[ofa-general] mlx4 support for reg_phys_mr

[James Lentini]

The upstream mlx4 driver does not support reg_phys_mr. Are there any 
plans to add support for this verb?

The reg_phys_mr verb was made optional a while back:

 http://lists.openfabrics.org/pipermail/general/2008-April/048715.html

making dma_mr the only required kernel memory registration mode. As a 
result, kernel ULPs don't have a guaranteed mechanism for creating MRs 
of limited size and fine-grained permissions since both reg_phys_mr 
and fast_reg_mr are optional. Since all HW providers except mlx4 
support reg_phys_mr, providing a reg_phys_mr implementation would fix 
this.

-james