2 * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
35 struct mlx5_ib_gsi_wr {
41 static bool mlx5_ib_deth_sqpn_cap(struct mlx5_ib_dev *dev)
43 return MLX5_CAP_GEN(dev->mdev, set_deth_sqpn);
46 /* Call with gsi->lock locked */
47 static void generate_completions(struct mlx5_ib_qp *mqp)
49 struct mlx5_ib_gsi_qp *gsi = &mqp->gsi;
50 struct ib_cq *gsi_cq = mqp->ibqp.send_cq;
51 struct mlx5_ib_gsi_wr *wr;
54 for (index = gsi->outstanding_ci; index != gsi->outstanding_pi;
56 wr = &gsi->outstanding_wrs[index % gsi->cap.max_send_wr];
61 WARN_ON_ONCE(mlx5_ib_generate_wc(gsi_cq, &wr->wc));
62 wr->completed = false;
65 gsi->outstanding_ci = index;
68 static void handle_single_completion(struct ib_cq *cq, struct ib_wc *wc)
70 struct mlx5_ib_gsi_qp *gsi = cq->cq_context;
71 struct mlx5_ib_gsi_wr *wr =
72 container_of(wc->wr_cqe, struct mlx5_ib_gsi_wr, cqe);
73 struct mlx5_ib_qp *mqp = container_of(gsi, struct mlx5_ib_qp, gsi);
77 spin_lock_irqsave(&gsi->lock, flags);
82 wr->wc.qp = &mqp->ibqp;
84 generate_completions(mqp);
85 spin_unlock_irqrestore(&gsi->lock, flags);
88 int mlx5_ib_create_gsi(struct ib_pd *pd, struct mlx5_ib_qp *mqp,
89 struct ib_qp_init_attr *attr)
91 struct mlx5_ib_dev *dev = to_mdev(pd->device);
92 struct mlx5_ib_gsi_qp *gsi;
93 struct ib_qp_init_attr hw_init_attr = *attr;
94 const u8 port_num = attr->port_num;
98 if (mlx5_ib_deth_sqpn_cap(dev)) {
99 if (MLX5_CAP_GEN(dev->mdev,
100 port_type) == MLX5_CAP_PORT_TYPE_IB)
101 num_qps = pd->device->attrs.max_pkeys;
102 else if (dev->lag_active)
103 num_qps = MLX5_MAX_PORTS;
107 gsi->tx_qps = kcalloc(num_qps, sizeof(*gsi->tx_qps), GFP_KERNEL);
111 gsi->outstanding_wrs =
112 kcalloc(attr->cap.max_send_wr, sizeof(*gsi->outstanding_wrs),
114 if (!gsi->outstanding_wrs) {
119 if (dev->devr.ports[port_num - 1].gsi) {
120 mlx5_ib_warn(dev, "GSI QP already exists on port %d\n",
125 gsi->num_qps = num_qps;
126 spin_lock_init(&gsi->lock);
128 gsi->cap = attr->cap;
129 gsi->port_num = port_num;
131 gsi->cq = ib_alloc_cq(pd->device, gsi, attr->cap.max_send_wr, 0,
133 if (IS_ERR(gsi->cq)) {
134 mlx5_ib_warn(dev, "unable to create send CQ for GSI QP. error %ld\n",
136 ret = PTR_ERR(gsi->cq);
140 hw_init_attr.qp_type = MLX5_IB_QPT_HW_GSI;
141 hw_init_attr.send_cq = gsi->cq;
143 hw_init_attr.cap.max_send_wr = 0;
144 hw_init_attr.cap.max_send_sge = 0;
145 hw_init_attr.cap.max_inline_data = 0;
148 gsi->rx_qp = ib_create_qp(pd, &hw_init_attr);
149 if (IS_ERR(gsi->rx_qp)) {
150 mlx5_ib_warn(dev, "unable to create hardware GSI QP. error %ld\n",
151 PTR_ERR(gsi->rx_qp));
152 ret = PTR_ERR(gsi->rx_qp);
156 dev->devr.ports[attr->port_num - 1].gsi = gsi;
162 kfree(gsi->outstanding_wrs);
168 int mlx5_ib_destroy_gsi(struct mlx5_ib_qp *mqp)
170 struct mlx5_ib_dev *dev = to_mdev(mqp->ibqp.device);
171 struct mlx5_ib_gsi_qp *gsi = &mqp->gsi;
172 const int port_num = gsi->port_num;
176 ret = ib_destroy_qp(gsi->rx_qp);
178 mlx5_ib_warn(dev, "unable to destroy hardware GSI QP. error %d\n",
182 dev->devr.ports[port_num - 1].gsi = NULL;
185 for (qp_index = 0; qp_index < gsi->num_qps; ++qp_index) {
186 if (!gsi->tx_qps[qp_index])
188 WARN_ON_ONCE(ib_destroy_qp(gsi->tx_qps[qp_index]));
189 gsi->tx_qps[qp_index] = NULL;
194 kfree(gsi->outstanding_wrs);
199 static struct ib_qp *create_gsi_ud_qp(struct mlx5_ib_gsi_qp *gsi)
201 struct ib_pd *pd = gsi->rx_qp->pd;
202 struct ib_qp_init_attr init_attr = {
203 .event_handler = gsi->rx_qp->event_handler,
204 .qp_context = gsi->rx_qp->qp_context,
206 .recv_cq = gsi->rx_qp->recv_cq,
208 .max_send_wr = gsi->cap.max_send_wr,
209 .max_send_sge = gsi->cap.max_send_sge,
210 .max_inline_data = gsi->cap.max_inline_data,
212 .qp_type = IB_QPT_UD,
213 .create_flags = MLX5_IB_QP_CREATE_SQPN_QP1,
216 return ib_create_qp(pd, &init_attr);
219 static int modify_to_rts(struct mlx5_ib_gsi_qp *gsi, struct ib_qp *qp,
222 struct mlx5_ib_dev *dev = to_mdev(qp->device);
223 struct ib_qp_attr attr;
227 mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY | IB_QP_PORT;
228 attr.qp_state = IB_QPS_INIT;
229 attr.pkey_index = pkey_index;
230 attr.qkey = IB_QP1_QKEY;
231 attr.port_num = gsi->port_num;
232 ret = ib_modify_qp(qp, &attr, mask);
234 mlx5_ib_err(dev, "could not change QP%d state to INIT: %d\n",
239 attr.qp_state = IB_QPS_RTR;
240 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
242 mlx5_ib_err(dev, "could not change QP%d state to RTR: %d\n",
247 attr.qp_state = IB_QPS_RTS;
249 ret = ib_modify_qp(qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN);
251 mlx5_ib_err(dev, "could not change QP%d state to RTS: %d\n",
259 static void setup_qp(struct mlx5_ib_gsi_qp *gsi, u16 qp_index)
261 struct ib_device *device = gsi->rx_qp->device;
262 struct mlx5_ib_dev *dev = to_mdev(device);
263 int pkey_index = qp_index;
264 struct mlx5_ib_qp *mqp;
270 if (MLX5_CAP_GEN(dev->mdev, port_type) != MLX5_CAP_PORT_TYPE_IB)
273 ret = ib_query_pkey(device, gsi->port_num, pkey_index, &pkey);
275 mlx5_ib_warn(dev, "unable to read P_Key at port %d, index %d\n",
276 gsi->port_num, qp_index);
281 mlx5_ib_dbg(dev, "invalid P_Key at port %d, index %d. Skipping.\n",
282 gsi->port_num, qp_index);
286 spin_lock_irqsave(&gsi->lock, flags);
287 qp = gsi->tx_qps[qp_index];
288 spin_unlock_irqrestore(&gsi->lock, flags);
290 mlx5_ib_dbg(dev, "already existing GSI TX QP at port %d, index %d. Skipping\n",
291 gsi->port_num, qp_index);
295 qp = create_gsi_ud_qp(gsi);
297 mlx5_ib_warn(dev, "unable to create hardware UD QP for GSI: %ld\n",
304 mqp->gsi_lag_port = qp_index + 1;
305 ret = modify_to_rts(gsi, qp, pkey_index);
309 spin_lock_irqsave(&gsi->lock, flags);
310 WARN_ON_ONCE(gsi->tx_qps[qp_index]);
311 gsi->tx_qps[qp_index] = qp;
312 spin_unlock_irqrestore(&gsi->lock, flags);
320 int mlx5_ib_gsi_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr,
323 struct mlx5_ib_dev *dev = to_mdev(qp->device);
324 struct mlx5_ib_qp *mqp = to_mqp(qp);
325 struct mlx5_ib_gsi_qp *gsi = &mqp->gsi;
329 mlx5_ib_dbg(dev, "modifying GSI QP to state %d\n", attr->qp_state);
331 ret = ib_modify_qp(gsi->rx_qp, attr, attr_mask);
333 mlx5_ib_warn(dev, "unable to modify GSI rx QP: %d\n", ret);
337 if (to_mqp(gsi->rx_qp)->state != IB_QPS_RTS)
340 for (qp_index = 0; qp_index < gsi->num_qps; ++qp_index)
341 setup_qp(gsi, qp_index);
345 int mlx5_ib_gsi_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
347 struct ib_qp_init_attr *qp_init_attr)
349 struct mlx5_ib_qp *mqp = to_mqp(qp);
350 struct mlx5_ib_gsi_qp *gsi = &mqp->gsi;
353 ret = ib_query_qp(gsi->rx_qp, qp_attr, qp_attr_mask, qp_init_attr);
354 qp_init_attr->cap = gsi->cap;
358 /* Call with gsi->lock locked */
359 static int mlx5_ib_add_outstanding_wr(struct mlx5_ib_qp *mqp,
360 struct ib_ud_wr *wr, struct ib_wc *wc)
362 struct mlx5_ib_gsi_qp *gsi = &mqp->gsi;
363 struct mlx5_ib_dev *dev = to_mdev(gsi->rx_qp->device);
364 struct mlx5_ib_gsi_wr *gsi_wr;
366 if (gsi->outstanding_pi == gsi->outstanding_ci + gsi->cap.max_send_wr) {
367 mlx5_ib_warn(dev, "no available GSI work request.\n");
371 gsi_wr = &gsi->outstanding_wrs[gsi->outstanding_pi %
372 gsi->cap.max_send_wr];
373 gsi->outstanding_pi++;
376 memset(&gsi_wr->wc, 0, sizeof(gsi_wr->wc));
377 gsi_wr->wc.pkey_index = wr->pkey_index;
378 gsi_wr->wc.wr_id = wr->wr.wr_id;
381 gsi_wr->completed = true;
384 gsi_wr->cqe.done = &handle_single_completion;
385 wr->wr.wr_cqe = &gsi_wr->cqe;
390 /* Call with gsi->lock locked */
391 static int mlx5_ib_gsi_silent_drop(struct mlx5_ib_qp *mqp, struct ib_ud_wr *wr)
394 { .wr_id = wr->wr.wr_id },
395 .status = IB_WC_SUCCESS,
396 .opcode = IB_WC_SEND,
401 ret = mlx5_ib_add_outstanding_wr(mqp, wr, &wc);
405 generate_completions(mqp);
410 /* Call with gsi->lock locked */
411 static struct ib_qp *get_tx_qp(struct mlx5_ib_gsi_qp *gsi, struct ib_ud_wr *wr)
413 struct mlx5_ib_dev *dev = to_mdev(gsi->rx_qp->device);
414 struct mlx5_ib_ah *ah = to_mah(wr->ah);
415 int qp_index = wr->pkey_index;
420 if (dev->lag_active && ah->xmit_port)
421 qp_index = ah->xmit_port - 1;
423 if (qp_index >= gsi->num_qps)
426 return gsi->tx_qps[qp_index];
429 int mlx5_ib_gsi_post_send(struct ib_qp *qp, const struct ib_send_wr *wr,
430 const struct ib_send_wr **bad_wr)
432 struct mlx5_ib_qp *mqp = to_mqp(qp);
433 struct mlx5_ib_gsi_qp *gsi = &mqp->gsi;
438 for (; wr; wr = wr->next) {
439 struct ib_ud_wr cur_wr = *ud_wr(wr);
441 cur_wr.wr.next = NULL;
443 spin_lock_irqsave(&gsi->lock, flags);
444 tx_qp = get_tx_qp(gsi, &cur_wr);
446 ret = mlx5_ib_gsi_silent_drop(mqp, &cur_wr);
449 spin_unlock_irqrestore(&gsi->lock, flags);
453 ret = mlx5_ib_add_outstanding_wr(mqp, &cur_wr, NULL);
457 ret = ib_post_send(tx_qp, &cur_wr.wr, bad_wr);
459 /* Undo the effect of adding the outstanding wr */
460 gsi->outstanding_pi--;
463 spin_unlock_irqrestore(&gsi->lock, flags);
469 spin_unlock_irqrestore(&gsi->lock, flags);
474 int mlx5_ib_gsi_post_recv(struct ib_qp *qp, const struct ib_recv_wr *wr,
475 const struct ib_recv_wr **bad_wr)
477 struct mlx5_ib_qp *mqp = to_mqp(qp);
478 struct mlx5_ib_gsi_qp *gsi = &mqp->gsi;
480 return ib_post_recv(gsi->rx_qp, wr, bad_wr);
483 void mlx5_ib_gsi_pkey_change(struct mlx5_ib_gsi_qp *gsi)
487 for (qp_index = 0; qp_index < gsi->num_qps; ++qp_index)
488 setup_qp(gsi, qp_index);