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The RQ/SRQ of HIP08 needs one special sge to stop receive reliably. So the driver needs to allocate at least one SGE when creating RQ/SRQ and ensure that at least one SGE is filled with the special value during post_recv. Besides, the kernel driver should only do this for kernel ULP. For userspace ULP, the userspace driver will allocate the reserved SGE in buffer, and the kernel driver just needs to pin the corresponding size of memory based on the userspace driver's requirements. Link: https://lore.kernel.org/r/1611997090-48820-2-git-send-email-liweihang@huawei.com Signed-off-by: Lang Cheng <chenglang@huawei.com> Signed-off-by: Weihang Li <liweihang@huawei.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> |
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