net/mlx5e: Implement RX mapped page cache for page recycle

[cascardo/linux.git] / drivers / net / ethernet / mellanox / mlx5 / core / en.h

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 401b2f7..7dd4763 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -287,6 +287,18 @@ struct mlx5e_rx_am { /* Adaptive Moderation */
        u8                                      tired;
 };
 
+/* a single cache unit is capable to serve one napi call (for non-striding rq)
+ * or a MPWQE (for striding rq).
+ */
+#define MLX5E_CACHE_UNIT       (MLX5_MPWRQ_PAGES_PER_WQE > NAPI_POLL_WEIGHT ? \
+                                MLX5_MPWRQ_PAGES_PER_WQE : NAPI_POLL_WEIGHT)
+#define MLX5E_CACHE_SIZE       (2 * roundup_pow_of_two(MLX5E_CACHE_UNIT))
+struct mlx5e_page_cache {
+       u32 head;
+       u32 tail;
+       struct mlx5e_dma_info page_cache[MLX5E_CACHE_SIZE];
+};
+
 struct mlx5e_rq {
        /* data path */
        struct mlx5_wq_ll      wq;
@@ -301,6 +313,8 @@ struct mlx5e_rq {
        struct mlx5e_tstamp   *tstamp;
        struct mlx5e_rq_stats  stats;
        struct mlx5e_cq        cq;
+       struct mlx5e_page_cache page_cache;
+
        mlx5e_fp_handle_rx_cqe handle_rx_cqe;
        mlx5e_fp_alloc_wqe     alloc_wqe;
        mlx5e_fp_dealloc_wqe   dealloc_wqe;
@@ -651,6 +665,8 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget);
 int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget);
 void mlx5e_free_tx_descs(struct mlx5e_sq *sq);
 
+void mlx5e_page_release(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info,
+                       bool recycle);
 void mlx5e_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
 void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
 bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq);