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e586b3b0 AV |
1 | /* |
2 | * Copyright (c) 2015, Mellanox Technologies. 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 "en.h" | |
34 | ||
1f5b1e47 TT |
35 | static inline void mlx5e_poll_ico_single_cqe(struct mlx5e_cq *cq, |
36 | struct mlx5e_icosq *sq, | |
37 | struct mlx5_cqe64 *cqe, | |
38 | u16 *sqcc) | |
39 | { | |
40 | struct mlx5_wq_cyc *wq = &sq->wq; | |
41 | u16 ci = be16_to_cpu(cqe->wqe_counter) & wq->sz_m1; | |
42 | struct mlx5e_sq_wqe_info *icowi = &sq->db.ico_wqe[ci]; | |
43 | struct mlx5e_rq *rq = &sq->channel->rq; | |
44 | ||
45 | prefetch(rq); | |
46 | mlx5_cqwq_pop(&cq->wq); | |
47 | *sqcc += icowi->num_wqebbs; | |
48 | ||
49 | if (unlikely((cqe->op_own >> 4) != MLX5_CQE_REQ)) { | |
50 | WARN_ONCE(true, "mlx5e: Bad OP in ICOSQ CQE: 0x%x\n", | |
51 | cqe->op_own); | |
52 | return; | |
53 | } | |
54 | ||
55 | if (likely(icowi->opcode == MLX5_OPCODE_UMR)) { | |
56 | mlx5e_post_rx_mpwqe(rq); | |
57 | return; | |
58 | } | |
59 | ||
60 | if (unlikely(icowi->opcode != MLX5_OPCODE_NOP)) | |
61 | WARN_ONCE(true, | |
62 | "mlx5e: Bad OPCODE in ICOSQ WQE info: 0x%x\n", | |
63 | icowi->opcode); | |
64 | } | |
65 | ||
d3c9bc27 TT |
66 | static void mlx5e_poll_ico_cq(struct mlx5e_cq *cq) |
67 | { | |
31391048 | 68 | struct mlx5e_icosq *sq = container_of(cq, struct mlx5e_icosq, cq); |
d3c9bc27 | 69 | struct mlx5_cqe64 *cqe; |
d3c9bc27 TT |
70 | u16 sqcc; |
71 | ||
c0f1147d | 72 | if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state))) |
6e8dd6d6 SM |
73 | return; |
74 | ||
4b673793 | 75 | cqe = mlx5_cqwq_get_cqe(&cq->wq); |
d3c9bc27 TT |
76 | if (likely(!cqe)) |
77 | return; | |
78 | ||
d3c9bc27 TT |
79 | /* sq->cc must be updated only after mlx5_cqwq_update_db_record(), |
80 | * otherwise a cq overrun may occur | |
81 | */ | |
82 | sqcc = sq->cc; | |
83 | ||
1f5b1e47 TT |
84 | /* by design, there's only a single cqe */ |
85 | mlx5e_poll_ico_single_cqe(cq, sq, cqe, &sqcc); | |
d3c9bc27 TT |
86 | |
87 | mlx5_cqwq_update_db_record(&cq->wq); | |
88 | ||
89 | /* ensure cq space is freed before enabling more cqes */ | |
90 | wmb(); | |
91 | ||
92 | sq->cc = sqcc; | |
93 | } | |
94 | ||
e586b3b0 AV |
95 | int mlx5e_napi_poll(struct napi_struct *napi, int budget) |
96 | { | |
97 | struct mlx5e_channel *c = container_of(napi, struct mlx5e_channel, | |
98 | napi); | |
99 | bool busy = false; | |
44fb6fbb | 100 | int work_done; |
e586b3b0 AV |
101 | int i; |
102 | ||
103 | clear_bit(MLX5E_CHANNEL_NAPI_SCHED, &c->flags); | |
104 | ||
105 | for (i = 0; i < c->num_tc; i++) | |
8ec736e5 | 106 | busy |= mlx5e_poll_tx_cq(&c->sq[i].cq, budget); |
e586b3b0 | 107 | |
b5503b99 | 108 | if (c->xdp) |
31871f87 | 109 | busy |= mlx5e_poll_xdpsq_cq(&c->rq.xdpsq.cq); |
b5503b99 | 110 | |
39e12351 SM |
111 | work_done = mlx5e_poll_rx_cq(&c->rq.cq, budget); |
112 | busy |= work_done == budget; | |
113 | ||
d3c9bc27 TT |
114 | mlx5e_poll_ico_cq(&c->icosq.cq); |
115 | ||
e3391054 | 116 | busy |= mlx5e_post_rx_wqes(&c->rq); |
e586b3b0 AV |
117 | |
118 | if (busy) | |
119 | return budget; | |
120 | ||
44fb6fbb | 121 | napi_complete_done(napi, work_done); |
e586b3b0 AV |
122 | |
123 | /* avoid losing completion event during/after polling cqs */ | |
124 | if (test_bit(MLX5E_CHANNEL_NAPI_SCHED, &c->flags)) { | |
125 | napi_schedule(napi); | |
44fb6fbb | 126 | return work_done; |
e586b3b0 AV |
127 | } |
128 | ||
129 | for (i = 0; i < c->num_tc; i++) | |
130 | mlx5e_cq_arm(&c->sq[i].cq); | |
cb3c7fd4 GR |
131 | |
132 | if (test_bit(MLX5E_RQ_STATE_AM, &c->rq.state)) | |
133 | mlx5e_rx_am(&c->rq); | |
134 | ||
e586b3b0 | 135 | mlx5e_cq_arm(&c->rq.cq); |
d3c9bc27 | 136 | mlx5e_cq_arm(&c->icosq.cq); |
e586b3b0 | 137 | |
44fb6fbb | 138 | return work_done; |
e586b3b0 AV |
139 | } |
140 | ||
141 | void mlx5e_completion_event(struct mlx5_core_cq *mcq) | |
142 | { | |
143 | struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq); | |
144 | ||
cb3c7fd4 | 145 | cq->event_ctr++; |
e586b3b0 | 146 | set_bit(MLX5E_CHANNEL_NAPI_SCHED, &cq->channel->flags); |
e586b3b0 AV |
147 | napi_schedule(cq->napi); |
148 | } | |
149 | ||
150 | void mlx5e_cq_error_event(struct mlx5_core_cq *mcq, enum mlx5_event event) | |
151 | { | |
152 | struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq); | |
153 | struct mlx5e_channel *c = cq->channel; | |
a43b25da | 154 | struct net_device *netdev = c->netdev; |
e586b3b0 AV |
155 | |
156 | netdev_err(netdev, "%s: cqn=0x%.6x event=0x%.2x\n", | |
157 | __func__, mcq->cqn, event); | |
158 | } |