projects / deliverable / linux.git / blame
| 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 | ||
| 33 | #include "en.h" | |
| 34 | ||
| 35 | struct mlx5_cqe64 *mlx5e_get_cqe(struct mlx5e_cq *cq) | |
| 36 | { | |
| 37 | struct mlx5_cqwq *wq = &cq->wq; | |
| 38 | u32 ci = mlx5_cqwq_get_ci(wq); | |
| 39 | struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(wq, ci); | |
| 40 | int cqe_ownership_bit = cqe->op_own & MLX5_CQE_OWNER_MASK; | |
| 41 | int sw_ownership_val = mlx5_cqwq_get_wrap_cnt(wq) & 1; | |
| 42 | ||
| 43 | if (cqe_ownership_bit != sw_ownership_val) | |
| 44 | return NULL; | |
| 45 | ||
| 46 | mlx5_cqwq_pop(wq); | |
| 47 | ||
| 48 | /* ensure cqe content is read after cqe ownership bit */ | |
| 49 | rmb(); | |
| 50 | ||
| 51 | return cqe; | |
| 52 | } | |
| 53 | ||
| 54 | int mlx5e_napi_poll(struct napi_struct *napi, int budget) | |
| 55 | { | |
| 56 | struct mlx5e_channel *c = container_of(napi, struct mlx5e_channel, | |
| 57 | napi); | |
| 58 | bool busy = false; | |
| 59 | int i; | |
| 60 | ||
| 61 | clear_bit(MLX5E_CHANNEL_NAPI_SCHED, &c->flags); | |
| 62 | ||
| 63 | for (i = 0; i < c->num_tc; i++) | |
| 64 | busy |= mlx5e_poll_tx_cq(&c->sq[i].cq); | |
| 65 | ||
| 66 | busy |= mlx5e_poll_rx_cq(&c->rq.cq, budget); | |
| 67 | ||
| 68 | busy |= mlx5e_post_rx_wqes(c->rq.cq.sqrq); | |
| 69 | ||
| 70 | if (busy) | |
| 71 | return budget; | |
| 72 | ||
| 73 | napi_complete(napi); | |
| 74 | ||
| 75 | /* avoid losing completion event during/after polling cqs */ | |
| 76 | if (test_bit(MLX5E_CHANNEL_NAPI_SCHED, &c->flags)) { | |
| 77 | napi_schedule(napi); | |
| 78 | return 0; | |
| 79 | } | |
| 80 | ||
| 81 | for (i = 0; i < c->num_tc; i++) | |
| 82 | mlx5e_cq_arm(&c->sq[i].cq); | |
| 83 | mlx5e_cq_arm(&c->rq.cq); | |
| 84 | ||
| 85 | return 0; | |
| 86 | } | |
| 87 | ||
| 88 | void mlx5e_completion_event(struct mlx5_core_cq *mcq) | |
| 89 | { | |
| 90 | struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq); | |
| 91 | ||
| 92 | set_bit(MLX5E_CQ_HAS_CQES, &cq->flags); | |
| 93 | set_bit(MLX5E_CHANNEL_NAPI_SCHED, &cq->channel->flags); | |
| 94 | barrier(); | |
| 95 | napi_schedule(cq->napi); | |
| 96 | } | |
| 97 | ||
| 98 | void mlx5e_cq_error_event(struct mlx5_core_cq *mcq, enum mlx5_event event) | |
| 99 | { | |
| 100 | struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq); | |
| 101 | struct mlx5e_channel *c = cq->channel; | |
| 102 | struct mlx5e_priv *priv = c->priv; | |
| 103 | struct net_device *netdev = priv->netdev; | |
| 104 | ||
| 105 | netdev_err(netdev, "%s: cqn=0x%.6x event=0x%.2x\n", | |
| 106 | __func__, mcq->cqn, event); | |
| 107 | } |