net/mlx5e: Bring back bfreg uar map dedicated pointer

4K Uar series modified the mlx5e driver to use the new bfreg API,
and mistakenly removed the sq->uar_map iomem data path dedicated
pointer, which was meant to be read from xmit path for cache locality
utilization.

Fix that by returning that pointer to the SQ struct.

Fixes: 7309cb4ad71e ("IB/mlx5: Support 4k UAR for libmlx5")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 8be4b12..95ca03c 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -475,6 +475,7 @@ struct mlx5e_sq {
        /* read only */
        struct mlx5_wq_cyc         wq;
        u32                        dma_fifo_mask;
+       void __iomem              *uar_map;
        struct netdev_queue       *txq;
        u32                        sqn;
        u16                        bf_buf_size;
@@ -831,9 +832,9 @@ static inline void mlx5e_tx_notify_hw(struct mlx5e_sq *sq,
         */
        wmb();
        if (bf_sz)
-               __iowrite64_copy(sq->bfreg.map + ofst, ctrl, bf_sz);
+               __iowrite64_copy(sq->uar_map + ofst, ctrl, bf_sz);
        else
-               mlx5_write64((__be32 *)ctrl, sq->bfreg.map + ofst, NULL);
+               mlx5_write64((__be32 *)ctrl, sq->uar_map + ofst, NULL);
        /* flush the write-combining mapped buffer */
        wmb();
 

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index ed23075..3cce628 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1016,6 +1016,7 @@ static int mlx5e_create_sq(struct mlx5e_channel *c,
        if (err)
                return err;
 
+       sq->uar_map = sq->bfreg.map;
        param->wq.db_numa_node = cpu_to_node(c->cpu);
 
        err = mlx5_wq_cyc_create(mdev, &param->wq, sqc_wq, &sq->wq,