From e3f03f9236c25c3270aa3807ce5dcc315395ee83 Mon Sep 17 00:00:00 2001
From: Dennis Bland <dennis@dbperformance.com>
Date: Wed, 20 Apr 2022 20:40:51 -0600
Subject: [PATCH 1/5] Regulatory update for 6 GHz operation in Canada (CA)

With the 6 GHz band (U-NII-5, U-NII-6, U-NII-7, U-NII-8) in Canada, ISED
introduces the concept of a fixed PSD (Power Spectral Density) for all
supported 6 GHz channel widths.  Wider channel widths have a higher noise
floor, therefore specifying a fixed PSD allows wider channels to
operate at a higher EIRP to maintain the same S/N ratio as smaller
channel widths.

Clause 4.6.2 requires non-client (AP devices to have a maximum PSD of 5
dBm/MHz and a maximum EIRP of 30 dBm.  Clause 4.6.3 requires client (STA)
devices to have a maximum PSD of -1 dBm/MHz.  Clause 4.4 specifies a
maximum channel width of 320 MHz.  Clause 4.9 specifies indoor use only.
Operation on oil platforms, vehicles, boats, trains, and drones is
prohibited except on commercial aircraft above 10,000 feet altitude.
There is no IR (Initiate Radiation) restriction mentioned in the 6 GHz
specification.

The following equation is used to calculate the EIRP from the PSD and
channel width:

EIRP = PSD + 10*log(channel width in MHz)

Using the maximum PSD values of 5 and -1 for APs and STAs respectively,
the EIRP in dBm for a given channel width can be calculated:

Channel Width (MHz)     AP            STA
------------------------------------------------
20                      18            12
40                      21            15
80                      24            18
160                     27            21
320                     31 (max 30)   25 (max 24)

For channel widths up to 160 MHz, the maximum PSD is the limiting factor.
For the 320 MHz channel width, the maximum EIRP is the limiting factor.

Unfortunately, because there is currently no mechanism to specify
different power levels for AP and STA modes, and for different channel
widths, the smallest value has to be selected, which is 12 dBm.  This
will likely cause connectivity problems with larger channel widths until
these additional parameters can be added.

Signed-off-by: Dennis Bland <dennis@dbperformance.com>
Signed-off-by: Seth Forshee <sforshee@kernel.org>
---
 db.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/db.txt b/db.txt
index 41f94f8..062ad8a 100644
--- a/db.txt
+++ b/db.txt
@@ -298,8 +298,9 @@ country BZ: DFS-JP
 	(2402 - 2482 @ 40), (30)
 	(5735 - 5835 @ 80), (30)
 
-# Source:
+# Sources:
 # https://www.ic.gc.ca/eic/site/smt-gst.nsf/vwapj/rss-247-i2-e.pdf/$file/rss-247-i2-e.pdf
+# https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf11750.html (6 GHz operation)
 country CA: DFS-FCC
 	(2402 - 2472 @ 40), (30)
 	(5150 - 5250 @ 80), (23), NO-OUTDOOR, AUTO-BW
@@ -307,6 +308,7 @@ country CA: DFS-FCC
 	(5470 - 5600 @ 80), (24), DFS
 	(5650 - 5730 @ 80), (24), DFS
 	(5735 - 5835 @ 80), (30)
+	(5925 - 7125 @ 320), (12), NO-OUTDOOR
 
 # Source:
 # http://www.art-rca.org
-- 
2.29.2