diff options
Diffstat (limited to 'kernel/drivers/net/ethernet/mellanox/mlx5/core/uar.c')
| -rw-r--r-- | kernel/drivers/net/ethernet/mellanox/mlx5/core/uar.c | 50 |
1 files changed, 47 insertions, 3 deletions
diff --git a/kernel/drivers/net/ethernet/mellanox/mlx5/core/uar.c b/kernel/drivers/net/ethernet/mellanox/mlx5/core/uar.c index 5a89bb1d6..eb05c845e 100644 --- a/kernel/drivers/net/ethernet/mellanox/mlx5/core/uar.c +++ b/kernel/drivers/net/ethernet/mellanox/mlx5/core/uar.c @@ -32,6 +32,7 @@ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/io-mapping.h> #include <linux/mlx5/driver.h> #include <linux/mlx5/cmd.h> #include "mlx5_core.h" @@ -175,12 +176,13 @@ int mlx5_alloc_uuars(struct mlx5_core_dev *dev, struct mlx5_uuar_info *uuari) for (i = 0; i < tot_uuars; i++) { bf = &uuari->bfs[i]; - bf->buf_size = dev->caps.gen.bf_reg_size / 2; + bf->buf_size = (1 << MLX5_CAP_GEN(dev, log_bf_reg_size)) / 2; bf->uar = &uuari->uars[i / MLX5_BF_REGS_PER_PAGE]; bf->regreg = uuari->uars[i / MLX5_BF_REGS_PER_PAGE].map; bf->reg = NULL; /* Add WC support */ - bf->offset = (i % MLX5_BF_REGS_PER_PAGE) * dev->caps.gen.bf_reg_size + - MLX5_BF_OFFSET; + bf->offset = (i % MLX5_BF_REGS_PER_PAGE) * + (1 << MLX5_CAP_GEN(dev, log_bf_reg_size)) + + MLX5_BF_OFFSET; bf->need_lock = need_uuar_lock(i); spin_lock_init(&bf->lock); spin_lock_init(&bf->lock32); @@ -223,3 +225,45 @@ int mlx5_free_uuars(struct mlx5_core_dev *dev, struct mlx5_uuar_info *uuari) return 0; } + +int mlx5_alloc_map_uar(struct mlx5_core_dev *mdev, struct mlx5_uar *uar) +{ + phys_addr_t pfn; + phys_addr_t uar_bar_start; + int err; + + err = mlx5_cmd_alloc_uar(mdev, &uar->index); + if (err) { + mlx5_core_warn(mdev, "mlx5_cmd_alloc_uar() failed, %d\n", err); + return err; + } + + uar_bar_start = pci_resource_start(mdev->pdev, 0); + pfn = (uar_bar_start >> PAGE_SHIFT) + uar->index; + uar->map = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE); + if (!uar->map) { + mlx5_core_warn(mdev, "ioremap() failed, %d\n", err); + err = -ENOMEM; + goto err_free_uar; + } + + if (mdev->priv.bf_mapping) + uar->bf_map = io_mapping_map_wc(mdev->priv.bf_mapping, + uar->index << PAGE_SHIFT); + + return 0; + +err_free_uar: + mlx5_cmd_free_uar(mdev, uar->index); + + return err; +} +EXPORT_SYMBOL(mlx5_alloc_map_uar); + +void mlx5_unmap_free_uar(struct mlx5_core_dev *mdev, struct mlx5_uar *uar) +{ + io_mapping_unmap(uar->bf_map); + iounmap(uar->map); + mlx5_cmd_free_uar(mdev, uar->index); +} +EXPORT_SYMBOL(mlx5_unmap_free_uar); |