mlx4_core: Move kernel doorbell management into core

[deliverable/linux.git] / include / linux / mlx4 / device.h

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index ff7df1a2222fea4d5d5056280a0fba76eb84aab9..0a47457931ac299858c5ac126145137ddf3c6b9b 100644 (file)
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -208,6 +208,32 @@ struct mlx4_mtt {
        int                     page_shift;
 };
 
+enum {
+       MLX4_DB_PER_PAGE = PAGE_SIZE / 4
+};
+
+struct mlx4_db_pgdir {
+       struct list_head        list;
+       DECLARE_BITMAP(order0, MLX4_DB_PER_PAGE);
+       DECLARE_BITMAP(order1, MLX4_DB_PER_PAGE / 2);
+       unsigned long          *bits[2];
+       __be32                 *db_page;
+       dma_addr_t              db_dma;
+};
+
+struct mlx4_ib_user_db_page;
+
+struct mlx4_db {
+       __be32                  *db;
+       union {
+               struct mlx4_db_pgdir            *pgdir;
+               struct mlx4_ib_user_db_page     *user_page;
+       }                       u;
+       dma_addr_t              dma;
+       int                     index;
+       int                     order;
+};
+
 struct mlx4_mr {
        struct mlx4_mtt         mtt;
        u64                     iova;
@@ -341,6 +367,9 @@ int mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
 int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
                       struct mlx4_buf *buf);
 
+int mlx4_db_alloc(struct mlx4_dev *dev, struct mlx4_db *db, int order);
+void mlx4_db_free(struct mlx4_dev *dev, struct mlx4_db *db);
+
 int mlx4_cq_alloc(struct mlx4_dev *dev, int nent, struct mlx4_mtt *mtt,
                  struct mlx4_uar *uar, u64 db_rec, struct mlx4_cq *cq);
 void mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq);