/* 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
};
#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 {
void *rx_info;
unsigned long bytes;
unsigned long packets;
+#ifdef CONFIG_NET_RX_BUSY_POLL
+ unsigned long yields;
+ unsigned long misses;
+ unsigned long cleaned;
+#endif
unsigned long csum_ok;
unsigned long csum_none;
int hwtstamp_rx_filter;
u16 moder_cnt;
struct mlx4_cqe *buf;
#define MLX4_EN_OPCODE_ERROR 0x1e
+
+#ifdef CONFIG_NET_RX_BUSY_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_RX_BUSY_POLL */
};
struct mlx4_en_port_profile {
u16 frag_prefix_size;
u16 frag_stride;
u16 frag_align;
- u16 last_offset;
-
};
#ifdef CONFIG_MLX4_EN_DCB
struct rcu_head rcu;
};
+#ifdef CONFIG_NET_RX_BUSY_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_RX_BUSY_POLL */
+
#define MLX4_EN_WOL_DO_MODIFY (1ULL << 63)
void mlx4_en_update_loopback_state(struct net_device *dev,
projects / karo-tx-linux.git / blobdiff