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Carl Huang 6bdb68cef7 nl80211: add common API to configure SAR power limitations 
NL80211_CMD_SET_SAR_SPECS is added to configure SAR from
user space. NL80211_ATTR_SAR_SPEC is used to pass the SAR
power specification when used with NL80211_CMD_SET_SAR_SPECS.

Wireless driver needs to register SAR type, supported frequency
ranges to wiphy, so user space can query it. The index in
frequency range is used to specify which sub band the power
limitation applies to. The SAR type is for compatibility, so later
other SAR mechanism can be implemented without breaking the user
space SAR applications.

Normal process is user space queries the SAR capability, and
gets the index of supported frequency ranges and associates the
power limitation with this index and sends to kernel.

Here is an example of message send to kernel:
8c 00 00 00 08 00 01 00 00 00 00 00 38 00 2b 81
08 00 01 00 00 00 00 00 2c 00 02 80 14 00 00 80
08 00 02 00 00 00 00 00 08 00 01 00 38 00 00 00
14 00 01 80 08 00 02 00 01 00 00 00 08 00 01 00
48 00 00 00

NL80211_CMD_SET_SAR_SPECS:  0x8c
NL80211_ATTR_WIPHY:     0x01(phy idx is 0)
NL80211_ATTR_SAR_SPEC:  0x812b (NLA_NESTED)
NL80211_SAR_ATTR_TYPE:  0x00 (NL80211_SAR_TYPE_POWER)
NL80211_SAR_ATTR_SPECS: 0x8002 (NLA_NESTED)
freq range 0 power: 0x38 in 0.25dbm unit (14dbm)
freq range 1 power: 0x48 in 0.25dbm unit (18dbm)

Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Abhishek Kumar <kuabhs@chromium.org>
Link: https://lore.kernel.org/r/20201203103728.3034-2-cjhuang@codeaurora.org
[minor edits, NLA parse cleanups]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-12-11 13:38:54 +01:00
..
certs
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
ap.c cfg80211: call disconnect_wk when AP stops 2019-02-01 11:12:50 +01:00
chan.c cfg80211: remove WDS code 2020-11-11 08:39:13 +01:00
core.c Some updates: 2020-11-13 12:03:22 -08:00
core.h nl80211: validate key indexes for cfg80211_registered_device 2020-12-11 13:20:04 +01:00
debugfs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
debugfs.h
ethtool.c cfg80211: check wiphy driver existence for drvinfo report 2020-02-07 12:53:26 +01:00
ibss.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
Kconfig lib80211: fix unmet direct dependendices config warning when !CRYPTO 2020-09-18 11:37:24 +02:00
lib80211.c lib80211: Remove unused macro DRV_NAME 2020-09-18 11:53:00 +02:00
lib80211_crypt_ccmp.c lib80211: use crypto API ccm(aes) transform for CCMP processing 2019-07-26 13:22:47 +02:00
lib80211_crypt_tkip.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
lib80211_crypt_wep.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
Makefile wireless: Skip directory when generating certificates 2019-05-14 10:27:57 +02:00
mesh.c cfg80211/mac80211: add mesh_param "mesh_nolearn" to skip path discovery 2020-07-31 09:24:23 +02:00
mlme.c cfg80211: support immediate reconnect request hint 2020-12-11 13:20:05 +01:00
nl80211.c nl80211: add common API to configure SAR power limitations 2020-12-11 13:38:54 +01:00
nl80211.h cfg80211: support immediate reconnect request hint 2020-12-11 13:20:05 +01:00
ocb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
of.c
pmsr.c nl80211: link recursive netlink nested policy 2020-04-30 17:51:41 -07:00
radiotap.c wireless: radiotap: fix some kernel-doc 2020-09-28 13:53:05 +02:00
rdev-ops.h nl80211: add common API to configure SAR power limitations 2020-12-11 13:38:54 +01:00
reg.c cfg80211: Save the regulatory domain when setting custom regulatory 2020-12-11 12:57:24 +01:00
reg.h net: Fix various misspellings of "connect" 2019-10-28 13:41:59 -07:00
scan.c cfg80211: Update TSF and TSF BSSID for multi BSS 2020-12-11 12:57:02 +01:00
sme.c net: wireless: Convert to use the preferred fallthrough macro 2020-08-27 11:24:28 +02:00
sysfs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 432 2019-06-05 17:37:16 +02:00
sysfs.h
trace.c
trace.h nl80211: add common API to configure SAR power limitations 2020-12-11 13:38:54 +01:00
util.c nl80211: validate key indexes for cfg80211_registered_device 2020-12-11 13:20:04 +01:00
wext-compat.c cfg80211: fix callback type mismatches in wext-compat 2020-12-11 12:50:27 +01:00
wext-compat.h treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
wext-core.c wireless: wext: avoid gcc -O3 warning 2020-01-15 09:52:20 +01:00
wext-priv.c
wext-proc.c proc: introduce proc_create_net{,_data} 2018-05-16 07:24:30 +02:00
wext-sme.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
wext-spy.c