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Differential D47759

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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rG4df8a30e54b6: cxgbe tom: Halve the size of offload transmit software descriptors
rGe27bb92b6fa6: cxgbe tom: Halve the size of offload transmit software descriptors
rG5a3885768490: cxgbe tom: Halve the size of offload transmit software descriptors

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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Event Timeline

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.

np accepted this revision.Sep 11 2025, 6:40 PM

This revision is now accepted and ready to land.Sep 11 2025, 6:40 PM

Closed by commit rG5a3885768490: cxgbe tom: Halve the size of offload transmit software descriptors (authored by jhb). · Explain WhySep 11 2025, 9:13 PM

This revision was automatically updated to reflect the committed changes.

jhb added a commit: rG5a3885768490: cxgbe tom: Halve the size of offload transmit software descriptors.

np added a commit: rGe27bb92b6fa6: cxgbe tom: Halve the size of offload transmit software descriptors.Oct 3 2025, 12:04 AM

jhb added a commit: rG4df8a30e54b6: cxgbe tom: Halve the size of offload transmit software descriptors.Jan 29 2026, 3:40 PM

Revision Contents
Changeset List

Path

Size

sys/

dev/

cxgbe/

cxgbei/

2 lines

iw_cxgbe/

2 lines

tom/

16 lines

4 lines

7 lines

2 lines

Diff 161931

sys/dev/cxgbe/cxgbei/icl_cxgbei.c

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sys/dev/cxgbe/iw_cxgbe/qp.c

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sys/dev/cxgbe/tom/t4_cpl_io.c

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sys/dev/cxgbe/tom/t4_tls.c

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sys/dev/cxgbe/tom/t4_tom.h

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sys/dev/cxgbe/tom/t4_tom.c

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