From: Aya Levin <ayal@nvidia.com>
Date: Mon, 10 May 2021 10:13:06 +0300
Subject: net/mlx5e: Use FW limitation for max MPW WQEBBs
Patch-mainline: v5.18-rc1
Git-commit: 76c31e5f758596509fbab120b8d055bf927ed165
References: jsc#PED-1549
Calculate maximal count of MPW WQEBBs on SQ's creation and store it
there. Remove MLX5E_TX_MPW_MAX_NUM_DS and MLX5E_TX_MPW_MAX_WQEBBS.
Update mlx5e_tx_mpwqe_is_full() and mlx5e_xdp_mpqwe_is_full() .
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/mellanox/mlx5/core/en.h | 23 ++++++++++++++++++--
drivers/net/ethernet/mellanox/mlx5/core/en/params.c | 2 -
drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h | 17 +-------------
drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c | 4 +--
drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h | 7 +++---
drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 2 +
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 2 -
drivers/net/ethernet/mellanox/mlx5/core/en_tx.c | 4 +--
8 files changed, 35 insertions(+), 26 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -172,8 +172,9 @@ struct page_pool;
#define MLX5E_KLM_ENTRIES_PER_WQE(wqe_size)\
ALIGN_DOWN(MLX5E_KLM_MAX_ENTRIES_PER_WQE(wqe_size), MLX5_UMR_KLM_ALIGNMENT)
-#define MLX5E_MAX_KLM_PER_WQE \
- MLX5E_KLM_ENTRIES_PER_WQE(MLX5E_TX_MPW_MAX_NUM_DS << MLX5_MKEY_BSF_OCTO_SIZE)
+#define MLX5E_MAX_KLM_PER_WQE(mdev) \
+ MLX5E_KLM_ENTRIES_PER_WQE(mlx5e_get_sw_max_sq_mpw_wqebbs(mlx5e_get_max_sq_wqebbs(mdev)) \
+ << MLX5_MKEY_BSF_OCTO_SIZE)
#define MLX5E_MSG_LEVEL NETIF_MSG_LINK
@@ -231,6 +232,22 @@ static inline u16 mlx5e_get_max_sq_wqebb
MLX5_CAP_GEN(mdev, max_wqe_sz_sq) / MLX5_SEND_WQE_BB);
}
+static inline u16 mlx5e_get_sw_max_sq_mpw_wqebbs(u16 max_sq_wqebbs)
+{
+/* The return value will be multiplied by MLX5_SEND_WQEBB_NUM_DS.
+ * Since max_sq_wqebbs may be up to MLX5_SEND_WQE_MAX_WQEBBS == 16,
+ * see mlx5e_get_max_sq_wqebbs(), the multiplication (16 * 4 == 64)
+ * overflows the 6-bit DS field of Ctrl Segment. Use a bound lower
+ * than MLX5_SEND_WQE_MAX_WQEBBS to let a full-session WQE be
+ * cache-aligned.
+ */
+#if L1_CACHE_BYTES < 128
+ return min_t(u16, max_sq_wqebbs, MLX5_SEND_WQE_MAX_WQEBBS - 1);
+#else
+ return min_t(u16, max_sq_wqebbs, MLX5_SEND_WQE_MAX_WQEBBS - 2);
+#endif
+}
+
struct mlx5e_tx_wqe {
struct mlx5_wqe_ctrl_seg ctrl;
struct mlx5_wqe_eth_seg eth;
@@ -437,6 +454,7 @@ struct mlx5e_txqsq {
struct netdev_queue *txq;
u32 sqn;
u16 stop_room;
+ u16 max_sq_mpw_wqebbs;
u8 min_inline_mode;
struct device *pdev;
__be32 mkey_be;
@@ -551,6 +569,7 @@ struct mlx5e_xdpsq {
struct device *pdev;
__be32 mkey_be;
u16 stop_room;
+ u16 max_sq_mpw_wqebbs;
u8 min_inline_mode;
unsigned long state;
unsigned int hw_mtu;
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/params.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/params.c
@@ -717,7 +717,7 @@ static u32 mlx5e_shampo_icosq_sz(struct
int wq_size = BIT(MLX5_GET(wq, wqc, log_wq_sz));
u32 wqebbs;
- max_klm_per_umr = MLX5E_MAX_KLM_PER_WQE;
+ max_klm_per_umr = MLX5E_MAX_KLM_PER_WQE(mdev);
max_hd_per_wqe = mlx5e_shampo_hd_per_wqe(mdev, params, rq_param);
max_num_of_umr_per_wqe = max_hd_per_wqe / max_klm_per_umr;
rest = max_hd_per_wqe % max_klm_per_umr;
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
@@ -9,19 +9,6 @@
#define MLX5E_TX_WQE_EMPTY_DS_COUNT (sizeof(struct mlx5e_tx_wqe) / MLX5_SEND_WQE_DS)
-/* The mult of MLX5_SEND_WQE_MAX_WQEBBS * MLX5_SEND_WQEBB_NUM_DS
- * (16 * 4 == 64) does not fit in the 6-bit DS field of Ctrl Segment.
- * We use a bound lower that MLX5_SEND_WQE_MAX_WQEBBS to let a
- * full-session WQE be cache-aligned.
- */
-#if L1_CACHE_BYTES < 128
-#define MLX5E_TX_MPW_MAX_WQEBBS (MLX5_SEND_WQE_MAX_WQEBBS - 1)
-#else
-#define MLX5E_TX_MPW_MAX_WQEBBS (MLX5_SEND_WQE_MAX_WQEBBS - 2)
-#endif
-
-#define MLX5E_TX_MPW_MAX_NUM_DS (MLX5E_TX_MPW_MAX_WQEBBS * MLX5_SEND_WQEBB_NUM_DS)
-
#define INL_HDR_START_SZ (sizeof(((struct mlx5_wqe_eth_seg *)NULL)->inline_hdr.start))
#define MLX5E_RX_ERR_CQE(cqe) (get_cqe_opcode(cqe) != MLX5_CQE_RESP_SEND)
@@ -308,9 +295,9 @@ mlx5e_tx_dma_unmap(struct device *pdev,
void mlx5e_sq_xmit_simple(struct mlx5e_txqsq *sq, struct sk_buff *skb, bool xmit_more);
void mlx5e_tx_mpwqe_ensure_complete(struct mlx5e_txqsq *sq);
-static inline bool mlx5e_tx_mpwqe_is_full(struct mlx5e_tx_mpwqe *session)
+static inline bool mlx5e_tx_mpwqe_is_full(struct mlx5e_tx_mpwqe *session, u8 max_sq_mpw_wqebbs)
{
- return session->ds_count == MLX5E_TX_MPW_MAX_NUM_DS;
+ return session->ds_count == max_sq_mpw_wqebbs * MLX5_SEND_WQEBB_NUM_DS;
}
static inline void mlx5e_rqwq_reset(struct mlx5e_rq *rq)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
@@ -199,7 +199,7 @@ static void mlx5e_xdp_mpwqe_session_star
struct mlx5e_tx_wqe *wqe;
u16 pi;
- pi = mlx5e_xdpsq_get_next_pi(sq, MLX5E_TX_MPW_MAX_WQEBBS);
+ pi = mlx5e_xdpsq_get_next_pi(sq, sq->max_sq_mpw_wqebbs);
wqe = MLX5E_TX_FETCH_WQE(sq, pi);
net_prefetchw(wqe->data);
@@ -286,7 +286,7 @@ mlx5e_xmit_xdp_frame_mpwqe(struct mlx5e_
mlx5e_xdp_mpwqe_add_dseg(sq, xdptxd, stats);
- if (unlikely(mlx5e_xdp_mpqwe_is_full(session)))
+ if (unlikely(mlx5e_xdp_mpqwe_is_full(session, sq->max_sq_mpw_wqebbs)))
mlx5e_xdp_mpwqe_complete(sq);
mlx5e_xdpi_fifo_push(&sq->db.xdpi_fifo, xdpi);
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.h
@@ -123,12 +123,13 @@ static inline bool mlx5e_xdp_get_inline_
return cur;
}
-static inline bool mlx5e_xdp_mpqwe_is_full(struct mlx5e_tx_mpwqe *session)
+static inline bool mlx5e_xdp_mpqwe_is_full(struct mlx5e_tx_mpwqe *session, u8 max_sq_mpw_wqebbs)
{
if (session->inline_on)
return session->ds_count + MLX5E_XDP_INLINE_WQE_MAX_DS_CNT >
- MLX5E_TX_MPW_MAX_NUM_DS;
- return mlx5e_tx_mpwqe_is_full(session);
+ max_sq_mpw_wqebbs * MLX5_SEND_WQEBB_NUM_DS;
+
+ return mlx5e_tx_mpwqe_is_full(session, max_sq_mpw_wqebbs);
}
struct mlx5e_xdp_wqe_info {
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1167,6 +1167,7 @@ static int mlx5e_alloc_xdpsq(struct mlx5
&c->priv->channel_stats[c->ix]->rq_xdpsq;
sq->max_sq_wqebbs = mlx5e_get_max_sq_wqebbs(mdev);
sq->stop_room = MLX5E_STOP_ROOM(sq->max_sq_wqebbs);
+ sq->max_sq_mpw_wqebbs = mlx5e_get_sw_max_sq_mpw_wqebbs(sq->max_sq_wqebbs);
param->wq.db_numa_node = cpu_to_node(c->cpu);
err = mlx5_wq_cyc_create(mdev, ¶m->wq, sqc_wq, wq, &sq->wq_ctrl);
@@ -1328,6 +1329,7 @@ static int mlx5e_alloc_txqsq(struct mlx5
sq->min_inline_mode = params->tx_min_inline_mode;
sq->hw_mtu = MLX5E_SW2HW_MTU(params, params->sw_mtu);
sq->max_sq_wqebbs = mlx5e_get_max_sq_wqebbs(mdev);
+ sq->max_sq_mpw_wqebbs = mlx5e_get_sw_max_sq_mpw_wqebbs(sq->max_sq_wqebbs);
INIT_WORK(&sq->recover_work, mlx5e_tx_err_cqe_work);
if (!MLX5_CAP_ETH(mdev, wqe_vlan_insert))
set_bit(MLX5E_SQ_STATE_VLAN_NEED_L2_INLINE, &sq->state);
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -620,7 +620,7 @@ static int mlx5e_alloc_rx_hd_mpwqe(struc
struct mlx5e_icosq *sq = rq->icosq;
int i, err, max_klm_entries, len;
- max_klm_entries = MLX5E_MAX_KLM_PER_WQE;
+ max_klm_entries = MLX5E_MAX_KLM_PER_WQE(rq->mdev);
klm_entries = bitmap_find_window(shampo->bitmap,
shampo->hd_per_wqe,
shampo->hd_per_wq, shampo->pi);
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
@@ -544,7 +544,7 @@ static void mlx5e_tx_mpwqe_session_start
struct mlx5e_tx_wqe *wqe;
u16 pi;
- pi = mlx5e_txqsq_get_next_pi(sq, MLX5E_TX_MPW_MAX_WQEBBS);
+ pi = mlx5e_txqsq_get_next_pi(sq, sq->max_sq_mpw_wqebbs);
wqe = MLX5E_TX_FETCH_WQE(sq, pi);
net_prefetchw(wqe->data);
@@ -645,7 +645,7 @@ mlx5e_sq_xmit_mpwqe(struct mlx5e_txqsq *
mlx5e_tx_skb_update_hwts_flags(skb);
- if (unlikely(mlx5e_tx_mpwqe_is_full(&sq->mpwqe))) {
+ if (unlikely(mlx5e_tx_mpwqe_is_full(&sq->mpwqe, sq->max_sq_mpw_wqebbs))) {
/* Might stop the queue and affect the retval of __netdev_tx_sent_queue. */
cseg = mlx5e_tx_mpwqe_session_complete(sq);