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/*
* Copyright (c) 2015, Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "en.h"
static inline void mlx5e_poll_ico_single_cqe(struct mlx5e_cq *cq,
struct mlx5e_icosq *sq,
struct mlx5_cqe64 *cqe,
u16 *sqcc)
{
struct mlx5_wq_cyc *wq = &sq->wq;
u16 ci = be16_to_cpu(cqe->wqe_counter) & wq->sz_m1;
struct mlx5e_sq_wqe_info *icowi = &sq->db.ico_wqe[ci];
struct mlx5e_rq *rq = &sq->channel->rq;
prefetch(rq);
mlx5_cqwq_pop(&cq->wq);
*sqcc += icowi->num_wqebbs;
if (unlikely((cqe->op_own >> 4) != MLX5_CQE_REQ)) {
WARN_ONCE(true, "mlx5e: Bad OP in ICOSQ CQE: 0x%x\n",
cqe->op_own);
return;
}
if (likely(icowi->opcode == MLX5_OPCODE_UMR)) {
mlx5e_post_rx_mpwqe(rq);
return;
}
if (unlikely(icowi->opcode != MLX5_OPCODE_NOP))
WARN_ONCE(true,
"mlx5e: Bad OPCODE in ICOSQ WQE info: 0x%x\n",
icowi->opcode);
}
static void mlx5e_poll_ico_cq(struct mlx5e_cq *cq)
{
struct mlx5e_icosq *sq = container_of(cq, struct mlx5e_icosq, cq);
struct mlx5_cqe64 *cqe;
u16 sqcc;
if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
return;
cqe = mlx5_cqwq_get_cqe(&cq->wq);
if (likely(!cqe))
return;
/* sq->cc must be updated only after mlx5_cqwq_update_db_record(),
* otherwise a cq overrun may occur
*/
sqcc = sq->cc;
/* by design, there's only a single cqe */
mlx5e_poll_ico_single_cqe(cq, sq, cqe, &sqcc);
mlx5_cqwq_update_db_record(&cq->wq);
/* ensure cq space is freed before enabling more cqes */
wmb();
sq->cc = sqcc;
}
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, budget);
if (c->xdp)
busy |= mlx5e_poll_xdpsq_cq(&c->rq.xdpsq.cq);
work_done = mlx5e_poll_rx_cq(&c->rq.cq, budget);
busy |= work_done == budget;
mlx5e_poll_ico_cq(&c->icosq.cq);
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);
if (test_bit(MLX5E_RQ_STATE_AM, &c->rq.state))
mlx5e_rx_am(&c->rq);
mlx5e_cq_arm(&c->rq.cq);
mlx5e_cq_arm(&c->icosq.cq);
return work_done;
}
void mlx5e_completion_event(struct mlx5_core_cq *mcq)
{
struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq);
cq->event_ctr++;
set_bit(MLX5E_CHANNEL_NAPI_SCHED, &cq->channel->flags);
napi_schedule(cq->napi);
}
void mlx5e_cq_error_event(struct mlx5_core_cq *mcq, enum mlx5_event event)
{
struct mlx5e_cq *cq = container_of(mcq, struct mlx5e_cq, mcq);
struct mlx5e_channel *c = cq->channel;
struct net_device *netdev = c->netdev;
netdev_err(netdev, "%s: cqn=0x%.6x event=0x%.2x\n",
__func__, mcq->cqn, event);
}
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