ebb9b25672
This is hopefully a big no-op unless you're running some extra patches to flip on A-MSDU options in a driver. 802.11n supports sending A-MSDU in A-MPDU. That lets you do things like pack small frames into an A-MSDU and stuff /those/ into an A-MPDU. It allows for much more efficient airtime because you're not wasting time sending small frames - which is still a problem when doing A-MPDU as there's still per-frame overhead and minimum A-MPDU density requirements. It, however, is optional for 802.11n. A lot of stuff doesn't advertise it (but does it, just wait!); and I know that ath10k does it and my ath(4) driver work supports it. Now, 802.11ac makes A-MSDU in A-MPDU something that can happen more frequently, because even though you can send very large A-MPDUs (like 1 megabyte and larger) you still have the small frame problem. So, 802.11ac NICs like ath10k and iwm will support A-MSDU in A-MPDU out of the box if it's enabled - and you can negotiate it. So, let's lay down the ground work to enable A-MSDU in A-MPDU. This will allow hardware like iwn(4) and ath(4) which supports software A-MSDU but hardware A-MPDU to be more efficient. Drivers that support A-MSDU in A-MPDU will set TX/RX htcap flags. Note this is separate from the software A-MSDU encap path; /that/ dictates whether net80211 is doing A-MSDU encapsulation or not. These HTC flags control negotiation, NOT encapsulation. Once this negotiation and driver bits are done, hardware like rtwn(4), run(4), and others will be able to use A-MSDU even without A-MPDU working; right now FF and A-MSDU aren't even attempted if you're an 11n node. It's a small hold-over from the initial A-MPDU work and I know how to fix it, but to flip it on properly I need to be able to negotiate or ignore A-MSDU in A-MPDU. Oh and the fun part - some 11ac APs I've tested will quite happily decap A-MSDU in A-MPDU even though they don't negotiate it when doing 802.11n. So hey, I know it works - I just want to properly handle things. :-) Tested: * AR9380, STA/AP mode |
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| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| stand | ||
| sys | ||
| targets | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| .cirrus.yml | ||
| .clang-format | ||
| .gitattributes | ||
| .gitignore | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.libcompat | ||
| Makefile.sys.inc | ||
| ObsoleteFiles.inc | ||
| README | ||
| README.md | ||
| RELNOTES | ||
| UPDATING | ||
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