From: Sebastien Laveze <sebastien.laveze@oss.nxp.com>
To: "David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Alexandre Torgue <alexandre.torgue@st.com>,
Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Jose Abreu <joabreu@synopsys.com>,
netdev@vger.kernel.org, devicetree@vger.kernel.org
Subject: [PATCH v1 net] dt-bindings: net: dwmac: fix queue priority documentation
Date: Mon, 11 Jan 2021 09:14:07 +0100 [thread overview]
Message-ID: <20210111081406.1348622-1-sebastien.laveze@oss.nxp.com> (raw)
From: Seb Laveze <sebastien.laveze@nxp.com>
The priority field is not the queue priority (queue priority is fixed)
but a bitmask of priorities assigned to this queue.
In receive, priorities relate to tagged frames priorities.
In transmit, priorities relate to PFC frames.
Signed-off-by: Seb Laveze <sebastien.laveze@nxp.com>
---
Documentation/devicetree/bindings/net/snps,dwmac.yaml | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index b2f6083f556a..dfbf5fe4547a 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -161,7 +161,8 @@ properties:
* snps,route-dcbcp, DCB Control Packets
* snps,route-up, Untagged Packets
* snps,route-multi-broad, Multicast & Broadcast Packets
- * snps,priority, RX queue priority (Range 0x0 to 0xF)
+ * snps,priority, bitmask of the tagged frames priorities assigned to
+ the queue
snps,mtl-tx-config:
$ref: /schemas/types.yaml#/definitions/phandle
@@ -188,7 +189,10 @@ properties:
* snps,idle_slope, unlock on WoL
* snps,high_credit, max write outstanding req. limit
* snps,low_credit, max read outstanding req. limit
- * snps,priority, TX queue priority (Range 0x0 to 0xF)
+ * snps,priority, bitmask of the priorities assigned to the queue.
+ When a PFC frame is received with priorities matching the bitmask,
+ the queue is blocked from transmitting for the pause time specified
+ in the PFC frame.
snps,reset-gpio:
deprecated: true
--
2.25.1
next reply other threads:[~2021-01-11 8:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-11 8:14 Sebastien Laveze [this message]
2021-01-11 23:30 ` [PATCH v1 net] dt-bindings: net: dwmac: fix queue priority documentation patchwork-bot+netdevbpf
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