How to use Bilinear/Trilinear Filtering?

When i look at the display/graphics options in most of the games using opengl, i find a texture filtering option allowing me to choose between Bilinear and Trilinear Filtering, technically, all i know about filtering is that you can choose between Nearest/Linear/Mipmapping using glTexParameter, so how to get these filters mentioned above?

forgive me for my english.

GL_LINEAR is bilinear, and GL_LINEAR_MIPMAP_LINEAR is trilinear filtering.