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net/mlx5e: RX, Use cyclic WQ in legacy RQ

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Now that LRO is not supported for Legacy RQ, there is no source of
out-of-order completions in the WQ, and we can use a cyclic one.
This has multiple advantages:
- reduces the WQE size (smaller PCI transactions).
- lower overhead in datapath (no handling of 'next' pointers).
- no reserved WQE for the WQ head (was need in linked-list).
- allows using a constant map between frag and dma_info struct, in downstream patch.

Performance tests:
ConnectX-4, single core, single RX ring.
Major gain in packet rate of single ring XDP drop.
Bottleneck is shifted form HW (at 16Mpps) to SW (at 20Mpps).

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Tariq Toukan 2018-04-02 17:31:31 +03:00 committed by Saeed Mahameed
parent 422d4c401e
commit 99cbfa93a6
6 changed files with 161 additions and 111 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/net/ethernet/mellanox/mlx5/core/en.h
View File

@ -186,9 +186,13 @@ struct mlx5e_tx_wqe {
struct mlx5_wqe_data_seg data[0];
};
struct mlx5e_rx_wqe {
struct mlx5e_rx_wqe_ll {
struct mlx5_wqe_srq_next_seg next;
struct mlx5_wqe_data_seg data;
struct mlx5_wqe_data_seg data[0];
};
struct mlx5e_rx_wqe_cyc {
struct mlx5_wqe_data_seg data[0];
};
struct mlx5e_umr_wqe {
@ -500,7 +504,7 @@ struct mlx5e_rq {
/* data path */
union {
struct {
struct mlx5_wq_ll wq;
struct mlx5_wq_cyc wq;
struct mlx5e_wqe_frag_info *frag_info;
u32 frag_sz; /* max possible skb frag_sz */
union {

89
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -166,7 +166,7 @@ static u16 mlx5e_get_rq_headroom(struct mlx5_core_dev *mdev,
linear_rq_headroom += NET_IP_ALIGN;
if (params->rq_wq_type == MLX5_WQ_TYPE_LINKED_LIST)
if (params->rq_wq_type == MLX5_WQ_TYPE_CYCLIC)
return linear_rq_headroom;
if (mlx5e_rx_mpwqe_is_linear_skb(mdev, params))
@ -205,7 +205,7 @@ void mlx5e_set_rq_type(struct mlx5_core_dev *mdev, struct mlx5e_params *params)
params->rq_wq_type = mlx5e_striding_rq_possible(mdev, params) &&
MLX5E_GET_PFLAG(params, MLX5E_PFLAG_RX_STRIDING_RQ) ?
MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ :
MLX5_WQ_TYPE_LINKED_LIST;
MLX5_WQ_TYPE_CYCLIC;
}
static void mlx5e_update_carrier(struct mlx5e_priv *priv)
@ -325,7 +325,7 @@ static u32 mlx5e_rqwq_get_size(struct mlx5e_rq *rq)
case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
return mlx5_wq_ll_get_size(&rq->mpwqe.wq);
default:
return mlx5_wq_ll_get_size(&rq->wqe.wq);
return mlx5_wq_cyc_get_size(&rq->wqe.wq);
}
}
@ -491,15 +491,15 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c,
if (err)
goto err_destroy_umr_mkey;
break;
default: /* MLX5_WQ_TYPE_LINKED_LIST */
err = mlx5_wq_ll_create(mdev, &rqp->wq, rqc_wq, &rq->wqe.wq,
&rq->wq_ctrl);
default: /* MLX5_WQ_TYPE_CYCLIC */
err = mlx5_wq_cyc_create(mdev, &rqp->wq, rqc_wq, &rq->wqe.wq,
&rq->wq_ctrl);
if (err)
return err;
rq->wqe.wq.db = &rq->wqe.wq.db[MLX5_RCV_DBR];
wq_sz = mlx5_wq_ll_get_size(&rq->wqe.wq);
wq_sz = mlx5_wq_cyc_get_size(&rq->wqe.wq);
rq->wqe.frag_info =
kzalloc_node(wq_sz * sizeof(*rq->wqe.frag_info),
@ -568,19 +568,19 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c,
for (i = 0; i < wq_sz; i++) {
if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ) {
struct mlx5e_rx_wqe *wqe =
struct mlx5e_rx_wqe_ll *wqe =
mlx5_wq_ll_get_wqe(&rq->mpwqe.wq, i);
u64 dma_offset = mlx5e_get_mpwqe_offset(rq, i);
wqe->data.addr = cpu_to_be64(dma_offset + rq->buff.headroom);
wqe->data.byte_count = cpu_to_be32(byte_count);
wqe->data.lkey = rq->mkey_be;
wqe->data[0].addr = cpu_to_be64(dma_offset + rq->buff.headroom);
wqe->data[0].byte_count = cpu_to_be32(byte_count);
wqe->data[0].lkey = rq->mkey_be;
} else {
struct mlx5e_rx_wqe *wqe =
mlx5_wq_ll_get_wqe(&rq->wqe.wq, i);
struct mlx5e_rx_wqe_cyc *wqe =
mlx5_wq_cyc_get_wqe(&rq->wqe.wq, i);
wqe->data.byte_count = cpu_to_be32(byte_count);
wqe->data.lkey = rq->mkey_be;
wqe->data[0].byte_count = cpu_to_be32(byte_count);
wqe->data[0].lkey = rq->mkey_be;
}
}
@ -630,7 +630,7 @@ static void mlx5e_free_rq(struct mlx5e_rq *rq)
kfree(rq->mpwqe.info);
mlx5_core_destroy_mkey(rq->mdev, &rq->umr_mkey);
break;
default: /* MLX5_WQ_TYPE_LINKED_LIST */
default: /* MLX5_WQ_TYPE_CYCLIC */
kfree(rq->wqe.frag_info);
}
@ -801,11 +801,12 @@ static void mlx5e_free_rx_descs(struct mlx5e_rq *rq)
if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ) {
struct mlx5_wq_ll *wq = &rq->mpwqe.wq;
/* UMR WQE (if in progress) is always at wq->head */
if (rq->mpwqe.umr_in_progress)
mlx5e_free_rx_mpwqe(rq, &rq->mpwqe.info[wq->head]);
while (!mlx5_wq_ll_is_empty(wq)) {
struct mlx5e_rx_wqe *wqe;
struct mlx5e_rx_wqe_ll *wqe;
wqe_ix_be = *wq->tail_next;
wqe_ix = be16_to_cpu(wqe_ix_be);
@ -815,24 +816,19 @@ static void mlx5e_free_rx_descs(struct mlx5e_rq *rq)
&wqe->next.next_wqe_index);
}
} else {
struct mlx5_wq_ll *wq = &rq->wqe.wq;
struct mlx5_wq_cyc *wq = &rq->wqe.wq;
while (!mlx5_wq_ll_is_empty(wq)) {
struct mlx5e_rx_wqe *wqe;
wqe_ix_be = *wq->tail_next;
wqe_ix = be16_to_cpu(wqe_ix_be);
wqe = mlx5_wq_ll_get_wqe(wq, wqe_ix);
while (!mlx5_wq_cyc_is_empty(wq)) {
wqe_ix = mlx5_wq_cyc_get_tail(wq);
rq->dealloc_wqe(rq, wqe_ix);
mlx5_wq_ll_pop(wq, wqe_ix_be,
&wqe->next.next_wqe_index);
mlx5_wq_cyc_pop(wq);
}
/* Clean outstanding pages on handled WQEs that decided to do page-reuse,
* but yet to be re-posted.
*/
if (rq->wqe.page_reuse) {
int wq_sz = mlx5_wq_ll_get_size(wq);
int wq_sz = mlx5_wq_cyc_get_size(wq);
for (wqe_ix = 0; wqe_ix < wq_sz; wqe_ix++)
rq->dealloc_wqe(rq, wqe_ix);
@ -1958,6 +1954,21 @@ static void mlx5e_close_channel(struct mlx5e_channel *c)
kfree(c);
}
static inline u8 mlx5e_get_rqwq_log_stride(u8 wq_type, int ndsegs)
{
int sz = sizeof(struct mlx5_wqe_data_seg) * ndsegs;
switch (wq_type) {
case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
sz += sizeof(struct mlx5e_rx_wqe_ll);
break;
default: /* MLX5_WQ_TYPE_CYCLIC */
sz += sizeof(struct mlx5e_rx_wqe_cyc);
}
return order_base_2(sz);
}
static void mlx5e_build_rq_param(struct mlx5e_priv *priv,
struct mlx5e_params *params,
struct mlx5e_rq_param *param)
@ -1965,6 +1976,7 @@ static void mlx5e_build_rq_param(struct mlx5e_priv *priv,
struct mlx5_core_dev *mdev = priv->mdev;
void *rqc = param->rqc;
void *wq = MLX5_ADDR_OF(rqc, rqc, wq);
int ndsegs = 1;
switch (params->rq_wq_type) {
case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
@ -1974,16 +1986,16 @@ static void mlx5e_build_rq_param(struct mlx5e_priv *priv,
MLX5_SET(wq, wq, log_wqe_stride_size,
mlx5e_mpwqe_get_log_stride_size(mdev, params) -
MLX5_MPWQE_LOG_STRIDE_SZ_BASE);
MLX5_SET(wq, wq, wq_type, MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ);
MLX5_SET(wq, wq, log_wq_sz, mlx5e_mpwqe_get_log_rq_size(params));
break;
default: /* MLX5_WQ_TYPE_LINKED_LIST */
MLX5_SET(wq, wq, wq_type, MLX5_WQ_TYPE_LINKED_LIST);
default: /* MLX5_WQ_TYPE_CYCLIC */
MLX5_SET(wq, wq, log_wq_sz, params->log_rq_mtu_frames);
}
MLX5_SET(wq, wq, wq_type, params->rq_wq_type);
MLX5_SET(wq, wq, end_padding_mode, MLX5_WQ_END_PAD_MODE_ALIGN);
MLX5_SET(wq, wq, log_wq_stride, ilog2(sizeof(struct mlx5e_rx_wqe)));
MLX5_SET(wq, wq, log_wq_stride,
mlx5e_get_rqwq_log_stride(params->rq_wq_type, ndsegs));
MLX5_SET(wq, wq, pd, mdev->mlx5e_res.pdn);
MLX5_SET(rqc, rqc, counter_set_id, priv->q_counter);
MLX5_SET(rqc, rqc, vsd, params->vlan_strip_disable);
@ -1999,8 +2011,9 @@ static void mlx5e_build_drop_rq_param(struct mlx5e_priv *priv,
void *rqc = param->rqc;
void *wq = MLX5_ADDR_OF(rqc, rqc, wq);
MLX5_SET(wq, wq, wq_type, MLX5_WQ_TYPE_LINKED_LIST);
MLX5_SET(wq, wq, log_wq_stride, ilog2(sizeof(struct mlx5e_rx_wqe)));
MLX5_SET(wq, wq, wq_type, MLX5_WQ_TYPE_CYCLIC);
MLX5_SET(wq, wq, log_wq_stride,
mlx5e_get_rqwq_log_stride(MLX5_WQ_TYPE_CYCLIC, 1));
MLX5_SET(rqc, rqc, counter_set_id, priv->drop_rq_q_counter);
param->wq.buf_numa_node = dev_to_node(&mdev->pdev->dev);
@ -2051,7 +2064,7 @@ static void mlx5e_build_rx_cq_param(struct mlx5e_priv *priv,
log_cq_size = mlx5e_mpwqe_get_log_rq_size(params) +
mlx5e_mpwqe_get_log_num_strides(mdev, params);
break;
default: /* MLX5_WQ_TYPE_LINKED_LIST */
default: /* MLX5_WQ_TYPE_CYCLIC */
log_cq_size = params->log_rq_mtu_frames;
}
@ -2857,8 +2870,8 @@ static int mlx5e_alloc_drop_rq(struct mlx5_core_dev *mdev,
param->wq.db_numa_node = param->wq.buf_numa_node;
err = mlx5_wq_ll_create(mdev, &param->wq, rqc_wq, &rq->wqe.wq,
&rq->wq_ctrl);
err = mlx5_wq_cyc_create(mdev, &param->wq, rqc_wq, &rq->wqe.wq,
&rq->wq_ctrl);
if (err)
return err;
@ -3360,7 +3373,7 @@ static int set_feature_lro(struct net_device *netdev, bool enable)
new_channels.params = *old_params;
new_channels.params.lro_en = enable;
if (old_params->rq_wq_type != MLX5_WQ_TYPE_LINKED_LIST) {
if (old_params->rq_wq_type != MLX5_WQ_TYPE_CYCLIC) {
if (mlx5e_rx_mpwqe_is_linear_skb(mdev, old_params) ==
mlx5e_rx_mpwqe_is_linear_skb(mdev, &new_channels.params))
reset = false;
@ -3566,7 +3579,7 @@ int mlx5e_change_mtu(struct net_device *netdev, int new_mtu,
new_channels.params = *params;
new_channels.params.sw_mtu = new_mtu;
if (params->rq_wq_type != MLX5_WQ_TYPE_LINKED_LIST) {
if (params->rq_wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ) {
u8 ppw_old = mlx5e_mpwqe_log_pkts_per_wqe(params);
u8 ppw_new = mlx5e_mpwqe_log_pkts_per_wqe(&new_channels.params);

2
drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
View File

@ -927,7 +927,7 @@ static void mlx5e_build_rep_params(struct mlx5_core_dev *mdev,
params->hard_mtu = MLX5E_ETH_HARD_MTU;
params->sw_mtu = mtu;
params->log_sq_size = MLX5E_REP_PARAMS_LOG_SQ_SIZE;
params->rq_wq_type = MLX5_WQ_TYPE_LINKED_LIST;
params->rq_wq_type = MLX5_WQ_TYPE_CYCLIC;
params->log_rq_mtu_frames = MLX5E_REP_PARAMS_LOG_RQ_SIZE;
params->rx_dim_enabled = MLX5_CAP_GEN(mdev, cq_moderation);

115
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
View File

@ -113,7 +113,7 @@ static inline void mlx5e_decompress_cqe(struct mlx5e_rq *rq,
mpwrq_get_cqe_consumed_strides(&cq->title);
else
cq->decmprs_wqe_counter =
mlx5_wq_ll_ctr2ix(&rq->wqe.wq, cq->decmprs_wqe_counter + 1);
mlx5_wq_cyc_ctr2ix(&rq->wqe.wq, cq->decmprs_wqe_counter + 1);
}
static inline void mlx5e_decompress_cqe_no_hash(struct mlx5e_rq *rq,
@ -270,7 +270,12 @@ static inline bool mlx5e_page_reuse(struct mlx5e_rq *rq,
!mlx5e_page_is_reserved(wi->di.page);
}
static int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16 ix)
static inline struct mlx5e_wqe_frag_info *get_frag(struct mlx5e_rq *rq, u16 ix)
{
return &rq->wqe.frag_info[ix];
}
static int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe_cyc *wqe, u16 ix)
{
struct mlx5e_wqe_frag_info *wi = &rq->wqe.frag_info[ix];
@ -281,7 +286,7 @@ static int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16
wi->offset = 0;
}
wqe->data.addr = cpu_to_be64(wi->di.addr + wi->offset + rq->buff.headroom);
wqe->data[0].addr = cpu_to_be64(wi->di.addr + wi->offset + rq->buff.headroom);
return 0;
}
@ -370,7 +375,7 @@ void mlx5e_free_rx_mpwqe(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi)
static void mlx5e_post_rx_mpwqe(struct mlx5e_rq *rq)
{
struct mlx5_wq_ll *wq = &rq->mpwqe.wq;
struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(wq, wq->head);
struct mlx5e_rx_wqe_ll *wqe = mlx5_wq_ll_get_wqe(wq, wq->head);
rq->mpwqe.umr_in_progress = false;
@ -470,31 +475,32 @@ void mlx5e_dealloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq)
{
struct mlx5_wq_ll *wq = &rq->wqe.wq;
struct mlx5_wq_cyc *wq = &rq->wqe.wq;
int err;
if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state)))
return false;
if (mlx5_wq_ll_is_full(wq))
if (mlx5_wq_cyc_is_full(wq))
return false;
do {
struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(wq, wq->head);
u16 head = mlx5_wq_cyc_get_head(wq);
struct mlx5e_rx_wqe_cyc *wqe = mlx5_wq_cyc_get_wqe(wq, head);
err = mlx5e_alloc_rx_wqe(rq, wqe, wq->head);
err = mlx5e_alloc_rx_wqe(rq, wqe, head);
if (unlikely(err)) {
rq->stats->buff_alloc_err++;
break;
}
mlx5_wq_ll_push(wq, be16_to_cpu(wqe->next.next_wqe_index));
} while (!mlx5_wq_ll_is_full(wq));
mlx5_wq_cyc_push(wq);
} while (!mlx5_wq_cyc_is_full(wq));
/* ensure wqes are visible to device before updating doorbell record */
dma_wmb();
mlx5_wq_ll_update_db_record(wq);
mlx5_wq_cyc_update_db_record(wq);
return !!err;
}
@ -987,19 +993,15 @@ struct sk_buff *skb_from_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
void mlx5e_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
struct mlx5_wq_ll *wq = &rq->wqe.wq;
struct mlx5_wq_cyc *wq = &rq->wqe.wq;
struct mlx5e_wqe_frag_info *wi;
struct mlx5e_rx_wqe *wqe;
__be16 wqe_counter_be;
struct sk_buff *skb;
u16 wqe_counter;
u32 cqe_bcnt;
u16 ci;
wqe_counter_be = cqe->wqe_counter;
wqe_counter = be16_to_cpu(wqe_counter_be);
wqe = mlx5_wq_ll_get_wqe(wq, wqe_counter);
wi = &rq->wqe.frag_info[wqe_counter];
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
ci = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
wi = get_frag(rq, ci);
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
skb = skb_from_cqe(rq, cqe, wi, cqe_bcnt);
if (!skb) {
@ -1007,20 +1009,19 @@ void mlx5e_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)) {
wi->di.page = NULL;
/* do not return page to cache, it will be returned on XDP_TX completion */
goto wq_ll_pop;
goto wq_cyc_pop;
}
/* probably an XDP_DROP, save the page-reuse checks */
mlx5e_free_rx_wqe(rq, wi);
goto wq_ll_pop;
goto wq_cyc_pop;
}
mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
napi_gro_receive(rq->cq.napi, skb);
mlx5e_free_rx_wqe_reuse(rq, wi);
wq_ll_pop:
mlx5_wq_ll_pop(wq, wqe_counter_be,
&wqe->next.next_wqe_index);
wq_cyc_pop:
mlx5_wq_cyc_pop(wq);
}
#ifdef CONFIG_MLX5_ESWITCH
@ -1030,30 +1031,26 @@ void mlx5e_handle_rx_cqe_rep(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
struct mlx5e_priv *priv = netdev_priv(netdev);
struct mlx5e_rep_priv *rpriv = priv->ppriv;
struct mlx5_eswitch_rep *rep = rpriv->rep;
struct mlx5_wq_ll *wq = &rq->wqe.wq;
struct mlx5_wq_cyc *wq = &rq->wqe.wq;
struct mlx5e_wqe_frag_info *wi;
struct mlx5e_rx_wqe *wqe;
struct sk_buff *skb;
__be16 wqe_counter_be;
u16 wqe_counter;
u32 cqe_bcnt;
u16 ci;
wqe_counter_be = cqe->wqe_counter;
wqe_counter = be16_to_cpu(wqe_counter_be);
wqe = mlx5_wq_ll_get_wqe(wq, wqe_counter);
wi = &rq->wqe.frag_info[wqe_counter];
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
ci = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
wi = get_frag(rq, ci);
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
skb = skb_from_cqe(rq, cqe, wi, cqe_bcnt);
if (!skb) {
if (__test_and_clear_bit(MLX5E_RQ_FLAG_XDP_XMIT, rq->flags)) {
wi->di.page = NULL;
/* do not return page to cache, it will be returned on XDP_TX completion */
goto wq_ll_pop;
goto wq_cyc_pop;
}
/* probably an XDP_DROP, save the page-reuse checks */
mlx5e_free_rx_wqe(rq, wi);
goto wq_ll_pop;
goto wq_cyc_pop;
}
mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
@ -1064,9 +1061,8 @@ void mlx5e_handle_rx_cqe_rep(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
napi_gro_receive(rq->cq.napi, skb);
mlx5e_free_rx_wqe_reuse(rq, wi);
wq_ll_pop:
mlx5_wq_ll_pop(wq, wqe_counter_be,
&wqe->next.next_wqe_index);
wq_cyc_pop:
mlx5_wq_cyc_pop(wq);
}
#endif
@ -1165,7 +1161,7 @@ void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
u32 wqe_offset = stride_ix << rq->mpwqe.log_stride_sz;
u32 head_offset = wqe_offset & (PAGE_SIZE - 1);
u32 page_idx = wqe_offset >> PAGE_SHIFT;
struct mlx5e_rx_wqe *wqe;
struct mlx5e_rx_wqe_ll *wqe;
struct mlx5_wq_ll *wq;
struct sk_buff *skb;
u16 cqe_bcnt;
@ -1403,19 +1399,15 @@ static inline void mlx5i_complete_rx_cqe(struct mlx5e_rq *rq,
void mlx5i_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
struct mlx5_wq_ll *wq = &rq->wqe.wq;
struct mlx5_wq_cyc *wq = &rq->wqe.wq;
struct mlx5e_wqe_frag_info *wi;
struct mlx5e_rx_wqe *wqe;
__be16 wqe_counter_be;
struct sk_buff *skb;
u16 wqe_counter;
u32 cqe_bcnt;
u16 ci;
wqe_counter_be = cqe->wqe_counter;
wqe_counter = be16_to_cpu(wqe_counter_be);
wqe = mlx5_wq_ll_get_wqe(wq, wqe_counter);
wi = &rq->wqe.frag_info[wqe_counter];
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
ci = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
wi = get_frag(rq, ci);
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
skb = skb_from_cqe(rq, cqe, wi, cqe_bcnt);
if (!skb)
@ -1430,8 +1422,7 @@ void mlx5i_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
wq_free_wqe:
mlx5e_free_rx_wqe_reuse(rq, wi);
mlx5_wq_ll_pop(wq, wqe_counter_be,
&wqe->next.next_wqe_index);
mlx5_wq_cyc_pop(wq);
}
#endif /* CONFIG_MLX5_CORE_IPOIB */
@ -1440,38 +1431,34 @@ wq_free_wqe:
void mlx5e_ipsec_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
struct mlx5_wq_ll *wq = &rq->wqe.wq;
struct mlx5_wq_cyc *wq = &rq->wqe.wq;
struct mlx5e_wqe_frag_info *wi;
struct mlx5e_rx_wqe *wqe;
__be16 wqe_counter_be;
struct sk_buff *skb;
u16 wqe_counter;
u32 cqe_bcnt;
u16 ci;
wqe_counter_be = cqe->wqe_counter;
wqe_counter = be16_to_cpu(wqe_counter_be);
wqe = mlx5_wq_ll_get_wqe(wq, wqe_counter);
wi = &rq->wqe.frag_info[wqe_counter];
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
ci = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
wi = get_frag(rq, ci);
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
skb = skb_from_cqe(rq, cqe, wi, cqe_bcnt);
if (unlikely(!skb)) {
/* a DROP, save the page-reuse checks */
mlx5e_free_rx_wqe(rq, wi);
goto wq_ll_pop;
goto wq_cyc_pop;
}
skb = mlx5e_ipsec_handle_rx_skb(rq->netdev, skb);
if (unlikely(!skb)) {
mlx5e_free_rx_wqe(rq, wi);
goto wq_ll_pop;
goto wq_cyc_pop;
}
mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
napi_gro_receive(rq->cq.napi, skb);
mlx5e_free_rx_wqe_reuse(rq, wi);
wq_ll_pop:
mlx5_wq_ll_pop(wq, wqe_counter_be, &wqe->next.next_wqe_index);
wq_cyc_pop:
mlx5_wq_cyc_pop(wq);
}
#endif /* CONFIG_MLX5_EN_IPSEC */

1
drivers/net/ethernet/mellanox/mlx5/core/wq.c
View File

@ -85,6 +85,7 @@ int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
mlx5_fill_fbc(MLX5_GET(wq, wqc, log_wq_stride),
MLX5_GET(wq, wqc, log_wq_sz),
fbc);
wq->sz = wq->fbc.sz_m1 + 1;
err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
if (err) {

55
drivers/net/ethernet/mellanox/mlx5/core/wq.h
View File

@ -51,6 +51,9 @@ struct mlx5_wq_ctrl {
struct mlx5_wq_cyc {
struct mlx5_frag_buf_ctrl fbc;
__be32 *db;
u16 sz;
u16 wqe_ctr;
u16 cur_sz;
};
struct mlx5_wq_qp {
@ -95,6 +98,43 @@ u32 mlx5_wq_ll_get_size(struct mlx5_wq_ll *wq);
void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl);
static inline int mlx5_wq_cyc_is_full(struct mlx5_wq_cyc *wq)
{
return wq->cur_sz == wq->sz;
}
static inline int mlx5_wq_cyc_missing(struct mlx5_wq_cyc *wq)
{
return wq->sz - wq->cur_sz;
}
static inline int mlx5_wq_cyc_is_empty(struct mlx5_wq_cyc *wq)
{
return !wq->cur_sz;
}
static inline void mlx5_wq_cyc_push(struct mlx5_wq_cyc *wq)
{
wq->wqe_ctr++;
wq->cur_sz++;
}
static inline void mlx5_wq_cyc_push_n(struct mlx5_wq_cyc *wq, u8 n)
{
wq->wqe_ctr += n;
wq->cur_sz += n;
}
static inline void mlx5_wq_cyc_pop(struct mlx5_wq_cyc *wq)
{
wq->cur_sz--;
}
static inline void mlx5_wq_cyc_update_db_record(struct mlx5_wq_cyc *wq)
{
*wq->db = cpu_to_be32(wq->wqe_ctr);
}
static inline u16 mlx5_wq_cyc_ctr2ix(struct mlx5_wq_cyc *wq, u16 ctr)
{
return ctr & wq->fbc.sz_m1;
@ -105,6 +145,16 @@ static inline u16 mlx5_wq_cyc_ctr2fragix(struct mlx5_wq_cyc *wq, u16 ctr)
return ctr & wq->fbc.frag_sz_m1;
}
static inline u16 mlx5_wq_cyc_get_head(struct mlx5_wq_cyc *wq)
{
return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr);
}
static inline u16 mlx5_wq_cyc_get_tail(struct mlx5_wq_cyc *wq)
{
return mlx5_wq_cyc_ctr2ix(wq, wq->wqe_ctr - wq->cur_sz);
}
static inline void *mlx5_wq_cyc_get_wqe(struct mlx5_wq_cyc *wq, u16 ix)
{
return mlx5_frag_buf_get_wqe(&wq->fbc, ix);
@ -179,11 +229,6 @@ static inline int mlx5_wq_ll_is_empty(struct mlx5_wq_ll *wq)
return !wq->cur_sz;
}
static inline u16 mlx5_wq_ll_ctr2ix(struct mlx5_wq_ll *wq, u16 ctr)
{
return ctr & wq->fbc.sz_m1;
}
static inline void *mlx5_wq_ll_get_wqe(struct mlx5_wq_ll *wq, u16 ix)
{
return mlx5_frag_buf_get_wqe(&wq->fbc, ix);