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 <linux/irq.h>
34 #include "en.h"
35 #include "en/xdp.h"
36
mlx5e_channel_no_affinity_change(struct mlx5e_channel * c)37 static inline bool mlx5e_channel_no_affinity_change(struct mlx5e_channel *c)
38 {
39 int current_cpu = smp_processor_id();
40 const struct cpumask *aff;
41 struct irq_data *idata;
42
43 idata = irq_desc_get_irq_data(c->irq_desc);
44 aff = irq_data_get_affinity_mask(idata);
45 return cpumask_test_cpu(current_cpu, aff);
46 }
47
mlx5e_handle_tx_dim(struct mlx5e_txqsq * sq)48 static void mlx5e_handle_tx_dim(struct mlx5e_txqsq *sq)
49 {
50 struct mlx5e_sq_stats *stats = sq->stats;
51 struct net_dim_sample dim_sample;
52
53 if (unlikely(!test_bit(MLX5E_SQ_STATE_AM, &sq->state)))
54 return;
55
56 net_dim_sample(sq->cq.event_ctr, stats->packets, stats->bytes,
57 &dim_sample);
58 net_dim(&sq->dim, dim_sample);
59 }
60
mlx5e_handle_rx_dim(struct mlx5e_rq * rq)61 static void mlx5e_handle_rx_dim(struct mlx5e_rq *rq)
62 {
63 struct mlx5e_rq_stats *stats = rq->stats;
64 struct net_dim_sample dim_sample;
65
66 if (unlikely(!test_bit(MLX5E_RQ_STATE_AM, &rq->state)))
67 return;
68
69 net_dim_sample(rq->cq.event_ctr, stats->packets, stats->bytes,
70 &dim_sample);
71 net_dim(&rq->dim, dim_sample);
72 }
73
mlx5e_napi_poll(struct napi_struct * napi,int budget)74 int mlx5e_napi_poll(struct napi_struct *napi, int budget)
75 {
76 struct mlx5e_channel *c = container_of(napi, struct mlx5e_channel,
77 napi);
78 struct mlx5e_ch_stats *ch_stats = c->stats;
79 bool busy = false;
80 int work_done = 0;
81 int i;
82
83 ch_stats->poll++;
84
85 for (i = 0; i < c->num_tc; i++)
86 busy |= mlx5e_poll_tx_cq(&c->sq[i].cq, budget);
87
88 busy |= mlx5e_poll_xdpsq_cq(&c->xdpsq.cq);
89
90 if (c->xdp)
91 busy |= mlx5e_poll_xdpsq_cq(&c->rq.xdpsq.cq);
92
93 if (likely(budget)) { /* budget=0 means: don't poll rx rings */
94 work_done = mlx5e_poll_rx_cq(&c->rq.cq, budget);
95 busy |= work_done == budget;
96 }
97
98 busy |= c->rq.post_wqes(&c->rq);
99
100 if (busy) {
101 if (likely(mlx5e_channel_no_affinity_change(c)))
102 return budget;
103 ch_stats->aff_change++;
104 if (budget && work_done == budget)
105 work_done--;
106 }
107
108 if (unlikely(!napi_complete_done(napi, work_done)))
109 return work_done;
110
111 ch_stats->arm++;
112
113 for (i = 0; i < c->num_tc; i++) {
114 mlx5e_handle_tx_dim(&c->sq[i]);
115 mlx5e_cq_arm(&c->sq[i].cq);
116 }
117
118 mlx5e_handle_rx_dim(&c->rq);
119
120 mlx5e_cq_arm(&c->rq.cq);
121 mlx5e_cq_arm(&c->icosq.cq);
122 mlx5e_cq_arm(&c->xdpsq.cq);
123
124 return work_done;
125 }
126
mlx5e_completion_event(struct mlx5_core_cq * mcq)127 void mlx5e_completion_event(struct mlx5_core_cq *mcq)
128 {
129 struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq);
130
131 napi_schedule(cq->napi);
132 cq->event_ctr++;
133 cq->channel->stats->events++;
134 }
135
mlx5e_cq_error_event(struct mlx5_core_cq * mcq,enum mlx5_event event)136 void mlx5e_cq_error_event(struct mlx5_core_cq *mcq, enum mlx5_event event)
137 {
138 struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq);
139 struct mlx5e_channel *c = cq->channel;
140 struct net_device *netdev = c->netdev;
141
142 netdev_err(netdev, "%s: cqn=0x%.6x event=0x%.2x\n",
143 __func__, mcq->cqn, event);
144 }
145
