From f164be8c03663034416d019c355fbbd2dbd189d7 Mon Sep 17 00:00:00 2001 From: Yishai Hadas Date: Thu, 12 Dec 2019 13:09:26 +0200 Subject: [PATCH] IB/mlx5: Extend caps stage to handle VAR capabilities Extend caps stage to handle VAR capabilities. Link: https://lore.kernel.org/r/20191212110928.334995-4-leon@kernel.org Signed-off-by: Yishai Hadas Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/mlx5/main.c | 40 ++++++++++++++++++++++++++++++++++-- drivers/infiniband/hw/mlx5/mlx5_ib.h | 10 +++++++++ 2 files changed, 48 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 05b557d..e6aa836 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -6335,6 +6335,35 @@ static const struct ib_device_ops mlx5_ib_dev_dm_ops = { .reg_dm_mr = mlx5_ib_reg_dm_mr, }; +static int mlx5_ib_init_var_table(struct mlx5_ib_dev *dev) +{ + struct mlx5_core_dev *mdev = dev->mdev; + struct mlx5_var_table *var_table = &dev->var_table; + u8 log_doorbell_bar_size; + u8 log_doorbell_stride; + u64 bar_size; + + log_doorbell_bar_size = MLX5_CAP_DEV_VDPA_EMULATION(mdev, + log_doorbell_bar_size); + log_doorbell_stride = MLX5_CAP_DEV_VDPA_EMULATION(mdev, + log_doorbell_stride); + var_table->hw_start_addr = dev->mdev->bar_addr + + MLX5_CAP64_DEV_VDPA_EMULATION(mdev, + doorbell_bar_offset); + bar_size = (1ULL << log_doorbell_bar_size) * 4096; + var_table->stride_size = 1ULL << log_doorbell_stride; + var_table->num_var_hw_entries = bar_size / var_table->stride_size; + mutex_init(&var_table->bitmap_lock); + var_table->bitmap = bitmap_zalloc(var_table->num_var_hw_entries, + GFP_KERNEL); + return (var_table->bitmap) ? 0 : -ENOMEM; +} + +static void mlx5_ib_stage_caps_cleanup(struct mlx5_ib_dev *dev) +{ + bitmap_free(dev->var_table.bitmap); +} + static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev) { struct mlx5_core_dev *mdev = dev->mdev; @@ -6422,6 +6451,13 @@ static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev) MLX5_CAP_GEN(dev->mdev, disable_local_lb_mc))) mutex_init(&dev->lb.mutex); + if (MLX5_CAP_GEN_64(dev->mdev, general_obj_types) & + MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q) { + err = mlx5_ib_init_var_table(dev); + if (err) + return err; + } + dev->ib_dev.use_cq_dim = true; return 0; @@ -6772,7 +6808,7 @@ static const struct mlx5_ib_profile pf_profile = { mlx5_ib_stage_flow_db_cleanup), STAGE_CREATE(MLX5_IB_STAGE_CAPS, mlx5_ib_stage_caps_init, - NULL), + mlx5_ib_stage_caps_cleanup), STAGE_CREATE(MLX5_IB_STAGE_NON_DEFAULT_CB, mlx5_ib_stage_non_default_cb, NULL), @@ -6829,7 +6865,7 @@ const struct mlx5_ib_profile raw_eth_profile = { mlx5_ib_stage_flow_db_cleanup), STAGE_CREATE(MLX5_IB_STAGE_CAPS, mlx5_ib_stage_caps_init, - NULL), + mlx5_ib_stage_caps_cleanup), STAGE_CREATE(MLX5_IB_STAGE_NON_DEFAULT_CB, mlx5_ib_stage_raw_eth_non_default_cb, NULL), diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index 9279483..d3ec11f 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -959,6 +959,15 @@ struct mlx5_devx_event_table { struct xarray event_xa; }; +struct mlx5_var_table { + /* serialize updating the bitmap */ + struct mutex bitmap_lock; + unsigned long *bitmap; + u64 hw_start_addr; + u32 stride_size; + u64 num_var_hw_entries; +}; + struct mlx5_ib_dev { struct ib_device ib_dev; struct mlx5_core_dev *mdev; @@ -1013,6 +1022,7 @@ struct mlx5_ib_dev { struct mlx5_srq_table srq_table; struct mlx5_async_ctx async_ctx; struct mlx5_devx_event_table devx_event_table; + struct mlx5_var_table var_table; struct xarray sig_mrs; }; -- 2.7.4