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Subject: [feature request] set regulatory domain per device and some other
 fixes
From:   Bogdan <bogdan.pylypenko107@gmail.com>
Reply-To: bogdan.pylypenko107@gmail.com
To:     linux-wireless@vger.kernel.org, zerochaos@gentoo.org
Date:   Sun, 25 Jul 2021 07:57:33 +0300
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Hi!

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email linux-wireless@vger.kernel.org finded at https://wireless.wiki.kernel.org/en/developers/mailinglists
email zerochaos@gentoo.org finded in iw package metadata

## My system:

```
$ cat /etc/os-release | grep PRETTY_NAME=
PRETTY_NAME="Gentoo/Linux"

$ uname -r
5.13.3-gentoo-x86_64

$ eix net-wireless/iw -Ic --format '<installedversions:EQNAMEVERSION>'
=net-wireless/iw-5.9

$ equery m iw | grep Maintainer
Maintainer:  zerochaos@gentoo.org
```

### My devices:
```
$ lspci -k | grep -A2 Wireless
03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8822CE 802.11ac PCIe Wireless Network Adapter
 DeviceName: Realtek Wireless LAN + BT
 Subsystem: Hewlett-Packard Company RTL8822CE 802.11ac PCIe Wireless Network Adapter
 Kernel driver in use: rtw_8822ce
 Kernel modules: rtw88_8822ce

$ lsusb | grep Wireless
Bus 003 Device 012: ID 148f:7601 Ralink Technology, Corp. MT7601U Wireless Adapter
$ lsusb -s 03.012 -t | grep -i "Dev 12"
 |__ Port 1: Dev 12, If 0, Class=Vendor Specific Class, Driver=mt7601u, 480M
```

### Kernel drivers:
```
$ zgrep -i rtw88 /proc/config.gz
CONFIG_RTW88=m
CONFIG_RTW88_CORE=m
CONFIG_RTW88_PCI=m
CONFIG_RTW88_8822C=m
# CONFIG_RTW88_8822BE is not set
CONFIG_RTW88_8822CE=m
# CONFIG_RTW88_8723DE is not set
# CONFIG_RTW88_8821CE is not set
# CONFIG_RTW88_DEBUG is not set
# CONFIG_RTW88_DEBUGFS is not set

$ zgrep 7601 /proc/config.gz
CONFIG_MT7601U=m
```

### Device names:
```
$ iw dev | grep -A1 phy
phy#1
        Interface wlan1
--
phy#0
        Interface wlan0

$ iw list | grep Wiphy
Wiphy phy1
Wiphy phy0
```

### Quick resolution:
```
<dev>   <phy>  <driver>     <type>
wlan0 - phy0 - rtw_8822ce - M.2 (PCIe) adapter
wlan1 - phy1 - mt7601u    - USB dongle
```

## Problem #1 - iw tool has no commands to set regulatory domain per device
I want to set regulatory domain (CRDA) only for device wlan1, not globally for all devices wlan0 & wlan1, but iw support configuring regulatory domain only globally:
```
$ iw | grep reg
 reg reload
 phy <phyname> reg get
 reg get
 reg set <ISO/IEC 3166-1 alpha2>
```

## Problem #2 - iw tool output incorrectly list of devices
iw lists only global section and section for inbound wlan0 (phy#0) device.
Device wlan1 (phy1) not listed in second command.
```
$ iw list | grep Wiphy
Wiphy phy1
Wiphy phy0
$ iw reg get | grep phy
phy#0
```

## Problem #3 - iw tool say phy names in two different forms
This command input phy name in "phy0" form, but output in "phy#0" form.
```
$ iw list | grep Wiphy
Wiphy phy1
Wiphy phy0
$ iw dev | grep "^phy"
phy#1
phy#0
$ iw phy phy0 reg get | grep phy
phy#0
```

## Problem #4 - iw tool set globally configured regulatory domain only for external adapter

### Unset regulatroy domain globally:
```
$ sudo iw reg set 00

$ iw reg get
global
country 00: DFS-UNSET
 (2402 - 2472 @ 40), (N/A, 20), (N/A)
 (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
 (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
 (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
 (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
 (57240 - 63720 @ 2160), (N/A, 0), (N/A)

phy#0
country 00: DFS-UNSET
 (2402 - 2472 @ 40), (N/A, 20), (N/A)
 (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
 (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
 (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
 (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
 (57240 - 63720 @ 2160), (N/A, 0), (N/A)

$ iw phy phy0 reg get
phy#0
country 00: DFS-UNSET
 (2402 - 2472 @ 40), (N/A, 20), (N/A)
 (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
 (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
 (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
 (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
 (57240 - 63720 @ 2160), (N/A, 0), (N/A

$ iw phy phy1 reg get
phy#1
country 00: DFS-UNSET
 (2402 - 2472 @ 40), (N/A, 20), (N/A)
 (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
 (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
 (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
 (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
 (57240 - 63720 @ 2160), (N/A, 0), (N/A)
```


### Set regulatroy domain for country BR:
```
$ sudo iw reg set BR

$ iw reg get
global
country BR: DFS-FCC
 (2402 - 2482 @ 40), (N/A, 20), (N/A)
 (5170 - 5250 @ 80), (N/A, 17), (N/A), AUTO-BW
 (5250 - 5330 @ 80), (N/A, 24), (0 ms), DFS, AUTO-BW
 (5490 - 5730 @ 160), (N/A, 24), (0 ms), DFS
 (5735 - 5835 @ 80), (N/A, 30), (N/A)

phy#0
country 00: DFS-UNSET
 (2402 - 2472 @ 40), (N/A, 20), (N/A)
 (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
 (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
 (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
 (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
 (57240 - 63720 @ 2160), (N/A, 0), (N/A)

$ iw phy phy0 reg get
phy#0
country 00: DFS-UNSET
 (2402 - 2472 @ 40), (N/A, 20), (N/A)
 (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
 (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
 (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
 (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
 (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
 (57240 - 63720 @ 2160), (N/A, 0), (N/A)

$ iw phy phy1 reg get
global
country BR: DFS-FCC
 (2402 - 2482 @ 40), (N/A, 20), (N/A)
 (5170 - 5250 @ 80), (N/A, 17), (N/A), AUTO-BW
 (5250 - 5330 @ 80), (N/A, 24), (0 ms), DFS, AUTO-BW
 (5490 - 5730 @ 160), (N/A, 24), (0 ms), DFS
 (5735 - 5835 @ 80), (N/A, 30), (N/A)
```

## Feature requests
### 1) Normalize phy names format
I want to see phy names in "iw reg get" outputs in form, correct as phy name for iw input.
E.g.: if I see "phy#0" string as physical interface name in "iw reg get" output, then iw must accept "phy#0" string as correct physical interface name in "iw phy <phyname> reg get" input:
```
$ iw phy phy0 reg get | grep phy
phy#0
$ iw phy phy#0 reg get
command failed: No such file or directory (-2)
```
I prefer to use phy names without "#" prefix for phy number - in unique form with 'iw list | grep Wiphy' command.

### 2) Fix "iw reg" command to show all devices
"iw reg" command must show all devices, listed in "iw list".

### 3) Fix "iw reg" command to set regulatory domain really for all devices
Global variant of "iw reg set <COUNTRY>" command must set regulatory domain really for all devices.

### 4) Add command to set regulatory domain per phy by phy name
Example:
```
iw phy0 reg set BR
```

### 4) Add command to set regulatory domain per phy by device name
Example:
```
iw dev wlan0 reg set BR
```
Inside iw, device name "wlan0" transformed to his phy name "phy0", and regulatory domain configured to those "phy0" physical interface.