cxgbe tom: Halve the size of offload transmit software descriptors
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Authored by jhb on Nov 26 2024, 4:47 PM.

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Summary

Use bitfields to pack tx_credits and plen into a single 32-bit word.

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rG FreeBSD src repository

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Buildable 60788
Build 57672: arc lint + arc unit

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jhb created this revision.Nov 26 2024, 4:47 PM

Herald added subscribers: ae, imp. · View Herald TranscriptNov 26 2024, 4:47 PM

jhb requested review of this revision.Nov 26 2024, 4:47 PM

Harbormaster completed remote builds in B60788: Diff 146980.Nov 26 2024, 4:47 PM

jhb added a child revision: D47760: cxgbe tom: Make t4_push_frames static to t4_cpl_io.c.Nov 26 2024, 4:48 PM

This isn't required for the other changes. Originally I was going to add another 1-bit field to struct ofld_tx_sdesc and had done this as a prep (I stole the extra bit from plen). However, I ended up not needing that change but still kept this as it does reduce memory usage a bit.