On 10/5/2016 8:44 PM, Jason Gunthorpe wrote:
On Wed, Oct 05, 2016 at 06:16:45PM +0300, Yishai Hadas wrote:
Upon QP creation the code uses htonl for setting qp->doorbell_qpn (see
mlx4_create_qp_ex), later on this value is used without any change upon
writing a door bell. (see mmio_writel). No PCI swap is expected.
Thanks, so the mlx drivers are doing what the kernel calls writel_be()?
It's logically the same. You can look also in mlx4 driver code in the
kernel [1], writel() is used on qp->doorbell_qpn which was previously
set to be BE as the hardware expects.
[1]
http://lxr.free-electrons.com/source/drivers/infiniband/hw/mlx4/qp.c#L3223
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