1.4.5 Buffer and MDL Management
ADDRESS_AND_SIZE_TO_SPAN_PAGES
Returns the number of pages required to contain a given virtual address and size in bytes.
Returns the byte offset of a given virtual address within the page.
Returns the number of pages necessary to contain a given number of bytes.
Returns the page-aligned virtual address for the page that contains a given virtual address.
Rounds a give size in bytes up to a page-size multiple.