Add timer to watch the RQ when we are out of mbufs.
The firmware/hardware does not generate additional completion events unless we post new buffers. Use a timer to try to post more buffers in case we are temporarily out of mbufs. Else the receive schedule completely stops. Sponsored by: Mellanox Technologies MFC after: 1 week
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c1bc87b161
commit
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=308416
@ -478,6 +478,7 @@ struct mlx5e_rq {
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struct mlx5_wq_ctrl wq_ctrl;
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u32 rqn;
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struct mlx5e_channel *channel;
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struct callout watchdog;
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} __aligned(MLX5E_CACHELINE_SIZE);
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struct mlx5e_sq_mbuf {
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@ -855,7 +855,13 @@ mlx5e_open_rq(struct mlx5e_channel *c,
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static void
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mlx5e_close_rq(struct mlx5e_rq *rq)
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{
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mtx_lock(&rq->mtx);
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rq->enabled = 0;
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callout_stop(&rq->watchdog);
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mtx_unlock(&rq->mtx);
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callout_drain(&rq->watchdog);
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mlx5e_modify_rq(rq, MLX5_RQC_STATE_RDY, MLX5_RQC_STATE_ERR);
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}
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@ -1439,6 +1445,8 @@ mlx5e_chan_mtx_init(struct mlx5e_channel *c)
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mtx_init(&c->rq.mtx, "mlx5rx", MTX_NETWORK_LOCK, MTX_DEF);
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callout_init_mtx(&c->rq.watchdog, &c->rq.mtx, 0);
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for (tc = 0; tc < c->num_tc; tc++) {
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struct mlx5e_sq *sq = c->sq + tc;
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@ -82,9 +82,10 @@ mlx5e_post_rx_wqes(struct mlx5e_rq *rq)
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while (!mlx5_wq_ll_is_full(&rq->wq)) {
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struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(&rq->wq, rq->wq.head);
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if (unlikely(mlx5e_alloc_rx_wqe(rq, wqe, rq->wq.head)))
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if (unlikely(mlx5e_alloc_rx_wqe(rq, wqe, rq->wq.head))) {
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callout_reset_curcpu(&rq->watchdog, 1, (void *)&mlx5e_post_rx_wqes, rq);
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break;
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}
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mlx5_wq_ll_push(&rq->wq, be16_to_cpu(wqe->next.next_wqe_index));
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}
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