diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/mlx4_en.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 145 |
1 files changed, 136 insertions, 9 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index b1d7657b2bf5..35fb60e2320c 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -96,13 +96,14 @@ /* Use the maximum between 16384 and a single page */ #define MLX4_EN_ALLOC_SIZE PAGE_ALIGN(16384) -#define MLX4_EN_ALLOC_ORDER get_order(MLX4_EN_ALLOC_SIZE) -/* Receive fragment sizes; we use at most 4 fragments (for 9600 byte MTU +#define MLX4_EN_ALLOC_PREFER_ORDER PAGE_ALLOC_COSTLY_ORDER + +/* Receive fragment sizes; we use at most 3 fragments (for 9600 byte MTU * and 4K allocations) */ enum { - FRAG_SZ0 = 512 - NET_IP_ALIGN, - FRAG_SZ1 = 1024, + FRAG_SZ0 = 1536 - NET_IP_ALIGN, + FRAG_SZ1 = 4096, FRAG_SZ2 = 4096, FRAG_SZ3 = MLX4_EN_ALLOC_SIZE }; @@ -234,9 +235,10 @@ struct mlx4_en_tx_desc { #define MLX4_EN_CX3_HIGH_ID 0x1005 struct mlx4_en_rx_alloc { - struct page *page; - dma_addr_t dma; - u16 offset; + struct page *page; + dma_addr_t dma; + u32 offset; + u32 size; }; struct mlx4_en_tx_ring { @@ -290,6 +292,11 @@ struct mlx4_en_rx_ring { void *rx_info; unsigned long bytes; unsigned long packets; +#ifdef CONFIG_NET_LL_RX_POLL + unsigned long yields; + unsigned long misses; + unsigned long cleaned; +#endif unsigned long csum_ok; unsigned long csum_none; int hwtstamp_rx_filter; @@ -310,6 +317,19 @@ struct mlx4_en_cq { u16 moder_cnt; struct mlx4_cqe *buf; #define MLX4_EN_OPCODE_ERROR 0x1e + +#ifdef CONFIG_NET_LL_RX_POLL + unsigned int state; +#define MLX4_EN_CQ_STATE_IDLE 0 +#define MLX4_EN_CQ_STATE_NAPI 1 /* NAPI owns this CQ */ +#define MLX4_EN_CQ_STATE_POLL 2 /* poll owns this CQ */ +#define MLX4_CQ_LOCKED (MLX4_EN_CQ_STATE_NAPI | MLX4_EN_CQ_STATE_POLL) +#define MLX4_EN_CQ_STATE_NAPI_YIELD 4 /* NAPI yielded this CQ */ +#define MLX4_EN_CQ_STATE_POLL_YIELD 8 /* poll yielded this CQ */ +#define CQ_YIELD (MLX4_EN_CQ_STATE_NAPI_YIELD | MLX4_EN_CQ_STATE_POLL_YIELD) +#define CQ_USER_PEND (MLX4_EN_CQ_STATE_POLL | MLX4_EN_CQ_STATE_POLL_YIELD) + spinlock_t poll_lock; /* protects from LLS/napi conflicts */ +#endif /* CONFIG_NET_LL_RX_POLL */ }; struct mlx4_en_port_profile { @@ -421,8 +441,6 @@ struct mlx4_en_frag_info { u16 frag_prefix_size; u16 frag_stride; u16 frag_align; - u16 last_offset; - }; #ifdef CONFIG_MLX4_EN_DCB @@ -562,6 +580,115 @@ struct mlx4_mac_entry { struct rcu_head rcu; }; +#ifdef CONFIG_NET_LL_RX_POLL +static inline void mlx4_en_cq_init_lock(struct mlx4_en_cq *cq) +{ + spin_lock_init(&cq->poll_lock); + cq->state = MLX4_EN_CQ_STATE_IDLE; +} + +/* called from the device poll rutine to get ownership of a cq */ +static inline bool mlx4_en_cq_lock_napi(struct mlx4_en_cq *cq) +{ + int rc = true; + spin_lock(&cq->poll_lock); + if (cq->state & MLX4_CQ_LOCKED) { + WARN_ON(cq->state & MLX4_EN_CQ_STATE_NAPI); + cq->state |= MLX4_EN_CQ_STATE_NAPI_YIELD; + rc = false; + } else + /* we don't care if someone yielded */ + cq->state = MLX4_EN_CQ_STATE_NAPI; + spin_unlock(&cq->poll_lock); + return rc; +} + +/* returns true is someone tried to get the cq while napi had it */ +static inline bool mlx4_en_cq_unlock_napi(struct mlx4_en_cq *cq) +{ + int rc = false; + spin_lock(&cq->poll_lock); + WARN_ON(cq->state & (MLX4_EN_CQ_STATE_POLL | + MLX4_EN_CQ_STATE_NAPI_YIELD)); + + if (cq->state & MLX4_EN_CQ_STATE_POLL_YIELD) + rc = true; + cq->state = MLX4_EN_CQ_STATE_IDLE; + spin_unlock(&cq->poll_lock); + return rc; +} + +/* called from mlx4_en_low_latency_poll() */ +static inline bool mlx4_en_cq_lock_poll(struct mlx4_en_cq *cq) +{ + int rc = true; + spin_lock_bh(&cq->poll_lock); + if ((cq->state & MLX4_CQ_LOCKED)) { + struct net_device *dev = cq->dev; + struct mlx4_en_priv *priv = netdev_priv(dev); + struct mlx4_en_rx_ring *rx_ring = &priv->rx_ring[cq->ring]; + + cq->state |= MLX4_EN_CQ_STATE_POLL_YIELD; + rc = false; + rx_ring->yields++; + } else + /* preserve yield marks */ + cq->state |= MLX4_EN_CQ_STATE_POLL; + spin_unlock_bh(&cq->poll_lock); + return rc; +} + +/* returns true if someone tried to get the cq while it was locked */ +static inline bool mlx4_en_cq_unlock_poll(struct mlx4_en_cq *cq) +{ + int rc = false; + spin_lock_bh(&cq->poll_lock); + WARN_ON(cq->state & (MLX4_EN_CQ_STATE_NAPI)); + + if (cq->state & MLX4_EN_CQ_STATE_POLL_YIELD) + rc = true; + cq->state = MLX4_EN_CQ_STATE_IDLE; + spin_unlock_bh(&cq->poll_lock); + return rc; +} + +/* true if a socket is polling, even if it did not get the lock */ +static inline bool mlx4_en_cq_ll_polling(struct mlx4_en_cq *cq) +{ + WARN_ON(!(cq->state & MLX4_CQ_LOCKED)); + return cq->state & CQ_USER_PEND; +} +#else +static inline void mlx4_en_cq_init_lock(struct mlx4_en_cq *cq) +{ +} + +static inline bool mlx4_en_cq_lock_napi(struct mlx4_en_cq *cq) +{ + return true; +} + +static inline bool mlx4_en_cq_unlock_napi(struct mlx4_en_cq *cq) +{ + return false; +} + +static inline bool mlx4_en_cq_lock_poll(struct mlx4_en_cq *cq) +{ + return false; +} + +static inline bool mlx4_en_cq_unlock_poll(struct mlx4_en_cq *cq) +{ + return false; +} + +static inline bool mlx4_en_cq_ll_polling(struct mlx4_en_cq *cq) +{ + return false; +} +#endif /* CONFIG_NET_LL_RX_POLL */ + #define MLX4_EN_WOL_DO_MODIFY (1ULL << 63) void mlx4_en_update_loopback_state(struct net_device *dev, |