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
mlx4_ib_gen_node_guid(void)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
mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx * ctx)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
mlx4_MAD_IFC(struct mlx4_ib_dev * dev,int mad_ifc_flags,int port,const struct ib_wc * in_wc,const struct ib_grh * in_grh,const void * in_mad,void * response_mad)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
update_sm_ah(struct mlx4_ib_dev * dev,u8 port_num,u16 lid,u8 sl)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 */
smp_snoop(struct ib_device * ibdev,u8 port_num,const struct ib_mad * mad,u16 prev_lid)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
__propagate_pkey_ev(struct mlx4_ib_dev * dev,int port_num,int block,u32 change_bitmap)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
node_desc_override(struct ib_device * dev,struct ib_mad * mad)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
forward_trap(struct mlx4_ib_dev * dev,u8 port_num,const struct ib_mad * mad)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
mlx4_ib_demux_sa_handler(struct ib_device * ibdev,int port,int slave,struct ib_sa_mad * sa_mad)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
mlx4_ib_find_real_gid(struct ib_device * ibdev,u8 port,__be64 guid)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
find_slave_port_pkey_ix(struct mlx4_ib_dev * dev,int slave,u8 port,u16 pkey,u16 * ix)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
mlx4_ib_send_to_slave(struct mlx4_ib_dev * dev,int slave,u8 port,enum ib_qp_type dest_qpt,struct ib_wc * wc,struct ib_grh * grh,struct ib_mad * mad)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 const 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
mlx4_ib_demux_mad(struct ib_device * ibdev,u8 port,struct ib_wc * wc,struct ib_grh * grh,struct ib_mad * mad)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
ib_process_mad(struct ib_device * ibdev,int mad_flags,u8 port_num,const struct ib_wc * in_wc,const struct ib_grh * in_grh,const struct ib_mad * in_mad,struct ib_mad * out_mad)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
edit_counter(struct mlx4_counter * cnt,void * counters,__be16 attr_id)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
iboe_process_mad_port_info(void * out_mad)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
iboe_process_mad(struct ib_device * ibdev,int mad_flags,u8 port_num,const struct ib_wc * in_wc,const struct ib_grh * in_grh,const struct ib_mad * in_mad,struct ib_mad * out_mad)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
mlx4_ib_process_mad(struct ib_device * ibdev,int mad_flags,u8 port_num,const struct ib_wc * in_wc,const struct ib_grh * in_grh,const struct ib_mad_hdr * in,size_t in_mad_size,struct ib_mad_hdr * out,size_t * out_mad_size,u16 * out_mad_pkey_index)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
send_handler(struct ib_mad_agent * agent,struct ib_mad_send_wc * mad_send_wc)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
mlx4_ib_mad_init(struct mlx4_ib_dev * dev)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
mlx4_ib_mad_cleanup(struct mlx4_ib_dev * dev)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
handle_lid_change_event(struct mlx4_ib_dev * dev,u8 port_num)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
handle_client_rereg_event(struct mlx4_ib_dev * dev,u8 port_num)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
propagate_pkey_ev(struct mlx4_ib_dev * dev,int port_num,struct mlx4_eqe * eqe)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
handle_slaves_guid_change(struct mlx4_ib_dev * dev,u8 port_num,u32 guid_tbl_blk_num,u32 change_bitmap)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
handle_port_mgmt_change_event(struct work_struct * work)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
mlx4_ib_dispatch_event(struct mlx4_ib_dev * dev,u8 port_num,enum ib_event_type type)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
mlx4_ib_tunnel_comp_handler(struct ib_cq * cq,void * arg)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
mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx * ctx,struct mlx4_ib_demux_pv_qp * tun_qp,int index)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;
1279 const struct ib_recv_wr *bad_recv_wr;
1280 int size;
1281
1282 size = (tun_qp->qp->qp_type == IB_QPT_UD) ?
1283 sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf);
1284
1285 sg_list.addr = tun_qp->ring[index].map;
1286 sg_list.length = size;
1287 sg_list.lkey = ctx->pd->local_dma_lkey;
1288
1289 recv_wr.next = NULL;
1290 recv_wr.sg_list = &sg_list;
1291 recv_wr.num_sge = 1;
1292 recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV |
1293 MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt);
1294 ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map,
1295 size, DMA_FROM_DEVICE);
1296 return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr);
1297 }
1298
mlx4_ib_multiplex_sa_handler(struct ib_device * ibdev,int port,int slave,struct ib_sa_mad * sa_mad)1299 static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port,
1300 int slave, struct ib_sa_mad *sa_mad)
1301 {
1302 int ret = 0;
1303
1304 /* dispatch to different sa handlers */
1305 switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
1306 case IB_SA_ATTR_MC_MEMBER_REC:
1307 ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad);
1308 break;
1309 default:
1310 break;
1311 }
1312 return ret;
1313 }
1314
is_proxy_qp0(struct mlx4_ib_dev * dev,int qpn,int slave)1315 static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave)
1316 {
1317 int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave;
1318
1319 return (qpn >= proxy_start && qpn <= proxy_start + 1);
1320 }
1321
1322
mlx4_ib_send_to_wire(struct mlx4_ib_dev * dev,int slave,u8 port,enum ib_qp_type dest_qpt,u16 pkey_index,u32 remote_qpn,u32 qkey,struct ib_ah_attr * attr,u8 * s_mac,u16 vlan_id,struct ib_mad * mad)1323 int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u8 port,
1324 enum ib_qp_type dest_qpt, u16 pkey_index,
1325 u32 remote_qpn, u32 qkey, struct ib_ah_attr *attr,
1326 u8 *s_mac, u16 vlan_id, struct ib_mad *mad)
1327 {
1328 struct ib_sge list;
1329 struct ib_ud_wr wr;
1330 const struct ib_send_wr *bad_wr;
1331 struct mlx4_ib_demux_pv_ctx *sqp_ctx;
1332 struct mlx4_ib_demux_pv_qp *sqp;
1333 struct mlx4_mad_snd_buf *sqp_mad;
1334 struct ib_ah *ah;
1335 struct ib_qp *send_qp = NULL;
1336 unsigned wire_tx_ix = 0;
1337 int ret = 0;
1338 u16 wire_pkey_ix;
1339 int src_qpnum;
1340 u8 sgid_index;
1341
1342
1343 sqp_ctx = dev->sriov.sqps[port-1];
1344
1345 /* check if proxy qp created */
1346 if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE)
1347 return -EAGAIN;
1348
1349 if (dest_qpt == IB_QPT_SMI) {
1350 src_qpnum = 0;
1351 sqp = &sqp_ctx->qp[0];
1352 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
1353 } else {
1354 src_qpnum = 1;
1355 sqp = &sqp_ctx->qp[1];
1356 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index];
1357 }
1358
1359 send_qp = sqp->qp;
1360
1361 /* create ah */
1362 sgid_index = attr->grh.sgid_index;
1363 attr->grh.sgid_index = 0;
1364 ah = ib_create_ah(sqp_ctx->pd, attr);
1365 if (IS_ERR(ah))
1366 return -ENOMEM;
1367 attr->grh.sgid_index = sgid_index;
1368 to_mah(ah)->av.ib.gid_index = sgid_index;
1369 /* get rid of force-loopback bit */
1370 to_mah(ah)->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF);
1371 spin_lock(&sqp->tx_lock);
1372 if (sqp->tx_ix_head - sqp->tx_ix_tail >=
1373 (MLX4_NUM_TUNNEL_BUFS - 1))
1374 ret = -EAGAIN;
1375 else
1376 wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
1377 spin_unlock(&sqp->tx_lock);
1378 if (ret)
1379 goto out;
1380
1381 sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr);
1382 if (sqp->tx_ring[wire_tx_ix].ah)
1383 ib_destroy_ah(sqp->tx_ring[wire_tx_ix].ah);
1384 sqp->tx_ring[wire_tx_ix].ah = ah;
1385 ib_dma_sync_single_for_cpu(&dev->ib_dev,
1386 sqp->tx_ring[wire_tx_ix].buf.map,
1387 sizeof (struct mlx4_mad_snd_buf),
1388 DMA_TO_DEVICE);
1389
1390 memcpy(&sqp_mad->payload, mad, sizeof *mad);
1391
1392 ib_dma_sync_single_for_device(&dev->ib_dev,
1393 sqp->tx_ring[wire_tx_ix].buf.map,
1394 sizeof (struct mlx4_mad_snd_buf),
1395 DMA_TO_DEVICE);
1396
1397 list.addr = sqp->tx_ring[wire_tx_ix].buf.map;
1398 list.length = sizeof (struct mlx4_mad_snd_buf);
1399 list.lkey = sqp_ctx->pd->local_dma_lkey;
1400
1401 wr.ah = ah;
1402 wr.port_num = port;
1403 wr.pkey_index = wire_pkey_ix;
1404 wr.remote_qkey = qkey;
1405 wr.remote_qpn = remote_qpn;
1406 wr.wr.next = NULL;
1407 wr.wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum);
1408 wr.wr.sg_list = &list;
1409 wr.wr.num_sge = 1;
1410 wr.wr.opcode = IB_WR_SEND;
1411 wr.wr.send_flags = IB_SEND_SIGNALED;
1412 if (s_mac)
1413 memcpy(to_mah(ah)->av.eth.s_mac, s_mac, 6);
1414 if (vlan_id < 0x1000)
1415 vlan_id |= (attr->sl & 7) << 13;
1416 to_mah(ah)->av.eth.vlan = cpu_to_be16(vlan_id);
1417
1418
1419 ret = ib_post_send(send_qp, &wr.wr, &bad_wr);
1420 if (!ret)
1421 return 0;
1422
1423 spin_lock(&sqp->tx_lock);
1424 sqp->tx_ix_tail++;
1425 spin_unlock(&sqp->tx_lock);
1426 sqp->tx_ring[wire_tx_ix].ah = NULL;
1427 out:
1428 ib_destroy_ah(ah);
1429 return ret;
1430 }
1431
get_slave_base_gid_ix(struct mlx4_ib_dev * dev,int slave,int port)1432 static int get_slave_base_gid_ix(struct mlx4_ib_dev *dev, int slave, int port)
1433 {
1434 if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1435 return slave;
1436 return mlx4_get_base_gid_ix(dev->dev, slave, port);
1437 }
1438
fill_in_real_sgid_index(struct mlx4_ib_dev * dev,int slave,int port,struct ib_ah_attr * ah_attr)1439 static void fill_in_real_sgid_index(struct mlx4_ib_dev *dev, int slave, int port,
1440 struct ib_ah_attr *ah_attr)
1441 {
1442 if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1443 ah_attr->grh.sgid_index = slave;
1444 else
1445 ah_attr->grh.sgid_index += get_slave_base_gid_ix(dev, slave, port);
1446 }
1447
mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx * ctx,struct ib_wc * wc)1448 static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc)
1449 {
1450 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1451 struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)];
1452 int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1);
1453 struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr;
1454 struct mlx4_ib_ah ah;
1455 struct ib_ah_attr ah_attr;
1456 u8 *slave_id;
1457 int slave;
1458 int port;
1459 u16 vlan_id;
1460
1461 /* Get slave that sent this packet */
1462 if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn ||
1463 wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX ||
1464 (wc->src_qp & 0x1) != ctx->port - 1 ||
1465 wc->src_qp & 0x4) {
1466 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp);
1467 return;
1468 }
1469 slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8;
1470 if (slave != ctx->slave) {
1471 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: "
1472 "belongs to another slave\n", wc->src_qp);
1473 return;
1474 }
1475
1476 /* Map transaction ID */
1477 ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map,
1478 sizeof (struct mlx4_tunnel_mad),
1479 DMA_FROM_DEVICE);
1480 switch (tunnel->mad.mad_hdr.method) {
1481 case IB_MGMT_METHOD_SET:
1482 case IB_MGMT_METHOD_GET:
1483 case IB_MGMT_METHOD_REPORT:
1484 case IB_SA_METHOD_GET_TABLE:
1485 case IB_SA_METHOD_DELETE:
1486 case IB_SA_METHOD_GET_MULTI:
1487 case IB_SA_METHOD_GET_TRACE_TBL:
1488 slave_id = (u8 *) &tunnel->mad.mad_hdr.tid;
1489 if (*slave_id) {
1490 mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d "
1491 "class:%d slave:%d\n", *slave_id,
1492 tunnel->mad.mad_hdr.mgmt_class, slave);
1493 return;
1494 } else
1495 *slave_id = slave;
1496 default:
1497 /* nothing */;
1498 }
1499
1500 /* Class-specific handling */
1501 switch (tunnel->mad.mad_hdr.mgmt_class) {
1502 case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1503 case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1504 if (slave != mlx4_master_func_num(dev->dev) &&
1505 !mlx4_vf_smi_enabled(dev->dev, slave, ctx->port))
1506 return;
1507 break;
1508 case IB_MGMT_CLASS_SUBN_ADM:
1509 if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave,
1510 (struct ib_sa_mad *) &tunnel->mad))
1511 return;
1512 break;
1513 case IB_MGMT_CLASS_CM:
1514 if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave,
1515 (struct ib_mad *) &tunnel->mad))
1516 return;
1517 break;
1518 case IB_MGMT_CLASS_DEVICE_MGMT:
1519 if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET &&
1520 tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET)
1521 return;
1522 break;
1523 default:
1524 /* Drop unsupported classes for slaves in tunnel mode */
1525 if (slave != mlx4_master_func_num(dev->dev)) {
1526 mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d "
1527 "for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave);
1528 return;
1529 }
1530 }
1531
1532 /* We are using standard ib_core services to send the mad, so generate a
1533 * stadard address handle by decoding the tunnelled mlx4_ah fields */
1534 memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av));
1535 ah.ibah.device = ctx->ib_dev;
1536
1537 port = be32_to_cpu(ah.av.ib.port_pd) >> 24;
1538 port = mlx4_slave_convert_port(dev->dev, slave, port);
1539 if (port < 0)
1540 return;
1541 ah.av.ib.port_pd = cpu_to_be32(port << 24 | (be32_to_cpu(ah.av.ib.port_pd) & 0xffffff));
1542
1543 mlx4_ib_query_ah(&ah.ibah, &ah_attr);
1544 if (ah_attr.ah_flags & IB_AH_GRH)
1545 fill_in_real_sgid_index(dev, slave, ctx->port, &ah_attr);
1546
1547 memcpy(ah_attr.dmac, tunnel->hdr.mac, 6);
1548 vlan_id = be16_to_cpu(tunnel->hdr.vlan);
1549 /* if slave have default vlan use it */
1550 mlx4_get_slave_default_vlan(dev->dev, ctx->port, slave,
1551 &vlan_id, &ah_attr.sl);
1552
1553 mlx4_ib_send_to_wire(dev, slave, ctx->port,
1554 is_proxy_qp0(dev, wc->src_qp, slave) ?
1555 IB_QPT_SMI : IB_QPT_GSI,
1556 be16_to_cpu(tunnel->hdr.pkey_index),
1557 be32_to_cpu(tunnel->hdr.remote_qpn),
1558 be32_to_cpu(tunnel->hdr.qkey),
1559 &ah_attr, wc->smac, vlan_id, &tunnel->mad);
1560 }
1561
mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx * ctx,enum ib_qp_type qp_type,int is_tun)1562 static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1563 enum ib_qp_type qp_type, int is_tun)
1564 {
1565 int i;
1566 struct mlx4_ib_demux_pv_qp *tun_qp;
1567 int rx_buf_size, tx_buf_size;
1568
1569 if (qp_type > IB_QPT_GSI)
1570 return -EINVAL;
1571
1572 tun_qp = &ctx->qp[qp_type];
1573
1574 tun_qp->ring = kzalloc(sizeof (struct mlx4_ib_buf) * MLX4_NUM_TUNNEL_BUFS,
1575 GFP_KERNEL);
1576 if (!tun_qp->ring)
1577 return -ENOMEM;
1578
1579 tun_qp->tx_ring = kcalloc(MLX4_NUM_TUNNEL_BUFS,
1580 sizeof (struct mlx4_ib_tun_tx_buf),
1581 GFP_KERNEL);
1582 if (!tun_qp->tx_ring) {
1583 kfree(tun_qp->ring);
1584 tun_qp->ring = NULL;
1585 return -ENOMEM;
1586 }
1587
1588 if (is_tun) {
1589 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1590 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1591 } else {
1592 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1593 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1594 }
1595
1596 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1597 tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL);
1598 if (!tun_qp->ring[i].addr)
1599 goto err;
1600 tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev,
1601 tun_qp->ring[i].addr,
1602 rx_buf_size,
1603 DMA_FROM_DEVICE);
1604 if (ib_dma_mapping_error(ctx->ib_dev, tun_qp->ring[i].map)) {
1605 kfree(tun_qp->ring[i].addr);
1606 goto err;
1607 }
1608 }
1609
1610 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1611 tun_qp->tx_ring[i].buf.addr =
1612 kmalloc(tx_buf_size, GFP_KERNEL);
1613 if (!tun_qp->tx_ring[i].buf.addr)
1614 goto tx_err;
1615 tun_qp->tx_ring[i].buf.map =
1616 ib_dma_map_single(ctx->ib_dev,
1617 tun_qp->tx_ring[i].buf.addr,
1618 tx_buf_size,
1619 DMA_TO_DEVICE);
1620 if (ib_dma_mapping_error(ctx->ib_dev,
1621 tun_qp->tx_ring[i].buf.map)) {
1622 kfree(tun_qp->tx_ring[i].buf.addr);
1623 goto tx_err;
1624 }
1625 tun_qp->tx_ring[i].ah = NULL;
1626 }
1627 spin_lock_init(&tun_qp->tx_lock);
1628 tun_qp->tx_ix_head = 0;
1629 tun_qp->tx_ix_tail = 0;
1630 tun_qp->proxy_qpt = qp_type;
1631
1632 return 0;
1633
1634 tx_err:
1635 while (i > 0) {
1636 --i;
1637 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1638 tx_buf_size, DMA_TO_DEVICE);
1639 kfree(tun_qp->tx_ring[i].buf.addr);
1640 }
1641 kfree(tun_qp->tx_ring);
1642 tun_qp->tx_ring = NULL;
1643 i = MLX4_NUM_TUNNEL_BUFS;
1644 err:
1645 while (i > 0) {
1646 --i;
1647 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1648 rx_buf_size, DMA_FROM_DEVICE);
1649 kfree(tun_qp->ring[i].addr);
1650 }
1651 kfree(tun_qp->ring);
1652 tun_qp->ring = NULL;
1653 return -ENOMEM;
1654 }
1655
mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx * ctx,enum ib_qp_type qp_type,int is_tun)1656 static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1657 enum ib_qp_type qp_type, int is_tun)
1658 {
1659 int i;
1660 struct mlx4_ib_demux_pv_qp *tun_qp;
1661 int rx_buf_size, tx_buf_size;
1662
1663 if (qp_type > IB_QPT_GSI)
1664 return;
1665
1666 tun_qp = &ctx->qp[qp_type];
1667 if (is_tun) {
1668 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1669 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1670 } else {
1671 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1672 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1673 }
1674
1675
1676 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1677 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1678 rx_buf_size, DMA_FROM_DEVICE);
1679 kfree(tun_qp->ring[i].addr);
1680 }
1681
1682 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1683 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1684 tx_buf_size, DMA_TO_DEVICE);
1685 kfree(tun_qp->tx_ring[i].buf.addr);
1686 if (tun_qp->tx_ring[i].ah)
1687 ib_destroy_ah(tun_qp->tx_ring[i].ah);
1688 }
1689 kfree(tun_qp->tx_ring);
1690 kfree(tun_qp->ring);
1691 }
1692
mlx4_ib_tunnel_comp_worker(struct work_struct * work)1693 static void mlx4_ib_tunnel_comp_worker(struct work_struct *work)
1694 {
1695 struct mlx4_ib_demux_pv_ctx *ctx;
1696 struct mlx4_ib_demux_pv_qp *tun_qp;
1697 struct ib_wc wc;
1698 int ret;
1699 ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1700 ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1701
1702 while (ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1703 tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1704 if (wc.status == IB_WC_SUCCESS) {
1705 switch (wc.opcode) {
1706 case IB_WC_RECV:
1707 mlx4_ib_multiplex_mad(ctx, &wc);
1708 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp,
1709 wc.wr_id &
1710 (MLX4_NUM_TUNNEL_BUFS - 1));
1711 if (ret)
1712 pr_err("Failed reposting tunnel "
1713 "buf:%lld\n", (unsigned long long)wc.wr_id);
1714 break;
1715 case IB_WC_SEND:
1716 pr_debug("received tunnel send completion:"
1717 "wrid=0x%llx, status=0x%x\n",
1718 (unsigned long long)wc.wr_id, wc.status);
1719 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1720 (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1721 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1722 = NULL;
1723 spin_lock(&tun_qp->tx_lock);
1724 tun_qp->tx_ix_tail++;
1725 spin_unlock(&tun_qp->tx_lock);
1726
1727 break;
1728 default:
1729 break;
1730 }
1731 } else {
1732 pr_debug("mlx4_ib: completion error in tunnel: %d."
1733 " status = %d, wrid = 0x%llx\n",
1734 ctx->slave, wc.status, (unsigned long long)wc.wr_id);
1735 if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1736 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1737 (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1738 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1739 = NULL;
1740 spin_lock(&tun_qp->tx_lock);
1741 tun_qp->tx_ix_tail++;
1742 spin_unlock(&tun_qp->tx_lock);
1743 }
1744 }
1745 }
1746 }
1747
pv_qp_event_handler(struct ib_event * event,void * qp_context)1748 static void pv_qp_event_handler(struct ib_event *event, void *qp_context)
1749 {
1750 struct mlx4_ib_demux_pv_ctx *sqp = qp_context;
1751
1752 /* It's worse than that! He's dead, Jim! */
1753 pr_err("Fatal error (%d) on a MAD QP on port %d\n",
1754 event->event, sqp->port);
1755 }
1756
create_pv_sqp(struct mlx4_ib_demux_pv_ctx * ctx,enum ib_qp_type qp_type,int create_tun)1757 static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx,
1758 enum ib_qp_type qp_type, int create_tun)
1759 {
1760 int i, ret;
1761 struct mlx4_ib_demux_pv_qp *tun_qp;
1762 struct mlx4_ib_qp_tunnel_init_attr qp_init_attr;
1763 struct ib_qp_attr attr;
1764 int qp_attr_mask_INIT;
1765
1766 if (qp_type > IB_QPT_GSI)
1767 return -EINVAL;
1768
1769 tun_qp = &ctx->qp[qp_type];
1770
1771 memset(&qp_init_attr, 0, sizeof qp_init_attr);
1772 qp_init_attr.init_attr.send_cq = ctx->cq;
1773 qp_init_attr.init_attr.recv_cq = ctx->cq;
1774 qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
1775 qp_init_attr.init_attr.cap.max_send_wr = MLX4_NUM_TUNNEL_BUFS;
1776 qp_init_attr.init_attr.cap.max_recv_wr = MLX4_NUM_TUNNEL_BUFS;
1777 qp_init_attr.init_attr.cap.max_send_sge = 1;
1778 qp_init_attr.init_attr.cap.max_recv_sge = 1;
1779 if (create_tun) {
1780 qp_init_attr.init_attr.qp_type = IB_QPT_UD;
1781 qp_init_attr.init_attr.create_flags =
1782 (enum ib_qp_create_flags)MLX4_IB_SRIOV_TUNNEL_QP;
1783 qp_init_attr.port = ctx->port;
1784 qp_init_attr.slave = ctx->slave;
1785 qp_init_attr.proxy_qp_type = qp_type;
1786 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX |
1787 IB_QP_QKEY | IB_QP_PORT;
1788 } else {
1789 qp_init_attr.init_attr.qp_type = qp_type;
1790 qp_init_attr.init_attr.create_flags =
1791 (enum ib_qp_create_flags)MLX4_IB_SRIOV_SQP;
1792 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY;
1793 }
1794 qp_init_attr.init_attr.port_num = ctx->port;
1795 qp_init_attr.init_attr.qp_context = ctx;
1796 qp_init_attr.init_attr.event_handler = pv_qp_event_handler;
1797 tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr);
1798 if (IS_ERR(tun_qp->qp)) {
1799 ret = PTR_ERR(tun_qp->qp);
1800 tun_qp->qp = NULL;
1801 pr_err("Couldn't create %s QP (%d)\n",
1802 create_tun ? "tunnel" : "special", ret);
1803 return ret;
1804 }
1805
1806 memset(&attr, 0, sizeof attr);
1807 attr.qp_state = IB_QPS_INIT;
1808 ret = 0;
1809 if (create_tun)
1810 ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave,
1811 ctx->port, IB_DEFAULT_PKEY_FULL,
1812 &attr.pkey_index);
1813 if (ret || !create_tun)
1814 attr.pkey_index =
1815 to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0];
1816 attr.qkey = IB_QP1_QKEY;
1817 attr.port_num = ctx->port;
1818 ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT);
1819 if (ret) {
1820 pr_err("Couldn't change %s qp state to INIT (%d)\n",
1821 create_tun ? "tunnel" : "special", ret);
1822 goto err_qp;
1823 }
1824 attr.qp_state = IB_QPS_RTR;
1825 ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE);
1826 if (ret) {
1827 pr_err("Couldn't change %s qp state to RTR (%d)\n",
1828 create_tun ? "tunnel" : "special", ret);
1829 goto err_qp;
1830 }
1831 attr.qp_state = IB_QPS_RTS;
1832 attr.sq_psn = 0;
1833 ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN);
1834 if (ret) {
1835 pr_err("Couldn't change %s qp state to RTS (%d)\n",
1836 create_tun ? "tunnel" : "special", ret);
1837 goto err_qp;
1838 }
1839
1840 for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1841 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i);
1842 if (ret) {
1843 pr_err(" mlx4_ib_post_pv_buf error"
1844 " (err = %d, i = %d)\n", ret, i);
1845 goto err_qp;
1846 }
1847 }
1848 return 0;
1849
1850 err_qp:
1851 ib_destroy_qp(tun_qp->qp);
1852 tun_qp->qp = NULL;
1853 return ret;
1854 }
1855
1856 /*
1857 * IB MAD completion callback for real SQPs
1858 */
mlx4_ib_sqp_comp_worker(struct work_struct * work)1859 static void mlx4_ib_sqp_comp_worker(struct work_struct *work)
1860 {
1861 struct mlx4_ib_demux_pv_ctx *ctx;
1862 struct mlx4_ib_demux_pv_qp *sqp;
1863 struct ib_wc wc;
1864 struct ib_grh *grh;
1865 struct ib_mad *mad;
1866
1867 ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1868 ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1869
1870 while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1871 sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1872 if (wc.status == IB_WC_SUCCESS) {
1873 switch (wc.opcode) {
1874 case IB_WC_SEND:
1875 ib_destroy_ah(sqp->tx_ring[wc.wr_id &
1876 (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1877 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1878 = NULL;
1879 spin_lock(&sqp->tx_lock);
1880 sqp->tx_ix_tail++;
1881 spin_unlock(&sqp->tx_lock);
1882 break;
1883 case IB_WC_RECV:
1884 mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *)
1885 (sqp->ring[wc.wr_id &
1886 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->payload);
1887 grh = &(((struct mlx4_mad_rcv_buf *)
1888 (sqp->ring[wc.wr_id &
1889 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->grh);
1890 mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad);
1891 if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id &
1892 (MLX4_NUM_TUNNEL_BUFS - 1)))
1893 pr_err("Failed reposting SQP "
1894 "buf:%lld\n", (unsigned long long)wc.wr_id);
1895 break;
1896 default:
1897 BUG_ON(1);
1898 break;
1899 }
1900 } else {
1901 pr_debug("mlx4_ib: completion error in tunnel: %d."
1902 " status = %d, wrid = 0x%llx\n",
1903 ctx->slave, wc.status, (unsigned long long)wc.wr_id);
1904 if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1905 ib_destroy_ah(sqp->tx_ring[wc.wr_id &
1906 (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1907 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1908 = NULL;
1909 spin_lock(&sqp->tx_lock);
1910 sqp->tx_ix_tail++;
1911 spin_unlock(&sqp->tx_lock);
1912 }
1913 }
1914 }
1915 }
1916
alloc_pv_object(struct mlx4_ib_dev * dev,int slave,int port,struct mlx4_ib_demux_pv_ctx ** ret_ctx)1917 static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port,
1918 struct mlx4_ib_demux_pv_ctx **ret_ctx)
1919 {
1920 struct mlx4_ib_demux_pv_ctx *ctx;
1921
1922 *ret_ctx = NULL;
1923 ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL);
1924 if (!ctx) {
1925 pr_err("failed allocating pv resource context "
1926 "for port %d, slave %d\n", port, slave);
1927 return -ENOMEM;
1928 }
1929
1930 ctx->ib_dev = &dev->ib_dev;
1931 ctx->port = port;
1932 ctx->slave = slave;
1933 *ret_ctx = ctx;
1934 return 0;
1935 }
1936
free_pv_object(struct mlx4_ib_dev * dev,int slave,int port)1937 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port)
1938 {
1939 if (dev->sriov.demux[port - 1].tun[slave]) {
1940 kfree(dev->sriov.demux[port - 1].tun[slave]);
1941 dev->sriov.demux[port - 1].tun[slave] = NULL;
1942 }
1943 }
1944
create_pv_resources(struct ib_device * ibdev,int slave,int port,int create_tun,struct mlx4_ib_demux_pv_ctx * ctx)1945 static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
1946 int create_tun, struct mlx4_ib_demux_pv_ctx *ctx)
1947 {
1948 int ret, cq_size;
1949 struct ib_cq_init_attr cq_attr = {};
1950
1951 if (ctx->state != DEMUX_PV_STATE_DOWN)
1952 return -EEXIST;
1953
1954 ctx->state = DEMUX_PV_STATE_STARTING;
1955 /* have QP0 only if link layer is IB */
1956 if (rdma_port_get_link_layer(ibdev, ctx->port) ==
1957 IB_LINK_LAYER_INFINIBAND)
1958 ctx->has_smi = 1;
1959
1960 if (ctx->has_smi) {
1961 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun);
1962 if (ret) {
1963 pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret);
1964 goto err_out;
1965 }
1966 }
1967
1968 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun);
1969 if (ret) {
1970 pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret);
1971 goto err_out_qp0;
1972 }
1973
1974 cq_size = 2 * MLX4_NUM_TUNNEL_BUFS;
1975 if (ctx->has_smi)
1976 cq_size *= 2;
1977
1978 cq_attr.cqe = cq_size;
1979 ctx->cq = ib_create_cq(ctx->ib_dev, mlx4_ib_tunnel_comp_handler,
1980 NULL, ctx, &cq_attr);
1981 if (IS_ERR(ctx->cq)) {
1982 ret = PTR_ERR(ctx->cq);
1983 pr_err("Couldn't create tunnel CQ (%d)\n", ret);
1984 goto err_buf;
1985 }
1986
1987 ctx->pd = ib_alloc_pd(ctx->ib_dev, 0);
1988 if (IS_ERR(ctx->pd)) {
1989 ret = PTR_ERR(ctx->pd);
1990 pr_err("Couldn't create tunnel PD (%d)\n", ret);
1991 goto err_cq;
1992 }
1993
1994 if (ctx->has_smi) {
1995 ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun);
1996 if (ret) {
1997 pr_err("Couldn't create %s QP0 (%d)\n",
1998 create_tun ? "tunnel for" : "", ret);
1999 goto err_pd;
2000 }
2001 }
2002
2003 ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun);
2004 if (ret) {
2005 pr_err("Couldn't create %s QP1 (%d)\n",
2006 create_tun ? "tunnel for" : "", ret);
2007 goto err_qp0;
2008 }
2009
2010 if (create_tun)
2011 INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker);
2012 else
2013 INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker);
2014
2015 ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq;
2016
2017 ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
2018 if (ret) {
2019 pr_err("Couldn't arm tunnel cq (%d)\n", ret);
2020 goto err_wq;
2021 }
2022 ctx->state = DEMUX_PV_STATE_ACTIVE;
2023 return 0;
2024
2025 err_wq:
2026 ctx->wq = NULL;
2027 ib_destroy_qp(ctx->qp[1].qp);
2028 ctx->qp[1].qp = NULL;
2029
2030
2031 err_qp0:
2032 if (ctx->has_smi)
2033 ib_destroy_qp(ctx->qp[0].qp);
2034 ctx->qp[0].qp = NULL;
2035
2036 err_pd:
2037 ib_dealloc_pd(ctx->pd);
2038 ctx->pd = NULL;
2039
2040 err_cq:
2041 ib_destroy_cq(ctx->cq);
2042 ctx->cq = NULL;
2043
2044 err_buf:
2045 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun);
2046
2047 err_out_qp0:
2048 if (ctx->has_smi)
2049 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun);
2050 err_out:
2051 ctx->state = DEMUX_PV_STATE_DOWN;
2052 return ret;
2053 }
2054
destroy_pv_resources(struct mlx4_ib_dev * dev,int slave,int port,struct mlx4_ib_demux_pv_ctx * ctx,int flush)2055 static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port,
2056 struct mlx4_ib_demux_pv_ctx *ctx, int flush)
2057 {
2058 if (!ctx)
2059 return;
2060 if (ctx->state > DEMUX_PV_STATE_DOWN) {
2061 ctx->state = DEMUX_PV_STATE_DOWNING;
2062 if (flush)
2063 flush_workqueue(ctx->wq);
2064 if (ctx->has_smi) {
2065 ib_destroy_qp(ctx->qp[0].qp);
2066 ctx->qp[0].qp = NULL;
2067 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1);
2068 }
2069 ib_destroy_qp(ctx->qp[1].qp);
2070 ctx->qp[1].qp = NULL;
2071 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1);
2072 ib_dealloc_pd(ctx->pd);
2073 ctx->pd = NULL;
2074 ib_destroy_cq(ctx->cq);
2075 ctx->cq = NULL;
2076 ctx->state = DEMUX_PV_STATE_DOWN;
2077 }
2078 }
2079
mlx4_ib_tunnels_update(struct mlx4_ib_dev * dev,int slave,int port,int do_init)2080 static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave,
2081 int port, int do_init)
2082 {
2083 int ret = 0;
2084
2085 if (!do_init) {
2086 clean_vf_mcast(&dev->sriov.demux[port - 1], slave);
2087 /* for master, destroy real sqp resources */
2088 if (slave == mlx4_master_func_num(dev->dev))
2089 destroy_pv_resources(dev, slave, port,
2090 dev->sriov.sqps[port - 1], 1);
2091 /* destroy the tunnel qp resources */
2092 destroy_pv_resources(dev, slave, port,
2093 dev->sriov.demux[port - 1].tun[slave], 1);
2094 return 0;
2095 }
2096
2097 /* create the tunnel qp resources */
2098 ret = create_pv_resources(&dev->ib_dev, slave, port, 1,
2099 dev->sriov.demux[port - 1].tun[slave]);
2100
2101 /* for master, create the real sqp resources */
2102 if (!ret && slave == mlx4_master_func_num(dev->dev))
2103 ret = create_pv_resources(&dev->ib_dev, slave, port, 0,
2104 dev->sriov.sqps[port - 1]);
2105 return ret;
2106 }
2107
mlx4_ib_tunnels_update_work(struct work_struct * work)2108 void mlx4_ib_tunnels_update_work(struct work_struct *work)
2109 {
2110 struct mlx4_ib_demux_work *dmxw;
2111
2112 dmxw = container_of(work, struct mlx4_ib_demux_work, work);
2113 mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port,
2114 dmxw->do_init);
2115 kfree(dmxw);
2116 return;
2117 }
2118
mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev * dev,struct mlx4_ib_demux_ctx * ctx,int port)2119 static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev,
2120 struct mlx4_ib_demux_ctx *ctx,
2121 int port)
2122 {
2123 char name[12];
2124 int ret = 0;
2125 int i;
2126
2127 ctx->tun = kcalloc(dev->dev->caps.sqp_demux,
2128 sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL);
2129 if (!ctx->tun)
2130 return -ENOMEM;
2131
2132 ctx->dev = dev;
2133 ctx->port = port;
2134 ctx->ib_dev = &dev->ib_dev;
2135
2136 for (i = 0;
2137 i < min(dev->dev->caps.sqp_demux,
2138 (u16)(dev->dev->persist->num_vfs + 1));
2139 i++) {
2140 struct mlx4_active_ports actv_ports =
2141 mlx4_get_active_ports(dev->dev, i);
2142
2143 if (!test_bit(port - 1, actv_ports.ports))
2144 continue;
2145
2146 ret = alloc_pv_object(dev, i, port, &ctx->tun[i]);
2147 if (ret) {
2148 ret = -ENOMEM;
2149 goto err_mcg;
2150 }
2151 }
2152
2153 ret = mlx4_ib_mcg_port_init(ctx);
2154 if (ret) {
2155 pr_err("Failed initializing mcg para-virt (%d)\n", ret);
2156 goto err_mcg;
2157 }
2158
2159 snprintf(name, sizeof name, "mlx4_ibt%d", port);
2160 ctx->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2161 if (!ctx->wq) {
2162 pr_err("Failed to create tunnelling WQ for port %d\n", port);
2163 ret = -ENOMEM;
2164 goto err_wq;
2165 }
2166
2167 snprintf(name, sizeof name, "mlx4_ibud%d", port);
2168 ctx->ud_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2169 if (!ctx->ud_wq) {
2170 pr_err("Failed to create up/down WQ for port %d\n", port);
2171 ret = -ENOMEM;
2172 goto err_udwq;
2173 }
2174
2175 return 0;
2176
2177 err_udwq:
2178 destroy_workqueue(ctx->wq);
2179 ctx->wq = NULL;
2180
2181 err_wq:
2182 mlx4_ib_mcg_port_cleanup(ctx, 1);
2183 err_mcg:
2184 for (i = 0; i < dev->dev->caps.sqp_demux; i++)
2185 free_pv_object(dev, i, port);
2186 kfree(ctx->tun);
2187 ctx->tun = NULL;
2188 return ret;
2189 }
2190
mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx * sqp_ctx)2191 static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx)
2192 {
2193 if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) {
2194 sqp_ctx->state = DEMUX_PV_STATE_DOWNING;
2195 flush_workqueue(sqp_ctx->wq);
2196 if (sqp_ctx->has_smi) {
2197 ib_destroy_qp(sqp_ctx->qp[0].qp);
2198 sqp_ctx->qp[0].qp = NULL;
2199 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0);
2200 }
2201 ib_destroy_qp(sqp_ctx->qp[1].qp);
2202 sqp_ctx->qp[1].qp = NULL;
2203 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0);
2204 ib_dealloc_pd(sqp_ctx->pd);
2205 sqp_ctx->pd = NULL;
2206 ib_destroy_cq(sqp_ctx->cq);
2207 sqp_ctx->cq = NULL;
2208 sqp_ctx->state = DEMUX_PV_STATE_DOWN;
2209 }
2210 }
2211
mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx * ctx)2212 static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx)
2213 {
2214 int i;
2215 if (ctx) {
2216 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
2217 mlx4_ib_mcg_port_cleanup(ctx, 1);
2218 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2219 if (!ctx->tun[i])
2220 continue;
2221 if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN)
2222 ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING;
2223 }
2224 flush_workqueue(ctx->wq);
2225 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2226 destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0);
2227 free_pv_object(dev, i, ctx->port);
2228 }
2229 kfree(ctx->tun);
2230 destroy_workqueue(ctx->ud_wq);
2231 destroy_workqueue(ctx->wq);
2232 }
2233 }
2234
mlx4_ib_master_tunnels(struct mlx4_ib_dev * dev,int do_init)2235 static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init)
2236 {
2237 int i;
2238
2239 if (!mlx4_is_master(dev->dev))
2240 return;
2241 /* initialize or tear down tunnel QPs for the master */
2242 for (i = 0; i < dev->dev->caps.num_ports; i++)
2243 mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init);
2244 return;
2245 }
2246
mlx4_ib_init_sriov(struct mlx4_ib_dev * dev)2247 int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev)
2248 {
2249 int i = 0;
2250 int err;
2251
2252 if (!mlx4_is_mfunc(dev->dev))
2253 return 0;
2254
2255 dev->sriov.is_going_down = 0;
2256 spin_lock_init(&dev->sriov.going_down_lock);
2257 mlx4_ib_cm_paravirt_init(dev);
2258
2259 mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n");
2260
2261 if (mlx4_is_slave(dev->dev)) {
2262 mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n");
2263 return 0;
2264 }
2265
2266 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2267 if (i == mlx4_master_func_num(dev->dev))
2268 mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid);
2269 else
2270 mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid());
2271 }
2272
2273 err = mlx4_ib_init_alias_guid_service(dev);
2274 if (err) {
2275 mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n");
2276 goto paravirt_err;
2277 }
2278 err = mlx4_ib_device_register_sysfs(dev);
2279 if (err) {
2280 mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n");
2281 goto sysfs_err;
2282 }
2283
2284 mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n",
2285 dev->dev->caps.sqp_demux);
2286 for (i = 0; i < dev->num_ports; i++) {
2287 union ib_gid gid;
2288 err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1);
2289 if (err)
2290 goto demux_err;
2291 dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id;
2292 atomic64_set(&dev->sriov.demux[i].subnet_prefix,
2293 be64_to_cpu(gid.global.subnet_prefix));
2294 err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1,
2295 &dev->sriov.sqps[i]);
2296 if (err)
2297 goto demux_err;
2298 err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1);
2299 if (err)
2300 goto free_pv;
2301 }
2302 mlx4_ib_master_tunnels(dev, 1);
2303 return 0;
2304
2305 free_pv:
2306 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2307 demux_err:
2308 while (--i >= 0) {
2309 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2310 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2311 }
2312 mlx4_ib_device_unregister_sysfs(dev);
2313
2314 sysfs_err:
2315 mlx4_ib_destroy_alias_guid_service(dev);
2316
2317 paravirt_err:
2318 mlx4_ib_cm_paravirt_clean(dev, -1);
2319
2320 return err;
2321 }
2322
mlx4_ib_close_sriov(struct mlx4_ib_dev * dev)2323 void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev)
2324 {
2325 int i;
2326 unsigned long flags;
2327
2328 if (!mlx4_is_mfunc(dev->dev))
2329 return;
2330
2331 spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
2332 dev->sriov.is_going_down = 1;
2333 spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
2334 if (mlx4_is_master(dev->dev)) {
2335 for (i = 0; i < dev->num_ports; i++) {
2336 flush_workqueue(dev->sriov.demux[i].ud_wq);
2337 mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]);
2338 kfree(dev->sriov.sqps[i]);
2339 dev->sriov.sqps[i] = NULL;
2340 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2341 }
2342
2343 mlx4_ib_cm_paravirt_clean(dev, -1);
2344 mlx4_ib_destroy_alias_guid_service(dev);
2345 mlx4_ib_device_unregister_sysfs(dev);
2346 }
2347 }
2348