static int create_indirect_key()

in mlx5/core/mr.c [182:216]

• 32 lines of code
• 4 McCabe index (conditional complexity)

static int create_indirect_key(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_mr *mr)
{
	int inlen;
	void *mkc;
	void *in;
	int err;
	u64 start;
	u64 len;

	start = indir_start_addr(mr);
	len = indir_len(mr);
	if (start == MLX5_VDPA_INVALID_START_ADDR || len == MLX5_VDPA_INVALID_LEN)
		return -EINVAL;

	inlen = MLX5_ST_SZ_BYTES(create_mkey_in) + klm_byte_size(mr->num_klms);
	in = kzalloc(inlen, GFP_KERNEL);
	if (!in)
		return -ENOMEM;

	MLX5_SET(create_mkey_in, in, uid, mvdev->res.uid);
	mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
	MLX5_SET(mkc, mkc, lw, 1);
	MLX5_SET(mkc, mkc, lr, 1);
	mlx5_set_access_mode(mkc, MLX5_MKC_ACCESS_MODE_KLMS);
	MLX5_SET(mkc, mkc, qpn, 0xffffff);
	MLX5_SET(mkc, mkc, pd, mvdev->res.pdn);
	MLX5_SET64(mkc, mkc, start_addr, start);
	MLX5_SET64(mkc, mkc, len, len);
	MLX5_SET(mkc, mkc, translations_octword_size, klm_byte_size(mr->num_klms) / 16);
	MLX5_SET(create_mkey_in, in, translations_octword_actual_size, mr->num_klms);
	fill_indir(mvdev, mr, in);
	err = mlx5_vdpa_create_mkey(mvdev, &mr->mkey, in, inlen);
	kfree(in);
	return err;
}