int mlx5e_napi_poll(struct napi_struct *napi, int budget)
{
struct mlx5e_channel *c = container_of(napi, struct mlx5e_channel,
napi);
bool busy = false;
int work_done;
int i;
clear_bit(MLX5E_CHANNEL_NAPI_SCHED, &c->flags);
for (i = 0; i < c->num_tc; i++)
busy |= mlx5e_poll_tx_cq(&c->sq[i].cq);
work_done = mlx5e_poll_rx_cq(&c->rq.cq, budget);
busy |= work_done == budget;
busy |= mlx5e_post_rx_wqes(&c->rq);
if (busy)
return budget;
napi_complete_done(napi, work_done);
/* avoid losing completion event during/after polling cqs */
if (test_bit(MLX5E_CHANNEL_NAPI_SCHED, &c->flags)) {
napi_schedule(napi);
return work_done;
}
for (i = 0; i < c->num_tc; i++)
mlx5e_cq_arm(&c->sq[i].cq);
mlx5e_cq_arm(&c->rq.cq);
return work_done;
}
int mlx5e_napi_poll(struct napi_struct *napi, int budget)
{
struct mlx5e_channel *c = container_of(napi, struct mlx5e_channel,
napi);
struct mlx5e_ch_stats *ch_stats = c->stats;
struct mlx5e_rq *rq = &c->rq;
bool busy = false;
int work_done = 0;
int i;
ch_stats->poll++;
for (i = 0; i < c->num_tc; i++)
busy |= mlx5e_poll_tx_cq(&c->sq[i].cq, budget);
busy |= mlx5e_poll_xdpsq_cq(&c->xdpsq.cq, NULL);
if (c->xdp)
busy |= mlx5e_poll_xdpsq_cq(&rq->xdpsq.cq, rq);
if (likely(budget)) { /* budget=0 means: don't poll rx rings */
work_done = mlx5e_poll_rx_cq(&rq->cq, budget);
busy |= work_done == budget;
}
busy |= c->rq.post_wqes(rq);
if (busy) {
if (likely(mlx5e_channel_no_affinity_change(c)))
return budget;
ch_stats->aff_change++;
if (budget && work_done == budget)
work_done--;
}
if (unlikely(!napi_complete_done(napi, work_done)))
return work_done;
ch_stats->arm++;
for (i = 0; i < c->num_tc; i++) {
mlx5e_handle_tx_dim(&c->sq[i]);
mlx5e_cq_arm(&c->sq[i].cq);
}
mlx5e_handle_rx_dim(rq);
mlx5e_cq_arm(&rq->cq);
mlx5e_cq_arm(&c->icosq.cq);
mlx5e_cq_arm(&c->xdpsq.cq);
return work_done;
}
static int mlx5e_enable_cq(struct mlx5e_cq *cq, struct mlx5e_cq_param *param)
{
struct mlx5e_channel *c = cq->channel;
struct mlx5e_priv *priv = c->priv;
struct mlx5_core_dev *mdev = priv->mdev;
struct mlx5_core_cq *mcq = &cq->mcq;
void *in;
void *cqc;
int inlen;
int irqn_not_used;
int eqn;
int err;
inlen = MLX5_ST_SZ_BYTES(create_cq_in) +
sizeof(u64) * cq->wq_ctrl.buf.npages;
in = mlx5_vzalloc(inlen);
if (!in)
return -ENOMEM;
cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context);
memcpy(cqc, param->cqc, sizeof(param->cqc));
mlx5_fill_page_array(&cq->wq_ctrl.buf,
(__be64 *)MLX5_ADDR_OF(create_cq_in, in, pas));
mlx5_vector2eqn(mdev, param->eq_ix, &eqn, &irqn_not_used);
MLX5_SET(cqc, cqc, c_eqn, eqn);
MLX5_SET(cqc, cqc, uar_page, mcq->uar->index);
MLX5_SET(cqc, cqc, log_page_size, cq->wq_ctrl.buf.page_shift -
PAGE_SHIFT);
MLX5_SET64(cqc, cqc, dbr_addr, cq->wq_ctrl.db.dma);
err = mlx5_core_create_cq(mdev, mcq, in, inlen);
kvfree(in);
if (err)
return err;
mlx5e_cq_arm(cq);
return 0;
}
