Commit | Line | Data |
---|---|---|
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 | ||
a8c2eb15 | 33 | #include <linux/irq.h> |
2c8f80b3 | 34 | #include <linux/indirect_call_wrapper.h> |
e586b3b0 | 35 | #include "en.h" |
159d2131 | 36 | #include "en/xdp.h" |
a7bd4018 | 37 | #include "en/xsk/rx.h" |
db05815b | 38 | #include "en/xsk/tx.h" |
e586b3b0 | 39 | |
a8c2eb15 TT |
40 | static inline bool mlx5e_channel_no_affinity_change(struct mlx5e_channel *c) |
41 | { | |
42 | int current_cpu = smp_processor_id(); | |
43 | const struct cpumask *aff; | |
44 | struct irq_data *idata; | |
45 | ||
46 | idata = irq_desc_get_irq_data(c->irq_desc); | |
47 | aff = irq_data_get_affinity_mask(idata); | |
48 | return cpumask_test_cpu(current_cpu, aff); | |
49 | } | |
50 | ||
cbce4f44 TG |
51 | static void mlx5e_handle_tx_dim(struct mlx5e_txqsq *sq) |
52 | { | |
05909bab | 53 | struct mlx5e_sq_stats *stats = sq->stats; |
f06d0ca4 | 54 | struct dim_sample dim_sample = {}; |
cbce4f44 | 55 | |
0e5c04f6 | 56 | if (unlikely(!test_bit(MLX5E_SQ_STATE_AM, &sq->state))) |
cbce4f44 TG |
57 | return; |
58 | ||
8960b389 | 59 | dim_update_sample(sq->cq.event_ctr, stats->packets, stats->bytes, &dim_sample); |
cbce4f44 TG |
60 | net_dim(&sq->dim, dim_sample); |
61 | } | |
62 | ||
63 | static void mlx5e_handle_rx_dim(struct mlx5e_rq *rq) | |
64 | { | |
05909bab | 65 | struct mlx5e_rq_stats *stats = rq->stats; |
f06d0ca4 | 66 | struct dim_sample dim_sample = {}; |
cbce4f44 | 67 | |
0e5c04f6 | 68 | if (unlikely(!test_bit(MLX5E_RQ_STATE_AM, &rq->state))) |
cbce4f44 TG |
69 | return; |
70 | ||
8960b389 | 71 | dim_update_sample(rq->cq.event_ctr, stats->packets, stats->bytes, &dim_sample); |
cbce4f44 TG |
72 | net_dim(&rq->dim, dim_sample); |
73 | } | |
74 | ||
63d26b49 MM |
75 | void mlx5e_trigger_irq(struct mlx5e_icosq *sq) |
76 | { | |
77 | struct mlx5_wq_cyc *wq = &sq->wq; | |
78 | struct mlx5e_tx_wqe *nopwqe; | |
79 | u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc); | |
80 | ||
41a8e4eb TT |
81 | sq->db.wqe_info[pi] = (struct mlx5e_icosq_wqe_info) { |
82 | .opcode = MLX5_OPCODE_NOP, | |
83 | .num_wqebbs = 1, | |
84 | }; | |
85 | ||
63d26b49 MM |
86 | nopwqe = mlx5e_post_nop(wq, sq->sqn, &sq->pc); |
87 | mlx5e_notify_hw(wq, sq->pc, sq->uar_map, &nopwqe->ctrl); | |
88 | } | |
89 | ||
871aa189 MM |
90 | static bool mlx5e_napi_xsk_post(struct mlx5e_xdpsq *xsksq, struct mlx5e_rq *xskrq) |
91 | { | |
a7bd4018 | 92 | bool busy_xsk = false, xsk_rx_alloc_err; |
871aa189 | 93 | |
a7bd4018 MM |
94 | /* Handle the race between the application querying need_wakeup and the |
95 | * driver setting it: | |
96 | * 1. Update need_wakeup both before and after the TX. If it goes to | |
97 | * "yes", it can only happen with the first update. | |
98 | * 2. If the application queried need_wakeup before we set it, the | |
99 | * packets will be transmitted anyway, even w/o a wakeup. | |
100 | * 3. Give a chance to clear need_wakeup after new packets were queued | |
101 | * for TX. | |
102 | */ | |
103 | mlx5e_xsk_update_tx_wakeup(xsksq); | |
871aa189 | 104 | busy_xsk |= mlx5e_xsk_tx(xsksq, MLX5E_TX_XSK_POLL_BUDGET); |
a7bd4018 MM |
105 | mlx5e_xsk_update_tx_wakeup(xsksq); |
106 | ||
2c8f80b3 TT |
107 | xsk_rx_alloc_err = INDIRECT_CALL_2(xskrq->post_wqes, |
108 | mlx5e_post_rx_mpwqes, | |
109 | mlx5e_post_rx_wqes, | |
110 | xskrq); | |
a7bd4018 | 111 | busy_xsk |= mlx5e_xsk_update_rx_wakeup(xskrq, xsk_rx_alloc_err); |
871aa189 MM |
112 | |
113 | return busy_xsk; | |
114 | } | |
115 | ||
e586b3b0 AV |
116 | int mlx5e_napi_poll(struct napi_struct *napi, int budget) |
117 | { | |
118 | struct mlx5e_channel *c = container_of(napi, struct mlx5e_channel, | |
119 | napi); | |
2d7103c8 | 120 | struct mlx5e_ch_stats *ch_stats = c->stats; |
db05815b MM |
121 | struct mlx5e_xdpsq *xsksq = &c->xsksq; |
122 | struct mlx5e_rq *xskrq = &c->xskrq; | |
feb2ff9d | 123 | struct mlx5e_rq *rq = &c->rq; |
db05815b MM |
124 | bool xsk_open = test_bit(MLX5E_CHANNEL_STATE_XSK, c->state); |
125 | bool aff_change = false; | |
126 | bool busy_xsk = false; | |
e586b3b0 | 127 | bool busy = false; |
2a8d6065 | 128 | int work_done = 0; |
e586b3b0 AV |
129 | int i; |
130 | ||
2d7103c8 TT |
131 | ch_stats->poll++; |
132 | ||
e586b3b0 | 133 | for (i = 0; i < c->num_tc; i++) |
8ec736e5 | 134 | busy |= mlx5e_poll_tx_cq(&c->sq[i].cq, budget); |
e586b3b0 | 135 | |
b9673cf5 | 136 | busy |= mlx5e_poll_xdpsq_cq(&c->xdpsq.cq); |
58b99ee3 | 137 | |
b5503b99 | 138 | if (c->xdp) |
b9673cf5 | 139 | busy |= mlx5e_poll_xdpsq_cq(&c->rq_xdpsq.cq); |
b5503b99 | 140 | |
2a8d6065 | 141 | if (likely(budget)) { /* budget=0 means: don't poll rx rings */ |
db05815b MM |
142 | if (xsk_open) |
143 | work_done = mlx5e_poll_rx_cq(&xskrq->cq, budget); | |
144 | ||
145 | if (likely(budget - work_done)) | |
146 | work_done += mlx5e_poll_rx_cq(&rq->cq, budget - work_done); | |
147 | ||
2a8d6065 SM |
148 | busy |= work_done == budget; |
149 | } | |
39e12351 | 150 | |
ed084fb6 MM |
151 | mlx5e_poll_ico_cq(&c->icosq.cq); |
152 | ||
2c8f80b3 TT |
153 | busy |= INDIRECT_CALL_2(rq->post_wqes, |
154 | mlx5e_post_rx_mpwqes, | |
155 | mlx5e_post_rx_wqes, | |
156 | rq); | |
db05815b | 157 | if (xsk_open) { |
e7e0004a MM |
158 | if (mlx5e_poll_ico_cq(&c->xskicosq.cq)) |
159 | /* Don't clear the flag if nothing was polled to prevent | |
160 | * queueing more WQEs and overflowing XSKICOSQ. | |
161 | */ | |
162 | clear_bit(MLX5E_SQ_STATE_PENDING_XSK_TX, &c->xskicosq.state); | |
db05815b | 163 | busy |= mlx5e_poll_xdpsq_cq(&xsksq->cq); |
871aa189 | 164 | busy_xsk |= mlx5e_napi_xsk_post(xsksq, xskrq); |
db05815b MM |
165 | } |
166 | ||
167 | busy |= busy_xsk; | |
e586b3b0 | 168 | |
a8c2eb15 TT |
169 | if (busy) { |
170 | if (likely(mlx5e_channel_no_affinity_change(c))) | |
171 | return budget; | |
2d7103c8 | 172 | ch_stats->aff_change++; |
db05815b | 173 | aff_change = true; |
2a8d6065 | 174 | if (budget && work_done == budget) |
a8c2eb15 TT |
175 | work_done--; |
176 | } | |
e586b3b0 | 177 | |
7b33aaea | 178 | if (unlikely(!napi_complete_done(napi, work_done))) |
44fb6fbb | 179 | return work_done; |
e586b3b0 | 180 | |
2d7103c8 TT |
181 | ch_stats->arm++; |
182 | ||
cbce4f44 TG |
183 | for (i = 0; i < c->num_tc; i++) { |
184 | mlx5e_handle_tx_dim(&c->sq[i]); | |
e586b3b0 | 185 | mlx5e_cq_arm(&c->sq[i].cq); |
8115b750 | 186 | } |
cb3c7fd4 | 187 | |
feb2ff9d | 188 | mlx5e_handle_rx_dim(rq); |
cbce4f44 | 189 | |
feb2ff9d | 190 | mlx5e_cq_arm(&rq->cq); |
d3c9bc27 | 191 | mlx5e_cq_arm(&c->icosq.cq); |
58b99ee3 | 192 | mlx5e_cq_arm(&c->xdpsq.cq); |
e586b3b0 | 193 | |
db05815b MM |
194 | if (xsk_open) { |
195 | mlx5e_handle_rx_dim(xskrq); | |
196 | mlx5e_cq_arm(&c->xskicosq.cq); | |
197 | mlx5e_cq_arm(&xsksq->cq); | |
198 | mlx5e_cq_arm(&xskrq->cq); | |
199 | } | |
200 | ||
201 | if (unlikely(aff_change && busy_xsk)) { | |
202 | mlx5e_trigger_irq(&c->icosq); | |
203 | ch_stats->force_irq++; | |
204 | } | |
205 | ||
44fb6fbb | 206 | return work_done; |
e586b3b0 AV |
207 | } |
208 | ||
4e0e2ea1 | 209 | void mlx5e_completion_event(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe) |
e586b3b0 AV |
210 | { |
211 | struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq); | |
212 | ||
e586b3b0 | 213 | napi_schedule(cq->napi); |
a1bf74dc TT |
214 | cq->event_ctr++; |
215 | cq->channel->stats->events++; | |
e586b3b0 AV |
216 | } |
217 | ||
218 | void mlx5e_cq_error_event(struct mlx5_core_cq *mcq, enum mlx5_event event) | |
219 | { | |
220 | struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq); | |
221 | struct mlx5e_channel *c = cq->channel; | |
a43b25da | 222 | struct net_device *netdev = c->netdev; |
e586b3b0 AV |
223 | |
224 | netdev_err(netdev, "%s: cqn=0x%.6x event=0x%.2x\n", | |
225 | __func__, mcq->cqn, event); | |
226 | } |