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net/mlx5e: Reset RQ doorbell counter before moving RQ state from RST to RDY 

commit 5ee090ed0d upstream.

Initialize RQ doorbell counters to zero prior to moving an RQ from RST
to RDY state. Per HW spec, when RQ is back to RDY state, the descriptor
ID on the completion is reset. The doorbell record must comply.

Fixes: 8276ea1353 ("net/mlx5e: Report and recover from CQE with error on RQ")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reported-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Aya Levin 2019-12-09 14:08:18 +02:00 committed by Greg Kroah-Hartman
parent 773dfd2223
commit 06320052ee
4 changed files with 43 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
View File

@ -179,6 +179,14 @@ mlx5e_tx_dma_unmap(struct device *pdev, struct mlx5e_sq_dma *dma)
}
}
static inline void mlx5e_rqwq_reset(struct mlx5e_rq *rq)
{
if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ)
mlx5_wq_ll_reset(&rq->mpwqe.wq);
else
mlx5_wq_cyc_reset(&rq->wqe.wq);
}
/* SW parser related functions */
struct mlx5e_swp_spec {

3
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -723,6 +723,9 @@ int mlx5e_modify_rq_state(struct mlx5e_rq *rq, int curr_state, int next_state)
if (!in)
return -ENOMEM;
if (curr_state == MLX5_RQC_STATE_RST && next_state == MLX5_RQC_STATE_RDY)
mlx5e_rqwq_reset(rq);
rqc = MLX5_ADDR_OF(modify_rq_in, in, ctx);
MLX5_SET(modify_rq_in, in, rq_state, curr_state);

39
drivers/net/ethernet/mellanox/mlx5/core/wq.c
View File

@ -96,6 +96,13 @@ err_db_free:
return err;
}
void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq)
{
wq->wqe_ctr = 0;
wq->cur_sz = 0;
mlx5_wq_cyc_update_db_record(wq);
}
int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *qpc, struct mlx5_wq_qp *wq,
struct mlx5_wq_ctrl *wq_ctrl)
@ -194,6 +201,19 @@ err_db_free:
return err;
}
static void mlx5_wq_ll_init_list(struct mlx5_wq_ll *wq)
{
struct mlx5_wqe_srq_next_seg *next_seg;
int i;
for (i = 0; i < wq->fbc.sz_m1; i++) {
next_seg = mlx5_wq_ll_get_wqe(wq, i);
next_seg->next_wqe_index = cpu_to_be16(i + 1);
}
next_seg = mlx5_wq_ll_get_wqe(wq, i);
wq->tail_next = &next_seg->next_wqe_index;
}
int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *wqc, struct mlx5_wq_ll *wq,
struct mlx5_wq_ctrl *wq_ctrl)
@ -201,9 +221,7 @@ int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride);
u8 log_wq_sz = MLX5_GET(wq, wqc, log_wq_sz);
struct mlx5_frag_buf_ctrl *fbc = &wq->fbc;
struct mlx5_wqe_srq_next_seg *next_seg;
int err;
int i;
err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
if (err) {
@ -222,13 +240,7 @@ int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc);
for (i = 0; i < fbc->sz_m1; i++) {
next_seg = mlx5_wq_ll_get_wqe(wq, i);
next_seg->next_wqe_index = cpu_to_be16(i + 1);
}
next_seg = mlx5_wq_ll_get_wqe(wq, i);
wq->tail_next = &next_seg->next_wqe_index;
mlx5_wq_ll_init_list(wq);
wq_ctrl->mdev = mdev;
return 0;
@ -239,6 +251,15 @@ err_db_free:
return err;
}
void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq)
{
wq->head = 0;
wq->wqe_ctr = 0;
wq->cur_sz = 0;
mlx5_wq_ll_init_list(wq);
mlx5_wq_ll_update_db_record(wq);
}
void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
{
mlx5_frag_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);

2
drivers/net/ethernet/mellanox/mlx5/core/wq.h
View File

@ -80,10 +80,12 @@ int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *wqc, struct mlx5_wq_cyc *wq,
struct mlx5_wq_ctrl *wq_ctrl);
u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq);
int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *qpc, struct mlx5_wq_qp *wq,
struct mlx5_wq_ctrl *wq_ctrl);
void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq);
int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *cqc, struct mlx5_cqwq *wq,