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 43 #include "mlx4_ib.h" 44 45 enum { 46 MLX4_IB_VENDOR_CLASS1 = 0x9, 47 MLX4_IB_VENDOR_CLASS2 = 0xa 48 }; 49 50 #define MLX4_TUN_SEND_WRID_SHIFT 34 51 #define MLX4_TUN_QPN_SHIFT 32 52 #define MLX4_TUN_WRID_RECV (((u64) 1) << MLX4_TUN_SEND_WRID_SHIFT) 53 #define MLX4_TUN_SET_WRID_QPN(a) (((u64) ((a) & 0x3)) << MLX4_TUN_QPN_SHIFT) 54 55 #define MLX4_TUN_IS_RECV(a) (((a) >> MLX4_TUN_SEND_WRID_SHIFT) & 0x1) 56 #define MLX4_TUN_WRID_QPN(a) (((a) >> MLX4_TUN_QPN_SHIFT) & 0x3) 57 58 /* Port mgmt change event handling */ 59 60 #define GET_BLK_PTR_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.block_ptr) 61 #define GET_MASK_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.tbl_entries_mask) 62 #define NUM_IDX_IN_PKEY_TBL_BLK 32 63 #define GUID_TBL_ENTRY_SIZE 8 /* size in bytes */ 64 #define GUID_TBL_BLK_NUM_ENTRIES 8 65 #define GUID_TBL_BLK_SIZE (GUID_TBL_ENTRY_SIZE * GUID_TBL_BLK_NUM_ENTRIES) 66 67 struct mlx4_mad_rcv_buf { 68 struct ib_grh grh; 69 u8 payload[256]; 70 } __packed; 71 72 struct mlx4_mad_snd_buf { 73 u8 payload[256]; 74 } __packed; 75 76 struct mlx4_tunnel_mad { 77 struct ib_grh grh; 78 struct mlx4_ib_tunnel_header hdr; 79 struct ib_mad mad; 80 } __packed; 81 82 struct mlx4_rcv_tunnel_mad { 83 struct mlx4_rcv_tunnel_hdr hdr; 84 struct ib_grh grh; 85 struct ib_mad mad; 86 } __packed; 87 88 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num); 89 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num); 90 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num, 91 int block, u32 change_bitmap); 92 93 __be64 mlx4_ib_gen_node_guid(void) 94 { 95 #define NODE_GUID_HI ((u64) (((u64)IB_OPENIB_OUI) << 40)) 96 return cpu_to_be64(NODE_GUID_HI | prandom_u32()); 97 } 98 99 __be64 mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx *ctx) 100 { 101 return cpu_to_be64(atomic_inc_return(&ctx->tid)) | 102 cpu_to_be64(0xff00000000000000LL); 103 } 104 105 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags, 106 int port, struct ib_wc *in_wc, struct ib_grh *in_grh, 107 void *in_mad, void *response_mad) 108 { 109 struct mlx4_cmd_mailbox *inmailbox, *outmailbox; 110 void *inbox; 111 int err; 112 u32 in_modifier = port; 113 u8 op_modifier = 0; 114 115 inmailbox = mlx4_alloc_cmd_mailbox(dev->dev); 116 if (IS_ERR(inmailbox)) 117 return PTR_ERR(inmailbox); 118 inbox = inmailbox->buf; 119 120 outmailbox = mlx4_alloc_cmd_mailbox(dev->dev); 121 if (IS_ERR(outmailbox)) { 122 mlx4_free_cmd_mailbox(dev->dev, inmailbox); 123 return PTR_ERR(outmailbox); 124 } 125 126 memcpy(inbox, in_mad, 256); 127 128 /* 129 * Key check traps can't be generated unless we have in_wc to 130 * tell us where to send the trap. 131 */ 132 if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_MKEY) || !in_wc) 133 op_modifier |= 0x1; 134 if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_BKEY) || !in_wc) 135 op_modifier |= 0x2; 136 if (mlx4_is_mfunc(dev->dev) && 137 (mad_ifc_flags & MLX4_MAD_IFC_NET_VIEW || in_wc)) 138 op_modifier |= 0x8; 139 140 if (in_wc) { 141 struct { 142 __be32 my_qpn; 143 u32 reserved1; 144 __be32 rqpn; 145 u8 sl; 146 u8 g_path; 147 u16 reserved2[2]; 148 __be16 pkey; 149 u32 reserved3[11]; 150 u8 grh[40]; 151 } *ext_info; 152 153 memset(inbox + 256, 0, 256); 154 ext_info = inbox + 256; 155 156 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num); 157 ext_info->rqpn = cpu_to_be32(in_wc->src_qp); 158 ext_info->sl = in_wc->sl << 4; 159 ext_info->g_path = in_wc->dlid_path_bits | 160 (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0); 161 ext_info->pkey = cpu_to_be16(in_wc->pkey_index); 162 163 if (in_grh) 164 memcpy(ext_info->grh, in_grh, 40); 165 166 op_modifier |= 0x4; 167 168 in_modifier |= in_wc->slid << 16; 169 } 170 171 err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier, 172 mlx4_is_master(dev->dev) ? (op_modifier & ~0x8) : op_modifier, 173 MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C, 174 (op_modifier & 0x8) ? MLX4_CMD_NATIVE : MLX4_CMD_WRAPPED); 175 176 if (!err) 177 memcpy(response_mad, outmailbox->buf, 256); 178 179 mlx4_free_cmd_mailbox(dev->dev, inmailbox); 180 mlx4_free_cmd_mailbox(dev->dev, outmailbox); 181 182 return err; 183 } 184 185 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl) 186 { 187 struct ib_ah *new_ah; 188 struct ib_ah_attr ah_attr; 189 unsigned long flags; 190 191 if (!dev->send_agent[port_num - 1][0]) 192 return; 193 194 memset(&ah_attr, 0, sizeof ah_attr); 195 ah_attr.dlid = lid; 196 ah_attr.sl = sl; 197 ah_attr.port_num = port_num; 198 199 new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd, 200 &ah_attr); 201 if (IS_ERR(new_ah)) 202 return; 203 204 spin_lock_irqsave(&dev->sm_lock, flags); 205 if (dev->sm_ah[port_num - 1]) 206 ib_destroy_ah(dev->sm_ah[port_num - 1]); 207 dev->sm_ah[port_num - 1] = new_ah; 208 spin_unlock_irqrestore(&dev->sm_lock, flags); 209 } 210 211 /* 212 * Snoop SM MADs for port info, GUID info, and P_Key table sets, so we can 213 * synthesize LID change, Client-Rereg, GID change, and P_Key change events. 214 */ 215 static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad, 216 u16 prev_lid) 217 { 218 struct ib_port_info *pinfo; 219 u16 lid; 220 __be16 *base; 221 u32 bn, pkey_change_bitmap; 222 int i; 223 224 225 struct mlx4_ib_dev *dev = to_mdev(ibdev); 226 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 227 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 228 mad->mad_hdr.method == IB_MGMT_METHOD_SET) 229 switch (mad->mad_hdr.attr_id) { 230 case IB_SMP_ATTR_PORT_INFO: 231 pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data; 232 lid = be16_to_cpu(pinfo->lid); 233 234 update_sm_ah(dev, port_num, 235 be16_to_cpu(pinfo->sm_lid), 236 pinfo->neighbormtu_mastersmsl & 0xf); 237 238 if (pinfo->clientrereg_resv_subnetto & 0x80) 239 handle_client_rereg_event(dev, port_num); 240 241 if (prev_lid != lid) 242 handle_lid_change_event(dev, port_num); 243 break; 244 245 case IB_SMP_ATTR_PKEY_TABLE: 246 if (!mlx4_is_mfunc(dev->dev)) { 247 mlx4_ib_dispatch_event(dev, port_num, 248 IB_EVENT_PKEY_CHANGE); 249 break; 250 } 251 252 /* at this point, we are running in the master. 253 * Slaves do not receive SMPs. 254 */ 255 bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod) & 0xFFFF; 256 base = (__be16 *) &(((struct ib_smp *)mad)->data[0]); 257 pkey_change_bitmap = 0; 258 for (i = 0; i < 32; i++) { 259 pr_debug("PKEY[%d] = x%x\n", 260 i + bn*32, be16_to_cpu(base[i])); 261 if (be16_to_cpu(base[i]) != 262 dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32]) { 263 pkey_change_bitmap |= (1 << i); 264 dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32] = 265 be16_to_cpu(base[i]); 266 } 267 } 268 pr_debug("PKEY Change event: port=%d, " 269 "block=0x%x, change_bitmap=0x%x\n", 270 port_num, bn, pkey_change_bitmap); 271 272 if (pkey_change_bitmap) { 273 mlx4_ib_dispatch_event(dev, port_num, 274 IB_EVENT_PKEY_CHANGE); 275 if (!dev->sriov.is_going_down) 276 __propagate_pkey_ev(dev, port_num, bn, 277 pkey_change_bitmap); 278 } 279 break; 280 281 case IB_SMP_ATTR_GUID_INFO: 282 /* paravirtualized master's guid is guid 0 -- does not change */ 283 if (!mlx4_is_master(dev->dev)) 284 mlx4_ib_dispatch_event(dev, port_num, 285 IB_EVENT_GID_CHANGE); 286 /*if master, notify relevant slaves*/ 287 if (mlx4_is_master(dev->dev) && 288 !dev->sriov.is_going_down) { 289 bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod); 290 mlx4_ib_update_cache_on_guid_change(dev, bn, port_num, 291 (u8 *)(&((struct ib_smp *)mad)->data)); 292 mlx4_ib_notify_slaves_on_guid_change(dev, bn, port_num, 293 (u8 *)(&((struct ib_smp *)mad)->data)); 294 } 295 break; 296 297 default: 298 break; 299 } 300 } 301 302 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num, 303 int block, u32 change_bitmap) 304 { 305 int i, ix, slave, err; 306 int have_event = 0; 307 308 for (slave = 0; slave < dev->dev->caps.sqp_demux; slave++) { 309 if (slave == mlx4_master_func_num(dev->dev)) 310 continue; 311 if (!mlx4_is_slave_active(dev->dev, slave)) 312 continue; 313 314 have_event = 0; 315 for (i = 0; i < 32; i++) { 316 if (!(change_bitmap & (1 << i))) 317 continue; 318 for (ix = 0; 319 ix < dev->dev->caps.pkey_table_len[port_num]; ix++) { 320 if (dev->pkeys.virt2phys_pkey[slave][port_num - 1] 321 [ix] == i + 32 * block) { 322 err = mlx4_gen_pkey_eqe(dev->dev, slave, port_num); 323 pr_debug("propagate_pkey_ev: slave %d," 324 " port %d, ix %d (%d)\n", 325 slave, port_num, ix, err); 326 have_event = 1; 327 break; 328 } 329 } 330 if (have_event) 331 break; 332 } 333 } 334 } 335 336 static void node_desc_override(struct ib_device *dev, 337 struct ib_mad *mad) 338 { 339 unsigned long flags; 340 341 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 342 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 343 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP && 344 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) { 345 spin_lock_irqsave(&to_mdev(dev)->sm_lock, flags); 346 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64); 347 spin_unlock_irqrestore(&to_mdev(dev)->sm_lock, flags); 348 } 349 } 350 351 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad) 352 { 353 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED; 354 struct ib_mad_send_buf *send_buf; 355 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn]; 356 int ret; 357 unsigned long flags; 358 359 if (agent) { 360 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR, 361 IB_MGMT_MAD_DATA, GFP_ATOMIC); 362 if (IS_ERR(send_buf)) 363 return; 364 /* 365 * We rely here on the fact that MLX QPs don't use the 366 * address handle after the send is posted (this is 367 * wrong following the IB spec strictly, but we know 368 * it's OK for our devices). 369 */ 370 spin_lock_irqsave(&dev->sm_lock, flags); 371 memcpy(send_buf->mad, mad, sizeof *mad); 372 if ((send_buf->ah = dev->sm_ah[port_num - 1])) 373 ret = ib_post_send_mad(send_buf, NULL); 374 else 375 ret = -EINVAL; 376 spin_unlock_irqrestore(&dev->sm_lock, flags); 377 378 if (ret) 379 ib_free_send_mad(send_buf); 380 } 381 } 382 383 static int mlx4_ib_demux_sa_handler(struct ib_device *ibdev, int port, int slave, 384 struct ib_sa_mad *sa_mad) 385 { 386 int ret = 0; 387 388 /* dispatch to different sa handlers */ 389 switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) { 390 case IB_SA_ATTR_MC_MEMBER_REC: 391 ret = mlx4_ib_mcg_demux_handler(ibdev, port, slave, sa_mad); 392 break; 393 default: 394 break; 395 } 396 return ret; 397 } 398 399 int mlx4_ib_find_real_gid(struct ib_device *ibdev, u8 port, __be64 guid) 400 { 401 struct mlx4_ib_dev *dev = to_mdev(ibdev); 402 int i; 403 404 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 405 if (dev->sriov.demux[port - 1].guid_cache[i] == guid) 406 return i; 407 } 408 return -1; 409 } 410 411 412 static int find_slave_port_pkey_ix(struct mlx4_ib_dev *dev, int slave, 413 u8 port, u16 pkey, u16 *ix) 414 { 415 int i, ret; 416 u8 unassigned_pkey_ix, pkey_ix, partial_ix = 0xFF; 417 u16 slot_pkey; 418 419 if (slave == mlx4_master_func_num(dev->dev)) 420 return ib_find_cached_pkey(&dev->ib_dev, port, pkey, ix); 421 422 unassigned_pkey_ix = dev->dev->phys_caps.pkey_phys_table_len[port] - 1; 423 424 for (i = 0; i < dev->dev->caps.pkey_table_len[port]; i++) { 425 if (dev->pkeys.virt2phys_pkey[slave][port - 1][i] == unassigned_pkey_ix) 426 continue; 427 428 pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][i]; 429 430 ret = ib_get_cached_pkey(&dev->ib_dev, port, pkey_ix, &slot_pkey); 431 if (ret) 432 continue; 433 if ((slot_pkey & 0x7FFF) == (pkey & 0x7FFF)) { 434 if (slot_pkey & 0x8000) { 435 *ix = (u16) pkey_ix; 436 return 0; 437 } else { 438 /* take first partial pkey index found */ 439 if (partial_ix == 0xFF) 440 partial_ix = pkey_ix; 441 } 442 } 443 } 444 445 if (partial_ix < 0xFF) { 446 *ix = (u16) partial_ix; 447 return 0; 448 } 449 450 return -EINVAL; 451 } 452 453 int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port, 454 enum ib_qp_type dest_qpt, struct ib_wc *wc, 455 struct ib_grh *grh, struct ib_mad *mad) 456 { 457 struct ib_sge list; 458 struct ib_send_wr wr, *bad_wr; 459 struct mlx4_ib_demux_pv_ctx *tun_ctx; 460 struct mlx4_ib_demux_pv_qp *tun_qp; 461 struct mlx4_rcv_tunnel_mad *tun_mad; 462 struct ib_ah_attr attr; 463 struct ib_ah *ah; 464 struct ib_qp *src_qp = NULL; 465 unsigned tun_tx_ix = 0; 466 int dqpn; 467 int ret = 0; 468 u16 tun_pkey_ix; 469 u16 cached_pkey; 470 471 if (dest_qpt > IB_QPT_GSI) 472 return -EINVAL; 473 474 tun_ctx = dev->sriov.demux[port-1].tun[slave]; 475 476 /* check if proxy qp created */ 477 if (!tun_ctx || tun_ctx->state != DEMUX_PV_STATE_ACTIVE) 478 return -EAGAIN; 479 480 /* QP0 forwarding only for Dom0 */ 481 if (!dest_qpt && (mlx4_master_func_num(dev->dev) != slave)) 482 return -EINVAL; 483 484 if (!dest_qpt) 485 tun_qp = &tun_ctx->qp[0]; 486 else 487 tun_qp = &tun_ctx->qp[1]; 488 489 /* compute P_Key index to put in tunnel header for slave */ 490 if (dest_qpt) { 491 u16 pkey_ix; 492 ret = ib_get_cached_pkey(&dev->ib_dev, port, wc->pkey_index, &cached_pkey); 493 if (ret) 494 return -EINVAL; 495 496 ret = find_slave_port_pkey_ix(dev, slave, port, cached_pkey, &pkey_ix); 497 if (ret) 498 return -EINVAL; 499 tun_pkey_ix = pkey_ix; 500 } else 501 tun_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0]; 502 503 dqpn = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave + port + (dest_qpt * 2) - 1; 504 505 /* get tunnel tx data buf for slave */ 506 src_qp = tun_qp->qp; 507 508 /* create ah. Just need an empty one with the port num for the post send. 509 * The driver will set the force loopback bit in post_send */ 510 memset(&attr, 0, sizeof attr); 511 attr.port_num = port; 512 ah = ib_create_ah(tun_ctx->pd, &attr); 513 if (IS_ERR(ah)) 514 return -ENOMEM; 515 516 /* allocate tunnel tx buf after pass failure returns */ 517 spin_lock(&tun_qp->tx_lock); 518 if (tun_qp->tx_ix_head - tun_qp->tx_ix_tail >= 519 (MLX4_NUM_TUNNEL_BUFS - 1)) 520 ret = -EAGAIN; 521 else 522 tun_tx_ix = (++tun_qp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1); 523 spin_unlock(&tun_qp->tx_lock); 524 if (ret) 525 goto out; 526 527 tun_mad = (struct mlx4_rcv_tunnel_mad *) (tun_qp->tx_ring[tun_tx_ix].buf.addr); 528 if (tun_qp->tx_ring[tun_tx_ix].ah) 529 ib_destroy_ah(tun_qp->tx_ring[tun_tx_ix].ah); 530 tun_qp->tx_ring[tun_tx_ix].ah = ah; 531 ib_dma_sync_single_for_cpu(&dev->ib_dev, 532 tun_qp->tx_ring[tun_tx_ix].buf.map, 533 sizeof (struct mlx4_rcv_tunnel_mad), 534 DMA_TO_DEVICE); 535 536 /* copy over to tunnel buffer */ 537 if (grh) 538 memcpy(&tun_mad->grh, grh, sizeof *grh); 539 memcpy(&tun_mad->mad, mad, sizeof *mad); 540 541 /* adjust tunnel data */ 542 tun_mad->hdr.pkey_index = cpu_to_be16(tun_pkey_ix); 543 tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12); 544 tun_mad->hdr.slid_mac_47_32 = cpu_to_be16(wc->slid); 545 tun_mad->hdr.flags_src_qp = cpu_to_be32(wc->src_qp & 0xFFFFFF); 546 tun_mad->hdr.g_ml_path = (grh && (wc->wc_flags & IB_WC_GRH)) ? 0x80 : 0; 547 548 ib_dma_sync_single_for_device(&dev->ib_dev, 549 tun_qp->tx_ring[tun_tx_ix].buf.map, 550 sizeof (struct mlx4_rcv_tunnel_mad), 551 DMA_TO_DEVICE); 552 553 list.addr = tun_qp->tx_ring[tun_tx_ix].buf.map; 554 list.length = sizeof (struct mlx4_rcv_tunnel_mad); 555 list.lkey = tun_ctx->mr->lkey; 556 557 wr.wr.ud.ah = ah; 558 wr.wr.ud.port_num = port; 559 wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; 560 wr.wr.ud.remote_qpn = dqpn; 561 wr.next = NULL; 562 wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt); 563 wr.sg_list = &list; 564 wr.num_sge = 1; 565 wr.opcode = IB_WR_SEND; 566 wr.send_flags = IB_SEND_SIGNALED; 567 568 ret = ib_post_send(src_qp, &wr, &bad_wr); 569 out: 570 if (ret) 571 ib_destroy_ah(ah); 572 return ret; 573 } 574 575 static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port, 576 struct ib_wc *wc, struct ib_grh *grh, 577 struct ib_mad *mad) 578 { 579 struct mlx4_ib_dev *dev = to_mdev(ibdev); 580 int err; 581 int slave; 582 u8 *slave_id; 583 584 /* Initially assume that this mad is for us */ 585 slave = mlx4_master_func_num(dev->dev); 586 587 /* See if the slave id is encoded in a response mad */ 588 if (mad->mad_hdr.method & 0x80) { 589 slave_id = (u8 *) &mad->mad_hdr.tid; 590 slave = *slave_id; 591 if (slave != 255) /*255 indicates the dom0*/ 592 *slave_id = 0; /* remap tid */ 593 } 594 595 /* If a grh is present, we demux according to it */ 596 if (wc->wc_flags & IB_WC_GRH) { 597 slave = mlx4_ib_find_real_gid(ibdev, port, grh->dgid.global.interface_id); 598 if (slave < 0) { 599 mlx4_ib_warn(ibdev, "failed matching grh\n"); 600 return -ENOENT; 601 } 602 } 603 /* Class-specific handling */ 604 switch (mad->mad_hdr.mgmt_class) { 605 case IB_MGMT_CLASS_SUBN_ADM: 606 if (mlx4_ib_demux_sa_handler(ibdev, port, slave, 607 (struct ib_sa_mad *) mad)) 608 return 0; 609 break; 610 case IB_MGMT_CLASS_CM: 611 if (mlx4_ib_demux_cm_handler(ibdev, port, &slave, mad)) 612 return 0; 613 break; 614 case IB_MGMT_CLASS_DEVICE_MGMT: 615 if (mad->mad_hdr.method != IB_MGMT_METHOD_GET_RESP) 616 return 0; 617 break; 618 default: 619 /* Drop unsupported classes for slaves in tunnel mode */ 620 if (slave != mlx4_master_func_num(dev->dev)) { 621 pr_debug("dropping unsupported ingress mad from class:%d " 622 "for slave:%d\n", mad->mad_hdr.mgmt_class, slave); 623 return 0; 624 } 625 } 626 /*make sure that no slave==255 was not handled yet.*/ 627 if (slave >= dev->dev->caps.sqp_demux) { 628 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n", 629 slave, dev->dev->caps.sqp_demux); 630 return -ENOENT; 631 } 632 633 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad); 634 if (err) 635 pr_debug("failed sending to slave %d via tunnel qp (%d)\n", 636 slave, err); 637 return 0; 638 } 639 640 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 641 struct ib_wc *in_wc, struct ib_grh *in_grh, 642 struct ib_mad *in_mad, struct ib_mad *out_mad) 643 { 644 u16 slid, prev_lid = 0; 645 int err; 646 struct ib_port_attr pattr; 647 648 if (in_wc && in_wc->qp->qp_num) { 649 pr_debug("received MAD: slid:%d sqpn:%d " 650 "dlid_bits:%d dqpn:%d wc_flags:0x%x, cls %x, mtd %x, atr %x\n", 651 in_wc->slid, in_wc->src_qp, 652 in_wc->dlid_path_bits, 653 in_wc->qp->qp_num, 654 in_wc->wc_flags, 655 in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method, 656 be16_to_cpu(in_mad->mad_hdr.attr_id)); 657 if (in_wc->wc_flags & IB_WC_GRH) { 658 pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n", 659 be64_to_cpu(in_grh->sgid.global.subnet_prefix), 660 be64_to_cpu(in_grh->sgid.global.interface_id)); 661 pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n", 662 be64_to_cpu(in_grh->dgid.global.subnet_prefix), 663 be64_to_cpu(in_grh->dgid.global.interface_id)); 664 } 665 } 666 667 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); 668 669 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) { 670 forward_trap(to_mdev(ibdev), port_num, in_mad); 671 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 672 } 673 674 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 675 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { 676 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 677 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET && 678 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS) 679 return IB_MAD_RESULT_SUCCESS; 680 681 /* 682 * Don't process SMInfo queries -- the SMA can't handle them. 683 */ 684 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO) 685 return IB_MAD_RESULT_SUCCESS; 686 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT || 687 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 || 688 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 || 689 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) { 690 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET && 691 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET) 692 return IB_MAD_RESULT_SUCCESS; 693 } else 694 return IB_MAD_RESULT_SUCCESS; 695 696 if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || 697 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && 698 in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && 699 in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && 700 !ib_query_port(ibdev, port_num, &pattr)) 701 prev_lid = pattr.lid; 702 703 err = mlx4_MAD_IFC(to_mdev(ibdev), 704 (mad_flags & IB_MAD_IGNORE_MKEY ? MLX4_MAD_IFC_IGNORE_MKEY : 0) | 705 (mad_flags & IB_MAD_IGNORE_BKEY ? MLX4_MAD_IFC_IGNORE_BKEY : 0) | 706 MLX4_MAD_IFC_NET_VIEW, 707 port_num, in_wc, in_grh, in_mad, out_mad); 708 if (err) 709 return IB_MAD_RESULT_FAILURE; 710 711 if (!out_mad->mad_hdr.status) { 712 if (!(to_mdev(ibdev)->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)) 713 smp_snoop(ibdev, port_num, in_mad, prev_lid); 714 /* slaves get node desc from FW */ 715 if (!mlx4_is_slave(to_mdev(ibdev)->dev)) 716 node_desc_override(ibdev, out_mad); 717 } 718 719 /* set return bit in status of directed route responses */ 720 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) 721 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15); 722 723 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS) 724 /* no response for trap repress */ 725 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED; 726 727 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 728 } 729 730 static void edit_counter(struct mlx4_counter *cnt, 731 struct ib_pma_portcounters *pma_cnt) 732 { 733 pma_cnt->port_xmit_data = cpu_to_be32((be64_to_cpu(cnt->tx_bytes)>>2)); 734 pma_cnt->port_rcv_data = cpu_to_be32((be64_to_cpu(cnt->rx_bytes)>>2)); 735 pma_cnt->port_xmit_packets = cpu_to_be32(be64_to_cpu(cnt->tx_frames)); 736 pma_cnt->port_rcv_packets = cpu_to_be32(be64_to_cpu(cnt->rx_frames)); 737 } 738 739 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 740 struct ib_wc *in_wc, struct ib_grh *in_grh, 741 struct ib_mad *in_mad, struct ib_mad *out_mad) 742 { 743 struct mlx4_cmd_mailbox *mailbox; 744 struct mlx4_ib_dev *dev = to_mdev(ibdev); 745 int err; 746 u32 inmod = dev->counters[port_num - 1] & 0xffff; 747 u8 mode; 748 749 if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT) 750 return -EINVAL; 751 752 mailbox = mlx4_alloc_cmd_mailbox(dev->dev); 753 if (IS_ERR(mailbox)) 754 return IB_MAD_RESULT_FAILURE; 755 756 err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0, 757 MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C, 758 MLX4_CMD_WRAPPED); 759 if (err) 760 err = IB_MAD_RESULT_FAILURE; 761 else { 762 memset(out_mad->data, 0, sizeof out_mad->data); 763 mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode; 764 switch (mode & 0xf) { 765 case 0: 766 edit_counter(mailbox->buf, 767 (void *)(out_mad->data + 40)); 768 err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 769 break; 770 default: 771 err = IB_MAD_RESULT_FAILURE; 772 } 773 } 774 775 mlx4_free_cmd_mailbox(dev->dev, mailbox); 776 777 return err; 778 } 779 780 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, 781 struct ib_wc *in_wc, struct ib_grh *in_grh, 782 struct ib_mad *in_mad, struct ib_mad *out_mad) 783 { 784 switch (rdma_port_get_link_layer(ibdev, port_num)) { 785 case IB_LINK_LAYER_INFINIBAND: 786 return ib_process_mad(ibdev, mad_flags, port_num, in_wc, 787 in_grh, in_mad, out_mad); 788 case IB_LINK_LAYER_ETHERNET: 789 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc, 790 in_grh, in_mad, out_mad); 791 default: 792 return -EINVAL; 793 } 794 } 795 796 static void send_handler(struct ib_mad_agent *agent, 797 struct ib_mad_send_wc *mad_send_wc) 798 { 799 if (mad_send_wc->send_buf->context[0]) 800 ib_destroy_ah(mad_send_wc->send_buf->context[0]); 801 ib_free_send_mad(mad_send_wc->send_buf); 802 } 803 804 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev) 805 { 806 struct ib_mad_agent *agent; 807 int p, q; 808 int ret; 809 enum rdma_link_layer ll; 810 811 for (p = 0; p < dev->num_ports; ++p) { 812 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1); 813 for (q = 0; q <= 1; ++q) { 814 if (ll == IB_LINK_LAYER_INFINIBAND) { 815 agent = ib_register_mad_agent(&dev->ib_dev, p + 1, 816 q ? IB_QPT_GSI : IB_QPT_SMI, 817 NULL, 0, send_handler, 818 NULL, NULL); 819 if (IS_ERR(agent)) { 820 ret = PTR_ERR(agent); 821 goto err; 822 } 823 dev->send_agent[p][q] = agent; 824 } else 825 dev->send_agent[p][q] = NULL; 826 } 827 } 828 829 return 0; 830 831 err: 832 for (p = 0; p < dev->num_ports; ++p) 833 for (q = 0; q <= 1; ++q) 834 if (dev->send_agent[p][q]) 835 ib_unregister_mad_agent(dev->send_agent[p][q]); 836 837 return ret; 838 } 839 840 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev) 841 { 842 struct ib_mad_agent *agent; 843 int p, q; 844 845 for (p = 0; p < dev->num_ports; ++p) { 846 for (q = 0; q <= 1; ++q) { 847 agent = dev->send_agent[p][q]; 848 if (agent) { 849 dev->send_agent[p][q] = NULL; 850 ib_unregister_mad_agent(agent); 851 } 852 } 853 854 if (dev->sm_ah[p]) 855 ib_destroy_ah(dev->sm_ah[p]); 856 } 857 } 858 859 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num) 860 { 861 mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_LID_CHANGE); 862 863 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down) 864 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num, 865 MLX4_EQ_PORT_INFO_LID_CHANGE_MASK); 866 } 867 868 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num) 869 { 870 /* re-configure the alias-guid and mcg's */ 871 if (mlx4_is_master(dev->dev)) { 872 mlx4_ib_invalidate_all_guid_record(dev, port_num); 873 874 if (!dev->sriov.is_going_down) { 875 mlx4_ib_mcg_port_cleanup(&dev->sriov.demux[port_num - 1], 0); 876 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num, 877 MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK); 878 } 879 } 880 mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_CLIENT_REREGISTER); 881 } 882 883 static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num, 884 struct mlx4_eqe *eqe) 885 { 886 __propagate_pkey_ev(dev, port_num, GET_BLK_PTR_FROM_EQE(eqe), 887 GET_MASK_FROM_EQE(eqe)); 888 } 889 890 static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num, 891 u32 guid_tbl_blk_num, u32 change_bitmap) 892 { 893 struct ib_smp *in_mad = NULL; 894 struct ib_smp *out_mad = NULL; 895 u16 i; 896 897 if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev)) 898 return; 899 900 in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL); 901 out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL); 902 if (!in_mad || !out_mad) { 903 mlx4_ib_warn(&dev->ib_dev, "failed to allocate memory for guid info mads\n"); 904 goto out; 905 } 906 907 guid_tbl_blk_num *= 4; 908 909 for (i = 0; i < 4; i++) { 910 if (change_bitmap && (!((change_bitmap >> (8 * i)) & 0xff))) 911 continue; 912 memset(in_mad, 0, sizeof *in_mad); 913 memset(out_mad, 0, sizeof *out_mad); 914 915 in_mad->base_version = 1; 916 in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED; 917 in_mad->class_version = 1; 918 in_mad->method = IB_MGMT_METHOD_GET; 919 in_mad->attr_id = IB_SMP_ATTR_GUID_INFO; 920 in_mad->attr_mod = cpu_to_be32(guid_tbl_blk_num + i); 921 922 if (mlx4_MAD_IFC(dev, 923 MLX4_MAD_IFC_IGNORE_KEYS | MLX4_MAD_IFC_NET_VIEW, 924 port_num, NULL, NULL, in_mad, out_mad)) { 925 mlx4_ib_warn(&dev->ib_dev, "Failed in get GUID INFO MAD_IFC\n"); 926 goto out; 927 } 928 929 mlx4_ib_update_cache_on_guid_change(dev, guid_tbl_blk_num + i, 930 port_num, 931 (u8 *)(&((struct ib_smp *)out_mad)->data)); 932 mlx4_ib_notify_slaves_on_guid_change(dev, guid_tbl_blk_num + i, 933 port_num, 934 (u8 *)(&((struct ib_smp *)out_mad)->data)); 935 } 936 937 out: 938 kfree(in_mad); 939 kfree(out_mad); 940 return; 941 } 942 943 void handle_port_mgmt_change_event(struct work_struct *work) 944 { 945 struct ib_event_work *ew = container_of(work, struct ib_event_work, work); 946 struct mlx4_ib_dev *dev = ew->ib_dev; 947 struct mlx4_eqe *eqe = &(ew->ib_eqe); 948 u8 port = eqe->event.port_mgmt_change.port; 949 u32 changed_attr; 950 u32 tbl_block; 951 u32 change_bitmap; 952 953 switch (eqe->subtype) { 954 case MLX4_DEV_PMC_SUBTYPE_PORT_INFO: 955 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr); 956 957 /* Update the SM ah - This should be done before handling 958 the other changed attributes so that MADs can be sent to the SM */ 959 if (changed_attr & MSTR_SM_CHANGE_MASK) { 960 u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid); 961 u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf; 962 update_sm_ah(dev, port, lid, sl); 963 } 964 965 /* Check if it is a lid change event */ 966 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK) 967 handle_lid_change_event(dev, port); 968 969 /* Generate GUID changed event */ 970 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) { 971 mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE); 972 /*if master, notify all slaves*/ 973 if (mlx4_is_master(dev->dev)) 974 mlx4_gen_slaves_port_mgt_ev(dev->dev, port, 975 MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK); 976 } 977 978 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK) 979 handle_client_rereg_event(dev, port); 980 break; 981 982 case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE: 983 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE); 984 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down) 985 propagate_pkey_ev(dev, port, eqe); 986 break; 987 case MLX4_DEV_PMC_SUBTYPE_GUID_INFO: 988 /* paravirtualized master's guid is guid 0 -- does not change */ 989 if (!mlx4_is_master(dev->dev)) 990 mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE); 991 /*if master, notify relevant slaves*/ 992 else if (!dev->sriov.is_going_down) { 993 tbl_block = GET_BLK_PTR_FROM_EQE(eqe); 994 change_bitmap = GET_MASK_FROM_EQE(eqe); 995 handle_slaves_guid_change(dev, port, tbl_block, change_bitmap); 996 } 997 break; 998 default: 999 pr_warn("Unsupported subtype 0x%x for " 1000 "Port Management Change event\n", eqe->subtype); 1001 } 1002 1003 kfree(ew); 1004 } 1005 1006 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num, 1007 enum ib_event_type type) 1008 { 1009 struct ib_event event; 1010 1011 event.device = &dev->ib_dev; 1012 event.element.port_num = port_num; 1013 event.event = type; 1014 1015 ib_dispatch_event(&event); 1016 } 1017 1018 static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg) 1019 { 1020 unsigned long flags; 1021 struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context; 1022 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 1023 spin_lock_irqsave(&dev->sriov.going_down_lock, flags); 1024 if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE) 1025 queue_work(ctx->wq, &ctx->work); 1026 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags); 1027 } 1028 1029 static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx, 1030 struct mlx4_ib_demux_pv_qp *tun_qp, 1031 int index) 1032 { 1033 struct ib_sge sg_list; 1034 struct ib_recv_wr recv_wr, *bad_recv_wr; 1035 int size; 1036 1037 size = (tun_qp->qp->qp_type == IB_QPT_UD) ? 1038 sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf); 1039 1040 sg_list.addr = tun_qp->ring[index].map; 1041 sg_list.length = size; 1042 sg_list.lkey = ctx->mr->lkey; 1043 1044 recv_wr.next = NULL; 1045 recv_wr.sg_list = &sg_list; 1046 recv_wr.num_sge = 1; 1047 recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV | 1048 MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt); 1049 ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map, 1050 size, DMA_FROM_DEVICE); 1051 return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr); 1052 } 1053 1054 static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port, 1055 int slave, struct ib_sa_mad *sa_mad) 1056 { 1057 int ret = 0; 1058 1059 /* dispatch to different sa handlers */ 1060 switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) { 1061 case IB_SA_ATTR_MC_MEMBER_REC: 1062 ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad); 1063 break; 1064 default: 1065 break; 1066 } 1067 return ret; 1068 } 1069 1070 static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave) 1071 { 1072 int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave; 1073 1074 return (qpn >= proxy_start && qpn <= proxy_start + 1); 1075 } 1076 1077 1078 int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u8 port, 1079 enum ib_qp_type dest_qpt, u16 pkey_index, u32 remote_qpn, 1080 u32 qkey, struct ib_ah_attr *attr, struct ib_mad *mad) 1081 { 1082 struct ib_sge list; 1083 struct ib_send_wr wr, *bad_wr; 1084 struct mlx4_ib_demux_pv_ctx *sqp_ctx; 1085 struct mlx4_ib_demux_pv_qp *sqp; 1086 struct mlx4_mad_snd_buf *sqp_mad; 1087 struct ib_ah *ah; 1088 struct ib_qp *send_qp = NULL; 1089 unsigned wire_tx_ix = 0; 1090 int ret = 0; 1091 u16 wire_pkey_ix; 1092 int src_qpnum; 1093 u8 sgid_index; 1094 1095 1096 sqp_ctx = dev->sriov.sqps[port-1]; 1097 1098 /* check if proxy qp created */ 1099 if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE) 1100 return -EAGAIN; 1101 1102 /* QP0 forwarding only for Dom0 */ 1103 if (dest_qpt == IB_QPT_SMI && (mlx4_master_func_num(dev->dev) != slave)) 1104 return -EINVAL; 1105 1106 if (dest_qpt == IB_QPT_SMI) { 1107 src_qpnum = 0; 1108 sqp = &sqp_ctx->qp[0]; 1109 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0]; 1110 } else { 1111 src_qpnum = 1; 1112 sqp = &sqp_ctx->qp[1]; 1113 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index]; 1114 } 1115 1116 send_qp = sqp->qp; 1117 1118 /* create ah */ 1119 sgid_index = attr->grh.sgid_index; 1120 attr->grh.sgid_index = 0; 1121 ah = ib_create_ah(sqp_ctx->pd, attr); 1122 if (IS_ERR(ah)) 1123 return -ENOMEM; 1124 attr->grh.sgid_index = sgid_index; 1125 to_mah(ah)->av.ib.gid_index = sgid_index; 1126 /* get rid of force-loopback bit */ 1127 to_mah(ah)->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF); 1128 spin_lock(&sqp->tx_lock); 1129 if (sqp->tx_ix_head - sqp->tx_ix_tail >= 1130 (MLX4_NUM_TUNNEL_BUFS - 1)) 1131 ret = -EAGAIN; 1132 else 1133 wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1); 1134 spin_unlock(&sqp->tx_lock); 1135 if (ret) 1136 goto out; 1137 1138 sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr); 1139 if (sqp->tx_ring[wire_tx_ix].ah) 1140 ib_destroy_ah(sqp->tx_ring[wire_tx_ix].ah); 1141 sqp->tx_ring[wire_tx_ix].ah = ah; 1142 ib_dma_sync_single_for_cpu(&dev->ib_dev, 1143 sqp->tx_ring[wire_tx_ix].buf.map, 1144 sizeof (struct mlx4_mad_snd_buf), 1145 DMA_TO_DEVICE); 1146 1147 memcpy(&sqp_mad->payload, mad, sizeof *mad); 1148 1149 ib_dma_sync_single_for_device(&dev->ib_dev, 1150 sqp->tx_ring[wire_tx_ix].buf.map, 1151 sizeof (struct mlx4_mad_snd_buf), 1152 DMA_TO_DEVICE); 1153 1154 list.addr = sqp->tx_ring[wire_tx_ix].buf.map; 1155 list.length = sizeof (struct mlx4_mad_snd_buf); 1156 list.lkey = sqp_ctx->mr->lkey; 1157 1158 wr.wr.ud.ah = ah; 1159 wr.wr.ud.port_num = port; 1160 wr.wr.ud.pkey_index = wire_pkey_ix; 1161 wr.wr.ud.remote_qkey = qkey; 1162 wr.wr.ud.remote_qpn = remote_qpn; 1163 wr.next = NULL; 1164 wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum); 1165 wr.sg_list = &list; 1166 wr.num_sge = 1; 1167 wr.opcode = IB_WR_SEND; 1168 wr.send_flags = IB_SEND_SIGNALED; 1169 1170 ret = ib_post_send(send_qp, &wr, &bad_wr); 1171 out: 1172 if (ret) 1173 ib_destroy_ah(ah); 1174 return ret; 1175 } 1176 1177 static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc) 1178 { 1179 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 1180 struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)]; 1181 int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1); 1182 struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr; 1183 struct mlx4_ib_ah ah; 1184 struct ib_ah_attr ah_attr; 1185 u8 *slave_id; 1186 int slave; 1187 1188 /* Get slave that sent this packet */ 1189 if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn || 1190 wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX || 1191 (wc->src_qp & 0x1) != ctx->port - 1 || 1192 wc->src_qp & 0x4) { 1193 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp); 1194 return; 1195 } 1196 slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8; 1197 if (slave != ctx->slave) { 1198 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: " 1199 "belongs to another slave\n", wc->src_qp); 1200 return; 1201 } 1202 if (slave != mlx4_master_func_num(dev->dev) && !(wc->src_qp & 0x2)) { 1203 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: " 1204 "non-master trying to send QP0 packets\n", wc->src_qp); 1205 return; 1206 } 1207 1208 /* Map transaction ID */ 1209 ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map, 1210 sizeof (struct mlx4_tunnel_mad), 1211 DMA_FROM_DEVICE); 1212 switch (tunnel->mad.mad_hdr.method) { 1213 case IB_MGMT_METHOD_SET: 1214 case IB_MGMT_METHOD_GET: 1215 case IB_MGMT_METHOD_REPORT: 1216 case IB_SA_METHOD_GET_TABLE: 1217 case IB_SA_METHOD_DELETE: 1218 case IB_SA_METHOD_GET_MULTI: 1219 case IB_SA_METHOD_GET_TRACE_TBL: 1220 slave_id = (u8 *) &tunnel->mad.mad_hdr.tid; 1221 if (*slave_id) { 1222 mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d " 1223 "class:%d slave:%d\n", *slave_id, 1224 tunnel->mad.mad_hdr.mgmt_class, slave); 1225 return; 1226 } else 1227 *slave_id = slave; 1228 default: 1229 /* nothing */; 1230 } 1231 1232 /* Class-specific handling */ 1233 switch (tunnel->mad.mad_hdr.mgmt_class) { 1234 case IB_MGMT_CLASS_SUBN_ADM: 1235 if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave, 1236 (struct ib_sa_mad *) &tunnel->mad)) 1237 return; 1238 break; 1239 case IB_MGMT_CLASS_CM: 1240 if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave, 1241 (struct ib_mad *) &tunnel->mad)) 1242 return; 1243 break; 1244 case IB_MGMT_CLASS_DEVICE_MGMT: 1245 if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET && 1246 tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET) 1247 return; 1248 break; 1249 default: 1250 /* Drop unsupported classes for slaves in tunnel mode */ 1251 if (slave != mlx4_master_func_num(dev->dev)) { 1252 mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d " 1253 "for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave); 1254 return; 1255 } 1256 } 1257 1258 /* We are using standard ib_core services to send the mad, so generate a 1259 * stadard address handle by decoding the tunnelled mlx4_ah fields */ 1260 memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av)); 1261 ah.ibah.device = ctx->ib_dev; 1262 mlx4_ib_query_ah(&ah.ibah, &ah_attr); 1263 if ((ah_attr.ah_flags & IB_AH_GRH) && 1264 (ah_attr.grh.sgid_index != slave)) { 1265 mlx4_ib_warn(ctx->ib_dev, "slave:%d accessed invalid sgid_index:%d\n", 1266 slave, ah_attr.grh.sgid_index); 1267 return; 1268 } 1269 1270 mlx4_ib_send_to_wire(dev, slave, ctx->port, 1271 is_proxy_qp0(dev, wc->src_qp, slave) ? 1272 IB_QPT_SMI : IB_QPT_GSI, 1273 be16_to_cpu(tunnel->hdr.pkey_index), 1274 be32_to_cpu(tunnel->hdr.remote_qpn), 1275 be32_to_cpu(tunnel->hdr.qkey), 1276 &ah_attr, &tunnel->mad); 1277 } 1278 1279 static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx, 1280 enum ib_qp_type qp_type, int is_tun) 1281 { 1282 int i; 1283 struct mlx4_ib_demux_pv_qp *tun_qp; 1284 int rx_buf_size, tx_buf_size; 1285 1286 if (qp_type > IB_QPT_GSI) 1287 return -EINVAL; 1288 1289 tun_qp = &ctx->qp[qp_type]; 1290 1291 tun_qp->ring = kzalloc(sizeof (struct mlx4_ib_buf) * MLX4_NUM_TUNNEL_BUFS, 1292 GFP_KERNEL); 1293 if (!tun_qp->ring) 1294 return -ENOMEM; 1295 1296 tun_qp->tx_ring = kcalloc(MLX4_NUM_TUNNEL_BUFS, 1297 sizeof (struct mlx4_ib_tun_tx_buf), 1298 GFP_KERNEL); 1299 if (!tun_qp->tx_ring) { 1300 kfree(tun_qp->ring); 1301 tun_qp->ring = NULL; 1302 return -ENOMEM; 1303 } 1304 1305 if (is_tun) { 1306 rx_buf_size = sizeof (struct mlx4_tunnel_mad); 1307 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad); 1308 } else { 1309 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf); 1310 tx_buf_size = sizeof (struct mlx4_mad_snd_buf); 1311 } 1312 1313 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1314 tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL); 1315 if (!tun_qp->ring[i].addr) 1316 goto err; 1317 tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev, 1318 tun_qp->ring[i].addr, 1319 rx_buf_size, 1320 DMA_FROM_DEVICE); 1321 } 1322 1323 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1324 tun_qp->tx_ring[i].buf.addr = 1325 kmalloc(tx_buf_size, GFP_KERNEL); 1326 if (!tun_qp->tx_ring[i].buf.addr) 1327 goto tx_err; 1328 tun_qp->tx_ring[i].buf.map = 1329 ib_dma_map_single(ctx->ib_dev, 1330 tun_qp->tx_ring[i].buf.addr, 1331 tx_buf_size, 1332 DMA_TO_DEVICE); 1333 tun_qp->tx_ring[i].ah = NULL; 1334 } 1335 spin_lock_init(&tun_qp->tx_lock); 1336 tun_qp->tx_ix_head = 0; 1337 tun_qp->tx_ix_tail = 0; 1338 tun_qp->proxy_qpt = qp_type; 1339 1340 return 0; 1341 1342 tx_err: 1343 while (i > 0) { 1344 --i; 1345 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map, 1346 tx_buf_size, DMA_TO_DEVICE); 1347 kfree(tun_qp->tx_ring[i].buf.addr); 1348 } 1349 kfree(tun_qp->tx_ring); 1350 tun_qp->tx_ring = NULL; 1351 i = MLX4_NUM_TUNNEL_BUFS; 1352 err: 1353 while (i > 0) { 1354 --i; 1355 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map, 1356 rx_buf_size, DMA_FROM_DEVICE); 1357 kfree(tun_qp->ring[i].addr); 1358 } 1359 kfree(tun_qp->ring); 1360 tun_qp->ring = NULL; 1361 return -ENOMEM; 1362 } 1363 1364 static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx, 1365 enum ib_qp_type qp_type, int is_tun) 1366 { 1367 int i; 1368 struct mlx4_ib_demux_pv_qp *tun_qp; 1369 int rx_buf_size, tx_buf_size; 1370 1371 if (qp_type > IB_QPT_GSI) 1372 return; 1373 1374 tun_qp = &ctx->qp[qp_type]; 1375 if (is_tun) { 1376 rx_buf_size = sizeof (struct mlx4_tunnel_mad); 1377 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad); 1378 } else { 1379 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf); 1380 tx_buf_size = sizeof (struct mlx4_mad_snd_buf); 1381 } 1382 1383 1384 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1385 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map, 1386 rx_buf_size, DMA_FROM_DEVICE); 1387 kfree(tun_qp->ring[i].addr); 1388 } 1389 1390 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1391 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map, 1392 tx_buf_size, DMA_TO_DEVICE); 1393 kfree(tun_qp->tx_ring[i].buf.addr); 1394 if (tun_qp->tx_ring[i].ah) 1395 ib_destroy_ah(tun_qp->tx_ring[i].ah); 1396 } 1397 kfree(tun_qp->tx_ring); 1398 kfree(tun_qp->ring); 1399 } 1400 1401 static void mlx4_ib_tunnel_comp_worker(struct work_struct *work) 1402 { 1403 struct mlx4_ib_demux_pv_ctx *ctx; 1404 struct mlx4_ib_demux_pv_qp *tun_qp; 1405 struct ib_wc wc; 1406 int ret; 1407 ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work); 1408 ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); 1409 1410 while (ib_poll_cq(ctx->cq, 1, &wc) == 1) { 1411 tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)]; 1412 if (wc.status == IB_WC_SUCCESS) { 1413 switch (wc.opcode) { 1414 case IB_WC_RECV: 1415 mlx4_ib_multiplex_mad(ctx, &wc); 1416 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, 1417 wc.wr_id & 1418 (MLX4_NUM_TUNNEL_BUFS - 1)); 1419 if (ret) 1420 pr_err("Failed reposting tunnel " 1421 "buf:%lld\n", wc.wr_id); 1422 break; 1423 case IB_WC_SEND: 1424 pr_debug("received tunnel send completion:" 1425 "wrid=0x%llx, status=0x%x\n", 1426 wc.wr_id, wc.status); 1427 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id & 1428 (MLX4_NUM_TUNNEL_BUFS - 1)].ah); 1429 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1430 = NULL; 1431 spin_lock(&tun_qp->tx_lock); 1432 tun_qp->tx_ix_tail++; 1433 spin_unlock(&tun_qp->tx_lock); 1434 1435 break; 1436 default: 1437 break; 1438 } 1439 } else { 1440 pr_debug("mlx4_ib: completion error in tunnel: %d." 1441 " status = %d, wrid = 0x%llx\n", 1442 ctx->slave, wc.status, wc.wr_id); 1443 if (!MLX4_TUN_IS_RECV(wc.wr_id)) { 1444 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id & 1445 (MLX4_NUM_TUNNEL_BUFS - 1)].ah); 1446 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1447 = NULL; 1448 spin_lock(&tun_qp->tx_lock); 1449 tun_qp->tx_ix_tail++; 1450 spin_unlock(&tun_qp->tx_lock); 1451 } 1452 } 1453 } 1454 } 1455 1456 static void pv_qp_event_handler(struct ib_event *event, void *qp_context) 1457 { 1458 struct mlx4_ib_demux_pv_ctx *sqp = qp_context; 1459 1460 /* It's worse than that! He's dead, Jim! */ 1461 pr_err("Fatal error (%d) on a MAD QP on port %d\n", 1462 event->event, sqp->port); 1463 } 1464 1465 static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx, 1466 enum ib_qp_type qp_type, int create_tun) 1467 { 1468 int i, ret; 1469 struct mlx4_ib_demux_pv_qp *tun_qp; 1470 struct mlx4_ib_qp_tunnel_init_attr qp_init_attr; 1471 struct ib_qp_attr attr; 1472 int qp_attr_mask_INIT; 1473 1474 if (qp_type > IB_QPT_GSI) 1475 return -EINVAL; 1476 1477 tun_qp = &ctx->qp[qp_type]; 1478 1479 memset(&qp_init_attr, 0, sizeof qp_init_attr); 1480 qp_init_attr.init_attr.send_cq = ctx->cq; 1481 qp_init_attr.init_attr.recv_cq = ctx->cq; 1482 qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; 1483 qp_init_attr.init_attr.cap.max_send_wr = MLX4_NUM_TUNNEL_BUFS; 1484 qp_init_attr.init_attr.cap.max_recv_wr = MLX4_NUM_TUNNEL_BUFS; 1485 qp_init_attr.init_attr.cap.max_send_sge = 1; 1486 qp_init_attr.init_attr.cap.max_recv_sge = 1; 1487 if (create_tun) { 1488 qp_init_attr.init_attr.qp_type = IB_QPT_UD; 1489 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_TUNNEL_QP; 1490 qp_init_attr.port = ctx->port; 1491 qp_init_attr.slave = ctx->slave; 1492 qp_init_attr.proxy_qp_type = qp_type; 1493 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | 1494 IB_QP_QKEY | IB_QP_PORT; 1495 } else { 1496 qp_init_attr.init_attr.qp_type = qp_type; 1497 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_SQP; 1498 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY; 1499 } 1500 qp_init_attr.init_attr.port_num = ctx->port; 1501 qp_init_attr.init_attr.qp_context = ctx; 1502 qp_init_attr.init_attr.event_handler = pv_qp_event_handler; 1503 tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr); 1504 if (IS_ERR(tun_qp->qp)) { 1505 ret = PTR_ERR(tun_qp->qp); 1506 tun_qp->qp = NULL; 1507 pr_err("Couldn't create %s QP (%d)\n", 1508 create_tun ? "tunnel" : "special", ret); 1509 return ret; 1510 } 1511 1512 memset(&attr, 0, sizeof attr); 1513 attr.qp_state = IB_QPS_INIT; 1514 ret = 0; 1515 if (create_tun) 1516 ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave, 1517 ctx->port, IB_DEFAULT_PKEY_FULL, 1518 &attr.pkey_index); 1519 if (ret || !create_tun) 1520 attr.pkey_index = 1521 to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0]; 1522 attr.qkey = IB_QP1_QKEY; 1523 attr.port_num = ctx->port; 1524 ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT); 1525 if (ret) { 1526 pr_err("Couldn't change %s qp state to INIT (%d)\n", 1527 create_tun ? "tunnel" : "special", ret); 1528 goto err_qp; 1529 } 1530 attr.qp_state = IB_QPS_RTR; 1531 ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE); 1532 if (ret) { 1533 pr_err("Couldn't change %s qp state to RTR (%d)\n", 1534 create_tun ? "tunnel" : "special", ret); 1535 goto err_qp; 1536 } 1537 attr.qp_state = IB_QPS_RTS; 1538 attr.sq_psn = 0; 1539 ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN); 1540 if (ret) { 1541 pr_err("Couldn't change %s qp state to RTS (%d)\n", 1542 create_tun ? "tunnel" : "special", ret); 1543 goto err_qp; 1544 } 1545 1546 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) { 1547 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i); 1548 if (ret) { 1549 pr_err(" mlx4_ib_post_pv_buf error" 1550 " (err = %d, i = %d)\n", ret, i); 1551 goto err_qp; 1552 } 1553 } 1554 return 0; 1555 1556 err_qp: 1557 ib_destroy_qp(tun_qp->qp); 1558 tun_qp->qp = NULL; 1559 return ret; 1560 } 1561 1562 /* 1563 * IB MAD completion callback for real SQPs 1564 */ 1565 static void mlx4_ib_sqp_comp_worker(struct work_struct *work) 1566 { 1567 struct mlx4_ib_demux_pv_ctx *ctx; 1568 struct mlx4_ib_demux_pv_qp *sqp; 1569 struct ib_wc wc; 1570 struct ib_grh *grh; 1571 struct ib_mad *mad; 1572 1573 ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work); 1574 ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); 1575 1576 while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) { 1577 sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)]; 1578 if (wc.status == IB_WC_SUCCESS) { 1579 switch (wc.opcode) { 1580 case IB_WC_SEND: 1581 ib_destroy_ah(sqp->tx_ring[wc.wr_id & 1582 (MLX4_NUM_TUNNEL_BUFS - 1)].ah); 1583 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1584 = NULL; 1585 spin_lock(&sqp->tx_lock); 1586 sqp->tx_ix_tail++; 1587 spin_unlock(&sqp->tx_lock); 1588 break; 1589 case IB_WC_RECV: 1590 mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *) 1591 (sqp->ring[wc.wr_id & 1592 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->payload); 1593 grh = &(((struct mlx4_mad_rcv_buf *) 1594 (sqp->ring[wc.wr_id & 1595 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->grh); 1596 mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad); 1597 if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id & 1598 (MLX4_NUM_TUNNEL_BUFS - 1))) 1599 pr_err("Failed reposting SQP " 1600 "buf:%lld\n", wc.wr_id); 1601 break; 1602 default: 1603 BUG_ON(1); 1604 break; 1605 } 1606 } else { 1607 pr_debug("mlx4_ib: completion error in tunnel: %d." 1608 " status = %d, wrid = 0x%llx\n", 1609 ctx->slave, wc.status, wc.wr_id); 1610 if (!MLX4_TUN_IS_RECV(wc.wr_id)) { 1611 ib_destroy_ah(sqp->tx_ring[wc.wr_id & 1612 (MLX4_NUM_TUNNEL_BUFS - 1)].ah); 1613 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah 1614 = NULL; 1615 spin_lock(&sqp->tx_lock); 1616 sqp->tx_ix_tail++; 1617 spin_unlock(&sqp->tx_lock); 1618 } 1619 } 1620 } 1621 } 1622 1623 static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port, 1624 struct mlx4_ib_demux_pv_ctx **ret_ctx) 1625 { 1626 struct mlx4_ib_demux_pv_ctx *ctx; 1627 1628 *ret_ctx = NULL; 1629 ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL); 1630 if (!ctx) { 1631 pr_err("failed allocating pv resource context " 1632 "for port %d, slave %d\n", port, slave); 1633 return -ENOMEM; 1634 } 1635 1636 ctx->ib_dev = &dev->ib_dev; 1637 ctx->port = port; 1638 ctx->slave = slave; 1639 *ret_ctx = ctx; 1640 return 0; 1641 } 1642 1643 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port) 1644 { 1645 if (dev->sriov.demux[port - 1].tun[slave]) { 1646 kfree(dev->sriov.demux[port - 1].tun[slave]); 1647 dev->sriov.demux[port - 1].tun[slave] = NULL; 1648 } 1649 } 1650 1651 static int create_pv_resources(struct ib_device *ibdev, int slave, int port, 1652 int create_tun, struct mlx4_ib_demux_pv_ctx *ctx) 1653 { 1654 int ret, cq_size; 1655 1656 if (ctx->state != DEMUX_PV_STATE_DOWN) 1657 return -EEXIST; 1658 1659 ctx->state = DEMUX_PV_STATE_STARTING; 1660 /* have QP0 only on port owner, and only if link layer is IB */ 1661 if (ctx->slave == mlx4_master_func_num(to_mdev(ctx->ib_dev)->dev) && 1662 rdma_port_get_link_layer(ibdev, ctx->port) == IB_LINK_LAYER_INFINIBAND) 1663 ctx->has_smi = 1; 1664 1665 if (ctx->has_smi) { 1666 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun); 1667 if (ret) { 1668 pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret); 1669 goto err_out; 1670 } 1671 } 1672 1673 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun); 1674 if (ret) { 1675 pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret); 1676 goto err_out_qp0; 1677 } 1678 1679 cq_size = 2 * MLX4_NUM_TUNNEL_BUFS; 1680 if (ctx->has_smi) 1681 cq_size *= 2; 1682 1683 ctx->cq = ib_create_cq(ctx->ib_dev, mlx4_ib_tunnel_comp_handler, 1684 NULL, ctx, cq_size, 0); 1685 if (IS_ERR(ctx->cq)) { 1686 ret = PTR_ERR(ctx->cq); 1687 pr_err("Couldn't create tunnel CQ (%d)\n", ret); 1688 goto err_buf; 1689 } 1690 1691 ctx->pd = ib_alloc_pd(ctx->ib_dev); 1692 if (IS_ERR(ctx->pd)) { 1693 ret = PTR_ERR(ctx->pd); 1694 pr_err("Couldn't create tunnel PD (%d)\n", ret); 1695 goto err_cq; 1696 } 1697 1698 ctx->mr = ib_get_dma_mr(ctx->pd, IB_ACCESS_LOCAL_WRITE); 1699 if (IS_ERR(ctx->mr)) { 1700 ret = PTR_ERR(ctx->mr); 1701 pr_err("Couldn't get tunnel DMA MR (%d)\n", ret); 1702 goto err_pd; 1703 } 1704 1705 if (ctx->has_smi) { 1706 ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun); 1707 if (ret) { 1708 pr_err("Couldn't create %s QP0 (%d)\n", 1709 create_tun ? "tunnel for" : "", ret); 1710 goto err_mr; 1711 } 1712 } 1713 1714 ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun); 1715 if (ret) { 1716 pr_err("Couldn't create %s QP1 (%d)\n", 1717 create_tun ? "tunnel for" : "", ret); 1718 goto err_qp0; 1719 } 1720 1721 if (create_tun) 1722 INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker); 1723 else 1724 INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker); 1725 1726 ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq; 1727 1728 ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP); 1729 if (ret) { 1730 pr_err("Couldn't arm tunnel cq (%d)\n", ret); 1731 goto err_wq; 1732 } 1733 ctx->state = DEMUX_PV_STATE_ACTIVE; 1734 return 0; 1735 1736 err_wq: 1737 ctx->wq = NULL; 1738 ib_destroy_qp(ctx->qp[1].qp); 1739 ctx->qp[1].qp = NULL; 1740 1741 1742 err_qp0: 1743 if (ctx->has_smi) 1744 ib_destroy_qp(ctx->qp[0].qp); 1745 ctx->qp[0].qp = NULL; 1746 1747 err_mr: 1748 ib_dereg_mr(ctx->mr); 1749 ctx->mr = NULL; 1750 1751 err_pd: 1752 ib_dealloc_pd(ctx->pd); 1753 ctx->pd = NULL; 1754 1755 err_cq: 1756 ib_destroy_cq(ctx->cq); 1757 ctx->cq = NULL; 1758 1759 err_buf: 1760 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun); 1761 1762 err_out_qp0: 1763 if (ctx->has_smi) 1764 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun); 1765 err_out: 1766 ctx->state = DEMUX_PV_STATE_DOWN; 1767 return ret; 1768 } 1769 1770 static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port, 1771 struct mlx4_ib_demux_pv_ctx *ctx, int flush) 1772 { 1773 if (!ctx) 1774 return; 1775 if (ctx->state > DEMUX_PV_STATE_DOWN) { 1776 ctx->state = DEMUX_PV_STATE_DOWNING; 1777 if (flush) 1778 flush_workqueue(ctx->wq); 1779 if (ctx->has_smi) { 1780 ib_destroy_qp(ctx->qp[0].qp); 1781 ctx->qp[0].qp = NULL; 1782 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1); 1783 } 1784 ib_destroy_qp(ctx->qp[1].qp); 1785 ctx->qp[1].qp = NULL; 1786 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1); 1787 ib_dereg_mr(ctx->mr); 1788 ctx->mr = NULL; 1789 ib_dealloc_pd(ctx->pd); 1790 ctx->pd = NULL; 1791 ib_destroy_cq(ctx->cq); 1792 ctx->cq = NULL; 1793 ctx->state = DEMUX_PV_STATE_DOWN; 1794 } 1795 } 1796 1797 static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave, 1798 int port, int do_init) 1799 { 1800 int ret = 0; 1801 1802 if (!do_init) { 1803 clean_vf_mcast(&dev->sriov.demux[port - 1], slave); 1804 /* for master, destroy real sqp resources */ 1805 if (slave == mlx4_master_func_num(dev->dev)) 1806 destroy_pv_resources(dev, slave, port, 1807 dev->sriov.sqps[port - 1], 1); 1808 /* destroy the tunnel qp resources */ 1809 destroy_pv_resources(dev, slave, port, 1810 dev->sriov.demux[port - 1].tun[slave], 1); 1811 return 0; 1812 } 1813 1814 /* create the tunnel qp resources */ 1815 ret = create_pv_resources(&dev->ib_dev, slave, port, 1, 1816 dev->sriov.demux[port - 1].tun[slave]); 1817 1818 /* for master, create the real sqp resources */ 1819 if (!ret && slave == mlx4_master_func_num(dev->dev)) 1820 ret = create_pv_resources(&dev->ib_dev, slave, port, 0, 1821 dev->sriov.sqps[port - 1]); 1822 return ret; 1823 } 1824 1825 void mlx4_ib_tunnels_update_work(struct work_struct *work) 1826 { 1827 struct mlx4_ib_demux_work *dmxw; 1828 1829 dmxw = container_of(work, struct mlx4_ib_demux_work, work); 1830 mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port, 1831 dmxw->do_init); 1832 kfree(dmxw); 1833 return; 1834 } 1835 1836 static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev, 1837 struct mlx4_ib_demux_ctx *ctx, 1838 int port) 1839 { 1840 char name[12]; 1841 int ret = 0; 1842 int i; 1843 1844 ctx->tun = kcalloc(dev->dev->caps.sqp_demux, 1845 sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL); 1846 if (!ctx->tun) 1847 return -ENOMEM; 1848 1849 ctx->dev = dev; 1850 ctx->port = port; 1851 ctx->ib_dev = &dev->ib_dev; 1852 1853 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 1854 ret = alloc_pv_object(dev, i, port, &ctx->tun[i]); 1855 if (ret) { 1856 ret = -ENOMEM; 1857 goto err_mcg; 1858 } 1859 } 1860 1861 ret = mlx4_ib_mcg_port_init(ctx); 1862 if (ret) { 1863 pr_err("Failed initializing mcg para-virt (%d)\n", ret); 1864 goto err_mcg; 1865 } 1866 1867 snprintf(name, sizeof name, "mlx4_ibt%d", port); 1868 ctx->wq = create_singlethread_workqueue(name); 1869 if (!ctx->wq) { 1870 pr_err("Failed to create tunnelling WQ for port %d\n", port); 1871 ret = -ENOMEM; 1872 goto err_wq; 1873 } 1874 1875 snprintf(name, sizeof name, "mlx4_ibud%d", port); 1876 ctx->ud_wq = create_singlethread_workqueue(name); 1877 if (!ctx->ud_wq) { 1878 pr_err("Failed to create up/down WQ for port %d\n", port); 1879 ret = -ENOMEM; 1880 goto err_udwq; 1881 } 1882 1883 return 0; 1884 1885 err_udwq: 1886 destroy_workqueue(ctx->wq); 1887 ctx->wq = NULL; 1888 1889 err_wq: 1890 mlx4_ib_mcg_port_cleanup(ctx, 1); 1891 err_mcg: 1892 for (i = 0; i < dev->dev->caps.sqp_demux; i++) 1893 free_pv_object(dev, i, port); 1894 kfree(ctx->tun); 1895 ctx->tun = NULL; 1896 return ret; 1897 } 1898 1899 static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx) 1900 { 1901 if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) { 1902 sqp_ctx->state = DEMUX_PV_STATE_DOWNING; 1903 flush_workqueue(sqp_ctx->wq); 1904 if (sqp_ctx->has_smi) { 1905 ib_destroy_qp(sqp_ctx->qp[0].qp); 1906 sqp_ctx->qp[0].qp = NULL; 1907 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0); 1908 } 1909 ib_destroy_qp(sqp_ctx->qp[1].qp); 1910 sqp_ctx->qp[1].qp = NULL; 1911 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0); 1912 ib_dereg_mr(sqp_ctx->mr); 1913 sqp_ctx->mr = NULL; 1914 ib_dealloc_pd(sqp_ctx->pd); 1915 sqp_ctx->pd = NULL; 1916 ib_destroy_cq(sqp_ctx->cq); 1917 sqp_ctx->cq = NULL; 1918 sqp_ctx->state = DEMUX_PV_STATE_DOWN; 1919 } 1920 } 1921 1922 static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx) 1923 { 1924 int i; 1925 if (ctx) { 1926 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev); 1927 mlx4_ib_mcg_port_cleanup(ctx, 1); 1928 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 1929 if (!ctx->tun[i]) 1930 continue; 1931 if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN) 1932 ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING; 1933 } 1934 flush_workqueue(ctx->wq); 1935 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 1936 destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0); 1937 free_pv_object(dev, i, ctx->port); 1938 } 1939 kfree(ctx->tun); 1940 destroy_workqueue(ctx->ud_wq); 1941 destroy_workqueue(ctx->wq); 1942 } 1943 } 1944 1945 static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init) 1946 { 1947 int i; 1948 1949 if (!mlx4_is_master(dev->dev)) 1950 return; 1951 /* initialize or tear down tunnel QPs for the master */ 1952 for (i = 0; i < dev->dev->caps.num_ports; i++) 1953 mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init); 1954 return; 1955 } 1956 1957 int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev) 1958 { 1959 int i = 0; 1960 int err; 1961 1962 if (!mlx4_is_mfunc(dev->dev)) 1963 return 0; 1964 1965 dev->sriov.is_going_down = 0; 1966 spin_lock_init(&dev->sriov.going_down_lock); 1967 mlx4_ib_cm_paravirt_init(dev); 1968 1969 mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n"); 1970 1971 if (mlx4_is_slave(dev->dev)) { 1972 mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n"); 1973 return 0; 1974 } 1975 1976 for (i = 0; i < dev->dev->caps.sqp_demux; i++) { 1977 if (i == mlx4_master_func_num(dev->dev)) 1978 mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid); 1979 else 1980 mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid()); 1981 } 1982 1983 err = mlx4_ib_init_alias_guid_service(dev); 1984 if (err) { 1985 mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n"); 1986 goto paravirt_err; 1987 } 1988 err = mlx4_ib_device_register_sysfs(dev); 1989 if (err) { 1990 mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n"); 1991 goto sysfs_err; 1992 } 1993 1994 mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n", 1995 dev->dev->caps.sqp_demux); 1996 for (i = 0; i < dev->num_ports; i++) { 1997 union ib_gid gid; 1998 err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1); 1999 if (err) 2000 goto demux_err; 2001 dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id; 2002 err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1, 2003 &dev->sriov.sqps[i]); 2004 if (err) 2005 goto demux_err; 2006 err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1); 2007 if (err) 2008 goto free_pv; 2009 } 2010 mlx4_ib_master_tunnels(dev, 1); 2011 return 0; 2012 2013 free_pv: 2014 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1); 2015 demux_err: 2016 while (--i >= 0) { 2017 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1); 2018 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]); 2019 } 2020 mlx4_ib_device_unregister_sysfs(dev); 2021 2022 sysfs_err: 2023 mlx4_ib_destroy_alias_guid_service(dev); 2024 2025 paravirt_err: 2026 mlx4_ib_cm_paravirt_clean(dev, -1); 2027 2028 return err; 2029 } 2030 2031 void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev) 2032 { 2033 int i; 2034 unsigned long flags; 2035 2036 if (!mlx4_is_mfunc(dev->dev)) 2037 return; 2038 2039 spin_lock_irqsave(&dev->sriov.going_down_lock, flags); 2040 dev->sriov.is_going_down = 1; 2041 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags); 2042 if (mlx4_is_master(dev->dev)) { 2043 for (i = 0; i < dev->num_ports; i++) { 2044 flush_workqueue(dev->sriov.demux[i].ud_wq); 2045 mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]); 2046 kfree(dev->sriov.sqps[i]); 2047 dev->sriov.sqps[i] = NULL; 2048 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]); 2049 } 2050 2051 mlx4_ib_cm_paravirt_clean(dev, -1); 2052 mlx4_ib_destroy_alias_guid_service(dev); 2053 mlx4_ib_device_unregister_sysfs(dev); 2054 } 2055 } 2056