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Differential D20144

ahci: Check if bus is cache-coherent
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Authored by manu on May 2 2019, 4:29 PM.
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Details

Reviewers
mav
andrew
Group Reviewers
arm64
Commits
rS362240: MFC r347440, r347929-r347930, r349588
rS347440: ahci: Check if bus is cache-coherent
Summary

We do this for FDT systems but not for ACPI ones.
Check the presence of the _CCA attribute.




Sponsored by:      Ampere Computing, LLC
Test Plan
Tested on Ampere eMAG, ~x2 for read speed ~x1.7 for writes.

Tested also on my SoftIron Overdrive 1000, it now give the same perf as when I boot it with FDT
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Repository 
rS FreeBSD src repository - subversion 
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head/
sys/
dev/
ahci/
7 lines
Diff 57272
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head/sys/dev/ahci/ahci_generic.c
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