libhns: Support mmapping reset state from kernel and reporting software wc #1504
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To commit: ?? ("RDMA/hns: Support mmapping reset state to userspace").
Signed-off-by: Junxian Huang <[email protected]>
Get reset state from kernel by mmap. Signed-off-by: Chengchang Tang <[email protected]> Signed-off-by: Junxian Huang <[email protected]>
If the device has been reset, fail the post send/recv/srq_recv and return an error to notify user. Signed-off-by: Chengchang Tang <[email protected]> Signed-off-by: Junxian Huang <[email protected]>
When HW is being or has been reset, it won't generate cqe anymore, and users can't poll all work completions as expected. This patch allows userspace driver to compose the expected WCs instead of HW in this case. All SQs, RQs and SRQs is linked to a list respectively. When reset state is detected during polling CQ, walk the lists and compose software-WCs with error status IBV_WC_WR_FLUSH_ERR according to the polling number specified by users. Signed-off-by: Chengchang Tang <[email protected]> Signed-off-by: Junxian Huang <[email protected]>
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Support mmapping reset state from kernel and reporting software wc.