ktls_sgl_size
twr_len += ktls_sgl_size(nsegs);
wr_len += ktls_sgl_size(*nsegsp);
wr_len += ktls_sgl_size(nsegs + (last_ghash_frag ? 1 : 0));
wr_len += ktls_sgl_size(*nsegsp + (last_ghash_frag ? 1 : 0));