* CXL_ECN_MailboxReadyTime
@ 2021-06-22 1:41 Dai WeiBin (David Dai)
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From: Dai WeiBin (David Dai) @ 2021-06-22 1:41 UTC (permalink / raw)
To: linux-cxl
Hi,
When I think of CXL mailbox interface ready and timeout, an issue is troubling me:
From CXL_ECN_MailboxReadyTime_v5.pdf, Mailbox Ready Time could be at most 3 minutes, Host BIOS maybe not be able to endure such big timeout duration, so CXL device enumeration maybe fail during BIOS stage. CXL device maybe have huge memory which needs a lot of time for training, thus device boot-up will take a long period, for this case, a big delay maybe exist before mailbox ready. I think if mailbox function doesn't ready, BIOS should not refuse CXL device if other functions work well.
Thanks,
David
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2021-06-22 1:41 CXL_ECN_MailboxReadyTime Dai WeiBin (David Dai)
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