mad)->data)); 1138 mlx4_ib_notify_slaves_on_guid_change(dev, guid_tbl_blk_num + i, 1139 port_num, 1140 (u8 *)(&((struct ib_smp *)out_mad)->data)); 1141 } 1142 1143 out: 1144 kfree(in_mad); 1145 kfree(out_mad); 1146 return; 1147 } 1148 1149 void handle_port_mgmt_change_event(struct work_struct *work) 1150 { 1151 struct ib_event_work *ew = container_of(work, struct ib_event_work, work); 1152 struct mlx4_ib_dev *dev = ew->ib_dev; 1153 struct mlx4_eqe *eqe = &(ew->ib_eqe); 1154 u8 port = eqe->event.port_mgmt_change.port; 1155 u32 changed_attr; 1156 u32 tbl_block; 1157 u32 change_bitmap; 1158 1159 switch (eqe->subtype) { 1160 case MLX4_DEV_PMC_SUBTYPE_PORT_INFO: 1161 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr); 1162 1163 /* Update the SM ah - This should be done before handling 1164 the other changed attributes so that MADs can be sent to the SM */ 1165 if (changed_attr & MSTR_SM_CHANGE_MASK) { 1166 u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid); 1167 u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf; 1168 update_sm_ah(dev, port, lid, sl); 1169 } 1170 1171 /* Check if it is a lid change event */ 1172 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK) 1173 handle_lid_change_event(dev, port); 1174 1175 /* Generate GUID changed event */ 1176 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) { 1177 if (mlx4_is_master(dev->dev)) { 1178 union ib_gid gid; 1179 int err = 0; 1180 1181 if (!eqe->event.port_mgmt_change.params.port_info.gid_prefix) 1182 err = __mlx4_ib_query_gid(&dev->ib_dev, port, 0, &gid, 1); 1183 else 1184 gid.global.subnet_prefix = 1185 eqe->event.port_mgmt_change.params.port_info.gid_prefix; 1186 if (err) { 1187 pr_warn("Could not change QP1 subnet prefix for port %d: query_gid error (%d)\n", 1188 port, err); 1189 } else { 1190 pr_debug("Changing QP1 subnet prefix for port %d. old=0x%llx. new=0x%llx\n", 1191 port, 1192 (long long)atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix), 1193 (long long)be64_to_cpu(gid.global.subnet_prefix)); 1194 atomic64_set(&dev->sriov.demux[port - 1].subnet_prefix, 1195 be64_to_cpu(gid.global.subnet_prefix)); 1196 } 1197 } 1198 mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE); 1199 /*if master, notify all slaves*/ 1200 if (mlx4_is_master(dev->dev)) 1201 mlx4_gen_slaves_port_mgt_ev(dev->dev, port, 1202 MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK); 1203 } 1204 1205 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK) 1206 handle_client_rereg_event(dev, port); 1207 break; 1208 1209 case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE: 1210 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE); 1211 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down) 1212 propagate_pkey_ev(dev, port, eqe); 1213 break; 1214 case MLX4_DEV_PMC_SUBTYPE_GUID_INFO: 1215 /* paravirtualized master's guid is guid 0 -- does not change */ 1216 if (!mlx4_is_master(dev->dev)) 1217 mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE); 1218 /*if master, notify relevant slaves*/ 1219 else if (!dev->sriov.is_going_down) { 1220 tbl_block = GET_BLK_PTR_FROM_EQE(eqe); 1221 change_bitmap = GET_MASK_FROM_EQE(eqe); 1222 handle_slaves_guid_change(dev, port, tbl_block, change_bitmap); 1223 } 1224 break; 1225 1226 case MLX4_DEV_PMC_SUBTYPE_SL_TO_VL_MAP: 1227 /* cache sl to vl mapping changes for use in 1228 * filling QP1 LRH VL field when sending packets 1229 */ 1230 if (!mlx4_is_slave(dev->dev)) { 1231 union sl2vl_tbl_to_u64 sl2vl64; 1232 int jj; 1233 1234 for (jj = 0; jj < 8; jj++) { 1235 sl2vl64.sl8[jj] = 1236 eqe->event.port_mgmt_change.params.sl2vl_tbl_change_info.sl2vl_table[jj]; 1237 pr_debug("sl2vl[%d] = %02x\n", jj, sl2vl64.sl8[jj]); 1238 } 1239 atomic64_set(&dev->sl2vl[port - 1], sl2vl64.sl64); 1240 } 1241 break; 1242 default: 1243 pr_warn("Unsupported subtype 0x%x for " 1244 "Port Management Change event\n", eqe->subtype); 1245 } 1246 1247 kfree(ew); 1248 } 1249 1250 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num, 1251 enum ib_event_type type) 1252 { 1253 struct ib_event event; 1254 1255 event.device = &dev->ib_dev; 1256 event.element.port_num = port_num; 1257 event.event = type; 1258 1259 ib_dispatch_event(&event); 1260 } 1261 1262 static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg) 1263 { 1264 unsigned long flags; 1265 struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context; 1266 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 1267 spin_lock_irqsave(&dev->sriov.going_down_lock, flags); 1268 if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE) 1269 queue_work(ctx->wq, &ctx->work); 1270 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags); 1271 } 1272 1273 static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx, 1274 struct mlx4_ib_demux_pv_qp *tun_qp, 1275 int index) 1276 { 1277 struct ib_sge sg_list; 1278 struct ib_recv_wr recv_wr, *bad_recv_wr; 1279 int size; 1280 1281 size = (tun_qp->qp->qp_type == IB_QPT_UD) ? 1282 sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf); 1283 1284 sg_list.addr = tun_qp->ring[index].map; 1285 sg_list.length = size; 1286 sg_list.lkey = ctx->pd->local_dma_lkey; 1287 1288 recv_wr.next = NULL; 1289 recv_wr.sg_list = &sg_list; 1290 recv_wr.num_sge = 1; 1291 recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV | 1292 MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt); 1293 ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map, 1294 size, DMA_FROM_DEVICE); 1295 return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr); 1296 } 1297 1298 static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port, 1299 int slave, struct ib_sa_mad *sa_mad) 1300 { 1301 int ret = 0; 1302 1303 /* dispatch to different sa handlers */ 1304 switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) { 1305 case IB_SA_ATTR_MC_MEMBER_REC: 1306 ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad); 1307 break; 1308 default: 1309 break; 1310 } 1311 return ret; 1312 } 1313 1314 static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave) 1315 { 1316 int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave; 1317 1318 return (qpn >= proxy_start && qpn <= proxy_start + 1); 1319 } 1320 1321 1322 int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u8 port, 1323 enum ib_qp_type dest_qpt, u16 pkey_index, 1324 u32 remote_qpn, u32 qkey, struct ib_ah_attr *attr, 1325 u8 *s_mac, u16 vlan_id, struct ib_mad *mad) 1326 { 1327 struct ib_sge list; 1328 struct ib_ud_wr wr; 1329 struct ib_send_wr *bad_wr; 1330 struct mlx4_ib_demux_pv_ctx *sqp_ctx; 1331 struct mlx4_ib_demux_pv_qp *sqp; 1332 struct mlx4_mad_snd_buf *sqp_mad; 1333 struct ib_ah *ah; 1334 struct ib_qp *send_qp = NULL; 1335 unsigned wire_tx_ix = 0; 1336 int ret = 0; 1337 u16 wire_pkey_ix; 1338 int src_qpnum; 1339 u8 sgid_index; 1340 1341 1342 sqp_ctx = dev->sriov.sqps[port-1]; 1343 1344 /* check if proxy qp created */ 1345 if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE) 1346 return -EAGAIN; 1347 1348 if (dest_qpt == IB_QPT_SMI) { 1349 src_qpnum = 0; 1350 sqp = &sqp_ctx->qp[0]; 1351 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0]; 1352 } else { 1353 src_qpnum = 1; 1354 sqp = &sqp_ctx->qp[1]; 1355 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index]; 1356 } 1357 1358 send_qp = sqp->qp; 1359 1360 /* create ah */ 1361 sgid_index = attr->grh.sgid_index; 1362 attr->grh.sgid_index = 0; 1363 ah = ib_create_ah(sqp_ctx->pd, attr); 1364 if (IS_ERR(ah)) 1365 return -ENOMEM; 1366 attr->grh.sgid_index = sgid_index; 1367 to_mah(ah)->av.ib.gid_index = sgid_index; 1368 /* get rid of force-loopback bit */ 1369 to_mah(ah)->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF); 1370 spin_lock(&sqp->tx_lock); 1371 if (sqp->tx_ix_head - sqp->tx_ix_tail >= 1372 (MLX4_NUM_TUNNEL_BUFS - 1)) 1373 ret = -EAGAIN; 1374 else 1375 wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1); 1376 spin_unlock(&sqp->tx_lock); 1377 if (ret) 1378 goto out; 1379 1380 sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr); 1381 if (sqp->tx_ring[wire_tx_ix].ah) 1382 ib_destroy_ah(sqp->tx_ring[wire_tx_ix].ah); 1383 sqp->tx_ring[wire_tx_ix].ah = ah; 1384 ib_dma_sync_single_for_cpu(&dev->ib_dev, 1385 sqp->tx_ring[wire_tx_ix].buf.map, 1386 sizeof (struct mlx4_mad_snd_buf), 1387 DMA_TO_DEVICE); 1388 1389 memcpy(&sqp_mad->payload, mad, sizeof *mad); 1390 1391 ib_dma_sync_single_for_device(&dev->ib_dev, 1392 sqp->tx_ring[wire_tx_ix].buf.map, 1393 sizeof (struct mlx4_mad_snd_buf), 1394 DMA_TO_DEVICE); 1395 1396 list.addr = sqp->tx_ring[wire_tx_ix].buf.map; 1397 list.length = sizeof (struct mlx4_mad_snd_buf); 1398 list.lkey = sqp_ctx->pd->local_dma_lkey; 1399 1400 wr.ah = ah; 1401 wr.port_num = port; 1402 wr.pkey_index = wire_pkey_ix; 1403 wr.remote_qkey = qkey; 1404 wr.remote_qpn = remote_qpn; 1405 wr.wr.next = NULL; 1406 wr.wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum); 1407 wr.wr.sg_list = &list; 1408 wr.wr.num_sge = 1; 1409 wr.wr.opcode = IB_WR_SEND; 1410 wr.wr.send_flags = IB_SEND_SIGNALED; 1411 if (s_mac) 1412 memcpy(to_mah(ah)->av.eth.s_mac, s_mac, 6); 1413 if (vlan_id < 0x1000) 1414 vlan_id |= (attr->sl & 7) << 13; 1415 to_mah(ah)->av.eth.vlan = cpu_to_be16(vlan_id); 1416 1417 1418 ret = ib_post_send(send_qp, &wr.wr, &bad_wr); 1419 if (!ret) 1420 return 0; 1421 1422 spin_lock(&sqp->tx_lock); 1423 sqp->tx_ix_tail++; 1424 spin_unlock(&sqp->tx_lock); 1425 sqp->tx_ring[wire_tx_ix].ah = NULL; 1426 out: 1427 ib_destroy_ah(ah); 1428 return ret; 1429 } 1430 1431 static int get_slave_base_gid_ix(struct mlx4_ib_dev *dev, int slave, int port) 1432 { 1433 if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND) 1434 return slave; 1435 return mlx4_get_base_gid_ix(dev->dev, slave, port); 1436 } 1437 1438 static void fill_in_real_sgid_index(struct mlx4_ib_dev *dev, int slave, int port, 1439 struct ib_ah_attr *ah_attr) 1440 { 1441 if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND) 1442 ah_attr->grh.sgid_index = slave; 1443 else 1444 ah_attr->grh.sgid_index += get_slave_base_gid_ix(dev, slave, port); 1445 } 1446 1447 static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc) 1448 { 1449 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 1450 struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)]; 1451 int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1); 1452 struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr; 1453 struct mlx4_ib_ah ah; 1454 struct ib_ah_attr ah_attr; 1455 u8 *slave_id; 1456 int slave; 1457 int port; 1458 u16 vlan_id; 1459 1460 /* Get slave that sent this packet */ 1461 if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn || 1462 wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX || 1463 (wc->src_qp & 0x1) != ctx->port - 1 || 1464 wc->src_qp & 0x4) { 1465 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp); 1466 return; 1467 } 1468 slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8; 1469 if (slave != ctx->slave) { 1470 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: " 1471 "belongs to another slave\n", wc->src_qp); 1472 return; 1473 } 1474 1475 /* Map transaction ID */ 1476 ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map, 1477 sizeof (struct mlx4_tunnel_mad), 1478 DMA_FROM_DEVICE); 1479 switch (tunnel->mad.mad_hdr.method) { 1480 case IB_MGMT_METHOD_SET: 1481 case IB_MGMT_METHOD_GET: 1482 case IB_MGMT_METHOD_REPORT: 1483 case IB_SA_METHOD_GET_TABLE: 1484 case IB_SA_METHOD_DELETE: 1485 case IB_SA_METHOD_GET_MULTI: 1486 case IB_SA_METHOD_GET_TRACE_TBL: 1487 slave_id = (u8 *) &tunnel->mad.mad_hdr.tid; 1488 if (*slave_id) { 1489 mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d " 1490 "class:%d slave:%d\n", *slave_id, 1491 tunnel->mad.mad_hdr.mgmt_class, slave); 1492 return; 1493 } else 1494 *slave_id = slave; 1495 default: 1496 /* nothing */; 1497 } 1498 1499 /* Class-specific handling */ 1500 switch (tunnel->mad.mad_hdr.mgmt_class) { 1501 case IB_MGMT_CLASS_SUBN_LID_ROUTED: 1502 case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE: 1503 if (slave != mlx4_master_func_num(dev->dev) && 1504 !mlx4_vf_smi_enabled(dev->dev, slave, ctx->port)) 1505 return; 1506 break; 1507 case IB_MGMT_CLASS_SUBN_ADM: 1508 if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave, 1509 (struct ib_sa_mad *) &tunnel->mad)) 1510 return; 1511 break; 1512 case IB_MGMT_CLASS_CM: 1513 if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave, 1514 (struct ib_mad *) &tunnel->mad)) 1515 return; 1516 break; 1517 case IB_MGMT_CLASS_DEVICE_MGMT: 1518 if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET && 1519 tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET) 1520 return; 1521 break; 1522 default: 1523 /* Drop unsupported classes for slaves in tunnel mode */ 1524 if (slave != mlx4_master_func_num(dev->dev)) { 1525 mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d " 1526 "for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave); 1527 return; 1528 } 1529 } 1530 1531 /* We are using standard ib_core services to send the mad, so generate a 1532 * stadard address handle by decoding the tunnelled mlx4_ah fields */ 1533 memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av)); 1534 ah.ibah.device = ctx->ib_dev; 1535 1536 port = be32_to_cpu(ah.av.ib.port_pd) >> 24; 1537 port = mlx4_slave_convert_port(dev->dev, slave, port); 1538 if (port < 0) 1539 return; 1540 ah.av.ib.port_pd = cpu_to_be32(port << 24 | (be32_to_cpu(ah.av.ib.port_pd) & 0xffffff)); 1541 1542 mlx4_ib_query_ah(&ah.ibah, &ah_attr); 1543 if (ah_attr.ah_flags & IB_AH_GRH) 1544 fill_in_real_sgid_index(dev, slave, ctx->port, &ah_attr); 1545 1546 memcpy(ah_attr.dmac, tunnel->hdr.mac, 6); 1547 vlan_id = be16_to_cpu(tunnel->hdr.vlan); 1548 /* if slave have default vlan use it */ 1549 mlx4_get_slave_default_vlan(dev->dev, ctx->port, slave, 1550 &vlan_id, &ah_attr.sl); 1551 1552 mlx4_ib_send_to_wire(dev, slave, ctx->port, 1553 is_proxy_qp0(dev, wc->src_qp, slave) ? 1554 IB_QPT_SMI : IB_QPT_GSI, 1555 be16_to_cpu(tunnel->hdr.pkey_index), 1556 be32_to_cpu(tunnel->hdr.remote_qpn), 1557 be32_to_cpu(tunnel->hdr.qkey), 1558 &ah_attr, wc->smac, vlan_id, &tunnel->mad); 1559 } 1560 1561 static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx, 1562 enum ib_qp_type qp_type, int is_tun) 1563 { 1564 int i; 1565 struct mlx4_ib_demux_pv_qp *tun_qp; 1566 int rx_buf_size, tx_buf_size; 1567 1568 if (qp_type > IB_QPT_GSI) 1569 return -EINVAL; 1570 1571 tun_qp = &ctx->qp[qp_type]; 1572 1573 tun_qp->ring = kzalloc(sizeof (struct mlx4_ib_buf) * MLX4_NUM_TUNNEL_BUFS, 1574 GFP_KERNEL); 1575 if (!tun_qp->ring) 1576 return -ENOMEM; 1577 1578 tun_qp->tx_ring = kcalloc(MLX4_NUM_TUNNEL_BUFS, 1579 sizeof (struct mlx4_ib_tun_tx_buf), 1580 GFP_KERNEL); 1581 if (!tun_qp->tx_ring) { 1582 kfree(tun_qp->ring); 1583 tun_qp->ring = NULL; 1584 return -ENOMEM; 1585 } 1586 1587 if (is_tun) { 1588 rx_buf_size = sizeof (struct mlx4_tunnel_mad); 1589 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad); 1590 } else { 1591 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf); 1592 tx_buf_size = sizeof (struct mlx4_mad_snd_buf); 1593 } 1594 1595 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1596 tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL); 1597 if (!tun_qp->ring[i].addr) 1598 goto err; 1599 tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev, 1600 tun_qp->ring[i].addr, 1601 rx_buf_size, 1602 DMA_FROM_DEVICE); 1603 if (ib_dma_mapping_error(ctx->ib_dev, tun_qp->ring[i].map)) { 1604 kfree(tun_qp->ring[i].addr); 1605 goto err; 1606 } 1607 } 1608 1609 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1610 tun_qp->tx_ring[i].buf.addr = 1611 kmalloc(tx_buf_size, GFP_KERNEL); 1612 if (!tun_qp->tx_ring[i].buf.addr) 1613 goto tx_err; 1614 tun_qp->tx_ring[i].buf.map = 1615 ib_dma_map_single(ctx->ib_dev, 1616 tun_qp->tx_ring[i].buf.addr, 1617 tx_buf_size, 1618 DMA_TO_DEVICE); 1619 if (ib_dma_mapping_error(ctx->ib_dev, 1620 tun_qp->tx_ring[i].buf.map)) { 1621 kfree(tun_qp->tx_ring[i].buf.addr); 1622 goto tx_err; 1623 } 1624 tun_qp->tx_ring[i].ah = NULL; 1625 } 1626 spin_lock_init(&tun_qp->tx_lock); 1627 tun_qp->tx_ix_head = 0; 1628 tun_qp->tx_ix_tail = 0; 1629 tun_qp->proxy_qpt = qp_type; 1630 1631 return 0; 1632 1633 tx_err: 1634 while (i > 0) { 1635 --i; 1636 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map, 1637 tx_buf_size, DMA_TO_DEVICE); 1638 kfree(tun_qp->tx_ring[i].buf.addr); 1639 } 1640 kfree(tun_qp->tx_ring); 1641 tun_qp->tx_ring = NULL; 1642 i = MLX4_NUM_TUNNEL_BUFS; 1643 err: 1644 while (i > 0) { 1645 --i; 1646 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map, 1647 rx_buf_size, DMA_FROM_DEVICE); 1648 kfree(tun_qp->ring[i].addr); 1649 } 1650 kfree(tun_qp->ring); 1651 tun_qp->ring = NULL; 1652 return -ENOMEM; 1653 } 1654 1655 static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx, 1656 enum ib_qp_type qp_type, int is_tun) 1657 { 1658 int i; 1659 struct mlx4_ib_demux_pv_qp *tun_qp; 1660 int rx_buf_size, tx_buf_size; 1661 1662 if (qp_type > IB_QPT_GSI) 1663 return; 1664 1665 tun_qp = &ctx->qp[qp_type]; 1666 if (is_tun) { 1667 rx_buf_size = sizeof (struct mlx4_tunnel_mad); 1668 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad); 1669 } else { 1670 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf); 1671 tx_buf_size = sizeof (struct mlx4_mad_snd_buf); 1672 } 1673 1674 1675 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1676 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map, 1677 rx_buf_size, DMA_FROM_DEVICE); 1678 kfree(tun_qp->ring[i].addr); 1679 } 1680 1681 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1682 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map, 1683 tx_buf_size, DMA_TO_DEVICE); 1684 kfree(tun_qp->tx_ring[i].buf.addr); 1685 if (tun_qp->tx_ring[i].ah) 1686 ib_destroy_ah(tun_qp->tx_ring[i].ah); 1687 } 1688 kfree(tun_qp->tx_ring); 1689 kfree(tun_qp->ring); 1690 } 1691 1692 static void mlx4_ib_tunnel_comp_worker(struct work_struct *work) 1693 { 1694 struct mlx4_ib_demux_pv_ctx *ctx; 1695 struct mlx4_ib_demux_pv_qp *tun_qp; 1696 struct ib_wc wc; 1697 int ret; 1698 ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work); 1699 ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); 1700 1701 while (ib_poll_cq(ctx->cq, 1, &wc) == 1) { 1702 tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)]; 1703 if (wc.status == IB_WC_SUCCESS) { 1704 switch (wc.opcode) { 1705 case IB_WC_RECV: 1706 mlx4_ib_multiplex_mad(ctx, &wc); 1707 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, 1708 wc.wr_id & 1709 (MLX4_NUM_TUNNEL_BUFS - 1)); 1710 if (ret) 1711 pr_err("Failed reposting tunnel " 1712 "buf:%lld\n", (unsigned long long)wc.wr_id); 1713 break; 1714 case IB_WC_SEND: 1715 pr_debug("received tunnel send completion:" 1716 "wrid=0x%llx, status=0x%x\n", 1717 (unsigned long long)wc.wr_id, wc.status); 1718 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id & 1719 (MLX4_NUM_TUNNEL_BUFS - 1)].ah); 1720 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1721 = NULL; 1722 spin_lock(&tun_qp->tx_lock); 1723 tun_qp->tx_ix_tail++; 1724 spin_unlock(&tun_qp->tx_lock); 1725 1726 break; 1727 default: 1728 break; 1729 } 1730 } else { 1731 pr_debug("mlx4_ib: completion error in tunnel: %d." 1732 " status = %d, wrid = 0x%llx\n", 1733 ctx->slave, wc.status, (unsigned long long)wc.wr_id); 1734 if (!MLX4_TUN_IS_RECV(wc.wr_id)) { 1735 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id & 1736 (MLX4_NUM_TUNNEL_BUFS - 1)].ah); 1737 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1738 = NULL; 1739 spin_lock(&tun_qp->tx_lock); 1740 tun_qp->tx_ix_tail++; 1741 spin_unlock(&tun_qp->tx_lock); 1742 } 1743 } 1744 } 1745 } 1746 1747 static void pv_qp_event_handler(struct ib_event *event, void *qp_context) 1748 { 1749 struct mlx4_ib_demux_pv_ctx *sqp = qp_context; 1750 1751 /* It's worse than that! He's dead, Jim! */ 1752 pr_err("Fatal error (%d) on a MAD QP on port %d\n", 1753 event->event, sqp->port); 1754 } 1755 1756 static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx, 1757 enum ib_qp_type qp_type, int create_tun) 1758 { 1759 int i, ret; 1760 struct mlx4_ib_demux_pv_qp *tun_qp; 1761 struct mlx4_ib_qp_tunnel_init_attr qp_init_attr; 1762 struct ib_qp_attr attr; 1763 int qp_attr_mask_INIT; 1764 1765 if (qp_type > IB_QPT_GSI) 1766 return -EINVAL; 1767 1768 tun_qp = &ctx->qp[qp_type]; 1769 1770 memset(&qp_init_attr, 0, sizeof qp_init_attr); 1771 qp_init_attr.init_attr.send_cq = ctx->cq; 1772 qp_init_attr.init_attr.recv_cq = ctx->cq; 1773 qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; 1774 qp_init_attr.init_attr.cap.max_send_wr = MLX4_NUM_TUNNEL_BUFS; 1775 qp_init_attr.init_attr.cap.max_recv_wr = MLX4_NUM_TUNNEL_BUFS; 1776 qp_init_attr.init_attr.cap.max_send_sge = 1; 1777 qp_init_attr.init_attr.cap.max_recv_sge = 1; 1778 if (create_tun) { 1779 qp_init_attr.init_attr.qp_type = IB_QPT_UD; 1780 qp_init_attr.init_attr.create_flags = 1781 (enum ib_qp_create_flags)MLX4_IB_SRIOV_TUNNEL_QP; 1782 qp_init_attr.port = ctx->port; 1783 qp_init_attr.slave = ctx->slave; 1784 qp_init_attr.proxy_qp_type = qp_type; 1785 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | 1786 IB_QP_QKEY | IB_QP_PORT; 1787 } else { 1788 qp_init_attr.init_attr.qp_type = qp_type; 1789 qp_init_attr.init_attr.create_flags = 1790 (enum ib_qp_create_flags)MLX4_IB_SRIOV_SQP; 1791 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY; 1792 } 1793 qp_init_attr.init_attr.port_num = ctx->port; 1794 qp_init_attr.init_attr.qp_context = ctx; 1795 qp_init_attr.init_attr.event_handler = pv_qp_event_handler; 1796 tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr); 1797 if (IS_ERR(tun_qp->qp)) { 1798 ret = PTR_ERR(tun_qp->qp); 1799 tun_qp->qp = NULL; 1800 pr_err("Couldn't create %s QP (%d)\n", 1801 create_tun ? "tunnel" : "special", ret); 1802 return ret; 1803 } 1804 1805 memset(&attr, 0, sizeof attr); 1806 attr.qp_state = IB_QPS_INIT; 1807 ret = 0; 1808 if (create_tun) 1809 ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave, 1810 ctx->port, IB_DEFAULT_PKEY_FULL, 1811 &attr.pkey_index); 1812 if (ret || !create_tun) 1813 attr.pkey_index = 1814 to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0]; 1815 attr.qkey = IB_QP1_QKEY; 1816 attr.port_num = ctx->port; 1817 ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT); 1818 if (ret) { 1819 pr_err("Couldn't change %s qp state to INIT (%d)\n", 1820 create_tun ? "tunnel" : "special", ret); 1821 goto err_qp; 1822 } 1823 attr.qp_state = IB_QPS_RTR; 1824 ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE); 1825 if (ret) { 1826 pr_err("Couldn't change %s qp state to RTR (%d)\n", 1827 create_tun ? "tunnel" : "special", ret); 1828 goto err_qp; 1829 } 1830 attr.qp_state = IB_QPS_RTS; 1831 attr.sq_psn = 0; 1832 ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN); 1833 if (ret) { 1834 pr_err("Couldn't change %s qp state to RTS (%d)\n", 1835 create_tun ? "tunnel" : "special", ret); 1836 goto err_qp; 1837 } 1838 1839 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1840 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i); 1841 if (ret) { 1842 pr_err(" mlx4_ib_post_pv_buf error" 1843 " (err = %d, i = %d)\n", ret, i); 1844 goto err_qp; 1845 } 1846 } 1847 return 0; 1848 1849 err_qp: 1850 ib_destroy_qp(tun_qp->qp); 1851 tun_qp->qp = NULL; 1852 return ret; 1853 } 1854 1855 /* 1856 * IB MAD completion callback for real SQPs 1857 */ 1858 static void mlx4_ib_sqp_comp_worker(struct work_struct *work) 1859 { 1860 struct mlx4_ib_demux_pv_ctx *ctx; 1861 struct mlx4_ib_demux_pv_qp *sqp; 1862 struct ib_wc wc; 1863 struct ib_grh *grh; 1864 struct ib_mad *mad; 1865 1866 ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work); 1867 ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); 1868 1869 while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) { 1870 sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)]; 1871 if (wc.status == IB_WC_SUCCESS) { 1872 switch (wc.opcode) { 1873 case IB_WC_SEND: 1874 ib_destroy_ah(sqp->tx_ring[wc.wr_id & 1875 (MLX4_NUM_TUNNEL_BUFS - 1)].ah); 1876 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1877 = NULL; 1878 spin_lock(&sqp->tx_lock); 1879 sqp->tx_ix_tail++; 1880 spin_unlock(&sqp->tx_lock); 1881 break; 1882 case IB_WC_RECV: 1883 mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *) 1884 (sqp->ring[wc.wr_id & 1885 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->payload); 1886 grh = &(((struct mlx4_mad_rcv_buf *) 1887 (sqp->ring[wc.wr_id & 1888 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->grh); 1889 mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad); 1890 if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id & 1891 (MLX4_NUM_TUNNEL_BUFS - 1))) 1892 pr_err("Failed reposting SQP " 1893 "buf:%lld\n", (unsigned long long)wc.wr_id); 1894 break; 1895 default: 1896 BUG_ON(1); 1897 break; 1898 } 1899 } else { 1900 pr_debug("mlx4_ib: completion error in tunnel: %d." 1901 " status = %d, wrid = 0x%llx\n", 1902 ctx->slave, wc.status, (unsigned long long)wc.wr_id); 1903 if (!MLX4_TUN_IS_RECV(wc.wr_id)) { 1904 ib_destroy_ah(sqp->tx_ring[wc.wr_id & 1905 (MLX4_NUM_TUNNEL_BUFS - 1)].ah); 1906 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1907 = NULL; 1908 spin_lock(&sqp->tx_lock); 1909 sqp->tx_ix_tail++; 1910 spin_unlock(&sqp->tx_lock); 1911 } 1912 } 1913 } 1914 } 1915 1916 static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port, 1917 struct mlx4_ib_demux_pv_ctx **ret_ctx) 1918 { 1919 struct mlx4_ib_demux_pv_ctx *ctx; 1920 1921 *ret_ctx = NULL; 1922 ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL); 1923 if (!ctx) { 1924 pr_err("failed allocating pv resource context " 1925 "for port %d, slave %d\n", port, slave); 1926 return -ENOMEM; 1927 } 1928 1929 ctx->ib_dev = &dev->ib_dev; 1930 ctx->port = port; 1931 ctx->slave = slave; 1932 *ret_ctx = ctx; 1933 return 0; 1934 } 1935 1936 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port) 1937 { 1938 if (dev->sriov.demux[port - 1].tun[slave]) { 1939 kfree(dev->sriov.demux[port - 1].tun[slave]); 1940 dev->sriov.demux[port - 1].tun[slave] = NULL; 1941 } 1942 } 1943 1944 static int create_pv_resources(struct ib_device *ibdev, int slave, int port, 1945 int create_tun, struct mlx4_ib_demux_pv_ctx *ctx) 1946 { 1947 int ret, cq_size; 1948 struct ib_cq_init_attr cq_attr = {}; 1949 1950 if (ctx->state != DEMUX_PV_STATE_DOWN) 1951 return -EEXIST; 1952 1953 ctx->state = DEMUX_PV_STATE_STARTING; 1954 /* have QP0 only if link layer is IB */ 1955 if (rdma_port_get_link_layer(ibdev, ctx->port) == 1956 IB_LINK_LAYER_INFINIBAND) 1957 ctx->has_smi = 1; 1958 1959 if (ctx->has_smi) { 1960 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun); 1961 if (ret) { 1962 pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret); 1963 goto err_out; 1964 } 1965 } 1966 1967 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun); 1968 if (ret) { 1969 pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret); 1970 goto err_out_qp0; 1971 } 1972 1973 cq_size = 2 * MLX4_NUM_TUNNEL_BUFS; 1974 if (ctx->has_smi) 1975 cq_size *= 2; 1976 1977 cq_attr.cqe = cq_size; 1978 ctx->cq = ib_create_cq(ctx->ib_dev, mlx4_ib_tunnel_comp_handler, 1979 NULL, ctx, &cq_attr); 1980 if (IS_ERR(ctx->cq)) { 1981 ret = PTR_ERR(ctx->cq); 1982 pr_err("Couldn't create tunnel CQ (%d)\n", ret); 1983 goto err_buf; 1984 } 1985 1986 ctx->pd = ib_alloc_pd(ctx->ib_dev, 0); 1987 if (IS_ERR(ctx->pd)) { 1988 ret = PTR_ERR(ctx->pd); 1989 pr_err("Couldn't create tunnel PD (%d)\n", ret); 1990 goto err_cq; 1991 } 1992 1993 if (ctx->has_smi) { 1994 ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun); 1995 if (ret) { 1996 pr_err("Couldn't create %s QP0 (%d)\n", 1997 create_tun ? "tunnel for" : "", ret); 1998 goto err_pd; 1999 } 2000 } 2001 2002 ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun); 2003 if (ret) { 2004 pr_err("Couldn't create %s QP1 (%d)\n", 2005 create_tun ? "tunnel for" : "", ret); 2006 goto err_qp0; 2007 } 2008 2009 if (create_tun) 2010 INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker); 2011 else 2012 INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker); 2013 2014 ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq; 2015 2016 ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); 2017 if (ret) { 2018 pr_err("Couldn't arm tunnel cq (%d)\n", ret); 2019 goto err_wq; 2020 } 2021 ctx->state = DEMUX_PV_STATE_ACTIVE; 2022 return 0; 2023 2024 err_wq: 2025 ctx->wq = NULL; 2026 ib_destroy_qp(ctx->qp[1].qp); 2027 ctx->qp[1].qp = NULL; 2028 2029 2030 err_qp0: 2031 if (ctx->has_smi) 2032 ib_destroy_qp(ctx->qp[0].qp); 2033 ctx->qp[0].qp = NULL; 2034 2035 err_pd: 2036 ib_dealloc_pd(ctx->pd); 2037 ctx->pd = NULL; 2038 2039 err_cq: 2040 ib_destroy_cq(ctx->cq); 2041 ctx->cq = NULL; 2042 2043 err_buf: 2044 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun); 2045 2046 err_out_qp0: 2047 if (ctx->has_smi) 2048 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun); 2049 err_out: 2050 ctx->state = DEMUX_PV_STATE_DOWN; 2051 return ret; 2052 } 2053 2054 static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port, 2055 struct mlx4_ib_demux_pv_ctx *ctx, int flush) 2056 { 2057 if (!ctx) 2058 return; 2059 if (ctx->state > DEMUX_PV_STATE_DOWN) { 2060 ctx->state = DEMUX_PV_STATE_DOWNING; 2061 if (flush) 2062 flush_workqueue(ctx->wq); 2063 if (ctx->has_smi) { 2064 ib_destroy_qp(ctx->qp[0].qp); 2065 ctx->qp[0].qp = NULL; 2066 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1); 2067 } 2068 ib_destroy_qp(ctx->qp[1].qp); 2069 ctx->qp[1].qp = NULL; 2070 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1); 2071 ib_dealloc_pd(ctx->pd); 2072 ctx->pd = NULL; 2073 ib_destroy_cq(ctx->cq); 2074 ctx->cq = NULL; 2075 ctx->state = DEMUX_PV_STATE_DOWN; 2076 } 2077 } 2078 2079 static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave, 2080 int port, int do_init) 2081 { 2082 int ret = 0; 2083 2084 if (!do_init) { 2085 clean_vf_mcast(&dev->sriov.demux[port - 1], slave); 2086 /* for master, destroy real sqp resources */ 2087 if (slave == mlx4_master_func_num(dev->dev)) 2088 destroy_pv_resources(dev, slave, port, 2089 dev->sriov.sqps[port - 1], 1); 2090 /* destroy the tunnel qp resources */ 2091 destroy_pv_resources(dev, slave, port, 2092 dev->sriov.demux[port - 1].tun[slave], 1); 2093 return 0; 2094 } 2095 2096 /* create the tunnel qp resources */ 2097 ret = create_pv_resources(&dev->ib_dev, slave, port, 1, 2098 dev->sriov.demux[port - 1].tun[slave]); 2099 2100 /* for master, create the real sqp resources */ 2101 if (!ret && slave == mlx4_master_func_num(dev->dev)) 2102 ret = create_pv_resources(&dev->ib_dev, slave, port, 0, 2103 dev->sriov.sqps[port - 1]); 2104 return ret; 2105 } 2106 2107 void mlx4_ib_tunnels_update_work(struct work_struct *work) 2108 { 2109 struct mlx4_ib_demux_work *dmxw; 2110 2111 dmxw = container_of(work, struct mlx4_ib_demux_work, work); 2112 mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port, 2113 dmxw->do_init); 2114 kfree(dmxw); 2115 return; 2116 } 2117 2118 static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev, 2119 struct mlx4_ib_demux_ctx *ctx, 2120 int port) 2121 { 2122 char name[12]; 2123 int ret = 0; 2124 int i; 2125 2126 ctx->tun = kcalloc(dev->dev->caps.sqp_demux, 2127 sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL); 2128 if (!ctx->tun) 2129 return -ENOMEM; 2130 2131 ctx->dev = dev; 2132 ctx->port = port; 2133 ctx->ib_dev = &dev->ib_dev; 2134 2135 for (i = 0; 2136 i < min(dev->dev->caps.sqp_demux, 2137 (u16)(dev->dev->persist->num_vfs + 1)); 2138 i++) { 2139 struct mlx4_active_ports actv_ports = 2140 mlx4_get_active_ports(dev->dev, i); 2141 2142 if (!test_bit(port - 1, actv_ports.ports)) 2143 continue; 2144 2145 ret = alloc_pv_object(dev, i, port, &ctx->tun[i]); 2146 if (ret) { 2147 ret = -ENOMEM; 2148 goto err_mcg; 2149 } 2150 } 2151 2152 ret = mlx4_ib_mcg_port_init(ctx); 2153 if (ret) { 2154 pr_err("Failed initializing mcg para-virt (%d)\n", ret); 2155 goto err_mcg; 2156 } 2157 2158 snprintf(name, sizeof name, "mlx4_ibt%d", port); 2159 ctx->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM); 2160 if (!ctx->wq) { 2161 pr_err("Failed to create tunnelling WQ for port %d\n", port); 2162 ret = -ENOMEM; 2163 goto err_wq; 2164 } 2165 2166 snprintf(name, sizeof name, "mlx4_ibud%d", port); 2167 ctx->ud_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM); 2168 if (!ctx->ud_wq) { 2169 pr_err("Failed to create up/down WQ for port %d\n", port); 2170 ret = -ENOMEM; 2171 goto err_udwq; 2172 } 2173 2174 return 0; 2175 2176 err_udwq: 2177 destroy_workqueue(ctx->wq); 2178 ctx->wq = NULL; 2179 2180 err_wq: 2181 mlx4_ib_mcg_port_cleanup(ctx, 1); 2182 err_mcg: 2183 for (i = 0; i < dev->dev->caps.sqp_demux; i++) 2184 free_pv_object(dev, i, port); 2185 kfree(ctx->tun); 2186 ctx->tun = NULL; 2187 return ret; 2188 } 2189 2190 static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx) 2191 { 2192 if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) { 2193 sqp_ctx->state = DEMUX_PV_STATE_DOWNING; 2194 flush_workqueue(sqp_ctx->wq); 2195 if (sqp_ctx->has_smi) { 2196 ib_destroy_qp(sqp_ctx->qp[0].qp); 2197 sqp_ctx->qp[0].qp = NULL; 2198 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0); 2199 } 2200 ib_destroy_qp(sqp_ctx->qp[1].qp); 2201 sqp_ctx->qp[1].qp = NULL; 2202 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0); 2203 ib_dealloc_pd(sqp_ctx->pd); 2204 sqp_ctx->pd = NULL; 2205 ib_destroy_cq(sqp_ctx->cq); 2206 sqp_ctx->cq = NULL; 2207 sqp_ctx->state = DEMUX_PV_STATE_DOWN; 2208 } 2209 } 2210 2211 static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx) 2212 { 2213 int i; 2214 if (ctx) { 2215 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 2216 mlx4_ib_mcg_port_cleanup(ctx, 1); 2217 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 2218 if (!ctx->tun[i]) 2219 continue; 2220 if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN) 2221 ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING; 2222 } 2223 flush_workqueue(ctx->wq); 2224 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 2225 destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0); 2226 free_pv_object(dev, i, ctx->port); 2227 } 2228 kfree(ctx->tun); 2229 destroy_workqueue(ctx->ud_wq); 2230 destroy_workqueue(ctx->wq); 2231 } 2232 } 2233 2234 static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init) 2235 { 2236 int i; 2237 2238 if (!mlx4_is_master(dev->dev)) 2239 return; 2240 /* initialize or tear down tunnel QPs for the master */ 2241 for (i = 0; i < dev->dev->caps.num_ports; i++) 2242 mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init); 2243 return; 2244 } 2245 2246 int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev) 2247 { 2248 int i = 0; 2249 int err; 2250 2251 if (!mlx4_is_mfunc(dev->dev)) 2252 return 0; 2253 2254 dev->sriov.is_going_down = 0; 2255 spin_lock_init(&dev->sriov.going_down_lock); 2256 mlx4_ib_cm_paravirt_init(dev); 2257 2258 mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n"); 2259 2260 if (mlx4_is_slave(dev->dev)) { 2261 mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n"); 2262 return 0; 2263 } 2264 2265 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 2266 if (i == mlx4_master_func_num(dev->dev)) 2267 mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid); 2268 else 2269 mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid()); 2270 } 2271 2272 err = mlx4_ib_init_alias_guid_service(dev); 2273 if (err) { 2274 mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n"); 2275 goto paravirt_err; 2276 } 2277 err = mlx4_ib_device_register_sysfs(dev); 2278 if (err) { 2279 mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n"); 2280 goto sysfs_err; 2281 } 2282 2283 mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n", 2284 dev->dev->caps.sqp_demux); 2285 for (i = 0; i < dev->num_ports; i++) { 2286 union ib_gid gid; 2287 err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1); 2288 if (err) 2289 goto demux_err; 2290 dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id; 2291 atomic64_set(&dev->sriov.demux[i].subnet_prefix, 2292 be64_to_cpu(gid.global.subnet_prefix)); 2293 err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1, 2294 &dev->sriov.sqps[i]); 2295 if (err) 2296 goto demux_err; 2297 err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1); 2298 if (err) 2299 goto free_pv; 2300 } 2301 mlx4_ib_master_tunnels(dev, 1); 2302 return 0; 2303 2304 free_pv: 2305 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1); 2306 demux_err: 2307 while (--i >= 0) { 2308 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1); 2309 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]); 2310 } 2311 mlx4_ib_device_unregister_sysfs(dev); 2312 2313 sysfs_err: 2314 mlx4_ib_destroy_alias_guid_service(dev); 2315 2316 paravirt_err: 2317 mlx4_ib_cm_paravirt_clean(dev, -1); 2318 2319 return err; 2320 } 2321 2322 void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev) 2323 { 2324 int i; 2325 unsigned long flags; 2326 2327 if (!mlx4_is_mfunc(dev->dev)) 2328 return; 2329 2330 spin_lock_irqsave(&dev->sriov.going_down_lock, flags); 2331 dev->sriov.is_going_down = 1; 2332 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags); 2333 if (mlx4_is_master(dev->dev)) { 2334 for (i = 0; i < dev->num_ports; i++) { 2335 flush_workqueue(dev->sriov.demux[i].ud_wq); 2336 mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]); 2337 kfree(dev->sriov.sqps[i]); 2338 dev->sriov.sqps[i] = NULL; 2339 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]); 2340 } 2341 2342 mlx4_ib_cm_paravirt_clean(dev, -1); 2343 mlx4_ib_destroy_alias_guid_service(dev); 2344 mlx4_ib_device_unregister_sysfs(dev); 2345 } 2346 } 2347