Hi Thierry,
Às 11:32 AM de 3/21/2017, Thierry Reding escreveu:
> On Fri, Mar 10, 2017 at 06:24:51PM +0000, Joao Pinto wrote:
>> This patch adds the multiple queues configuration in the Device Tree.
>> It was also created a set of structures to keep the RX and TX queues
>> configurations to be used in the driver.
>>
>> Signed-off-by: Joao Pinto <jpinto@xxxxxxxxxxxx>
>> ---
>> Changes v4->v5:
>> - patch title update (stmicro replaced by stmmac)
>> Changes v2->v4:
>> - Just to keep up with patch-set version
>> Changes v1->v2:
>> - RX and TX queues child nodes had bad handle
>>
>> Documentation/devicetree/bindings/net/stmmac.txt | 40 ++++++++++
>> .../net/ethernet/stmicro/stmmac/stmmac_platform.c | 91 ++++++++++++++++++++++
>> include/linux/stmmac.h | 30 +++++++
>> 3 files changed, 161 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt
>> index d3bfc2b..4107e67 100644
>> --- a/Documentation/devicetree/bindings/net/stmmac.txt
>> +++ b/Documentation/devicetree/bindings/net/stmmac.txt
>> @@ -72,6 +72,27 @@ Optional properties:
>> - snps,mb: mixed-burst
>> - snps,rb: rebuild INCRx Burst
>> - mdio: with compatible = "snps,dwmac-mdio", create and register mdio bus.
>> +- Multiple RX Queues parameters: below the list of all the parameters to
>> + configure the multiple RX queues:
>> + - snps,rx-queues-to-use: number of RX queues to be used in the driver
>> + - Choose one of these RX scheduling algorithms:
>> + - snps,rx-sched-sp: Strict priority
>> + - snps,rx-sched-wsp: Weighted Strict priority
>> + - For each RX queue
>> + - Choose one of these modes:
>> + - snps,dcb-algorithm: Queue to be enabled as DCB
>> + - snps,avb-algorithm: Queue to be enabled as AVB
>> + - snps,map-to-dma-channel: Channel to map
>> +- Multiple TX Queues parameters: below the list of all the parameters to
>> + configure the multiple TX queues:
>> + - snps,tx-queues-to-use: number of TX queues to be used in the driver
>> + - Choose one of these TX scheduling algorithms:
>> + - snps,tx-sched-wrr: Weighted Round Robin
>> + - snps,tx-sched-wfq: Weighted Fair Queuing
>> + - snps,tx-sched-dwrr: Deficit Weighted Round Robin
>> + - snps,tx-sched-sp: Strict priority
>> + - For each TX queue
>> + - snps,weight: TX queue weight (if using a weighted algorithm)
>>
>> Examples:
>>
>> @@ -81,6 +102,23 @@ Examples:
>> snps,blen = <256 128 64 32 0 0 0>;
>> };
>>
>> + mtl_rx_setup: rx-queues-config {
>> + snps,rx-queues-to-use = <1>;
>> + snps,rx-sched-sp;
>> + queue0 {
>> + snps,dcb-algorithm;
>> + snps,map-to-dma-channel = <0x0>;
>> + };
>> + };
>> +
>> + mtl_tx_setup: tx-queues-config {
>> + snps,tx-queues-to-use = <1>;
>> + snps,tx-sched-wrr;
>> + queue0 {
>> + snps,weight = <0x10>;
>> + };
>> + };
>> +
>> gmac0: ethernet@e0800000 {
>> compatible = "st,spear600-gmac";
>> reg = <0xe0800000 0x8000>;
>> @@ -104,4 +142,6 @@ Examples:
>> phy1: ethernet-phy@0 {
>> };
>> };
>> + snps,mtl-rx-config = <&mtl_rx_setup>;
>> + snps,mtl-tx-config = <&mtl_tx_setup>;
>> };
>
> That's kind of an odd placement for these nodes. Wouldn't they be better
> located within the controller's device tree node, rather than referenced
> by phandle? Making them children of the root node leaves them completely
> without context.
>
> Thierry
>
I followed the same approach as "stmmac_axi_setup":
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/tree/Documentation/devicetree/bindings/net/stmmac.txt
I personally find it cleaner and easier to read.
Thanks,
Joao
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