diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/main.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 503ec23e84cc..358f7230da58 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -105,6 +105,11 @@ module_param(enable_64b_cqe_eqe, bool, 0444); MODULE_PARM_DESC(enable_64b_cqe_eqe, "Enable 64 byte CQEs/EQEs when the FW supports this (default: True)"); +static bool enable_4k_uar; +module_param(enable_4k_uar, bool, 0444); +MODULE_PARM_DESC(enable_4k_uar, + "Enable using 4K UAR. Should not be enabled if have VFs which do not support 4K UARs (default: false)"); + #define PF_CONTEXT_BEHAVIOUR_MASK (MLX4_FUNC_CAP_64B_EQE_CQE | \ MLX4_FUNC_CAP_EQE_CQE_STRIDE | \ MLX4_FUNC_CAP_DMFS_A0_STATIC) @@ -423,7 +428,11 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap) /* Virtual PCI function needs to determine UAR page size from * firmware. Only master PCI function can set the uar page size */ - dev->uar_page_shift = DEFAULT_UAR_PAGE_SHIFT; + if (enable_4k_uar) + dev->uar_page_shift = DEFAULT_UAR_PAGE_SHIFT; + else + dev->uar_page_shift = PAGE_SHIFT; + mlx4_set_num_reserved_uars(dev, dev_cap); } @@ -2233,11 +2242,14 @@ static int mlx4_init_hca(struct mlx4_dev *dev) dev->caps.max_fmr_maps = (1 << (32 - ilog2(dev->caps.num_mpts))) - 1; - /* Always set UAR page size 4KB, set log_uar_sz accordingly */ - init_hca.log_uar_sz = ilog2(dev->caps.num_uars) + - PAGE_SHIFT - - DEFAULT_UAR_PAGE_SHIFT; - init_hca.uar_page_sz = DEFAULT_UAR_PAGE_SHIFT - 12; + if (enable_4k_uar) { + init_hca.log_uar_sz = ilog2(dev->caps.num_uars) + + PAGE_SHIFT - DEFAULT_UAR_PAGE_SHIFT; + init_hca.uar_page_sz = DEFAULT_UAR_PAGE_SHIFT - 12; + } else { + init_hca.log_uar_sz = ilog2(dev->caps.num_uars); + init_hca.uar_page_sz = PAGE_SHIFT - 12; + } init_hca.mw_enabled = 0; if (dev->caps.flags & MLX4_DEV_CAP_FLAG_MEM_WINDOW || |