• FUJITA Tomonori's avatar
    swiotlb: Export swioltb_nr_tbl and utilize it as appropiate. · 5f98ecdb
    FUJITA Tomonori authored
    By default the io_tlb_nslabs is set to zero, and gets set to
    whatever value is passed in via swiotlb_init_with_tbl function.
    The default value passed in is 64MB. However, if the user provides
    the 'swiotlb=<nslabs>' the default value is ignored and
    the value provided by the user is used... Except when the SWIOTLB
    is used under Xen - there the default value of 64MB is used and
    the Xen-SWIOTLB has no mechanism to get the 'io_tlb_nslabs' filled
    out by setup_io_tlb_npages functions. This patch provides a function
    for the Xen-SWIOTLB to call to see if the io_tlb_nslabs is set
    and if so use that value.
    Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
    Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>