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Date: Tue, 12 May 2020 17:52:40 -0500
From: Rob Herring <robh@...nel.org>
To: Joyce Ooi <joyce.ooi@...el.com>
Cc: Thor Thayer <thor.thayer@...ux.intel.com>,
"David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
Dalon Westergreen <dalon.westergreen@...el.com>,
Tan Ley Foon <ley.foon.tan@...el.com>,
See Chin Liang <chin.liang.see@...el.com>,
Dinh Nguyen <dinh.nguyen@...el.com>, devicetree@...r.kernel.org
Subject: Re: [PATCHv2 10/10] net: eth: altera: update devicetree bindings
documentation
On Mon, May 04, 2020 at 04:25:58PM +0800, Joyce Ooi wrote:
> From: Dalon Westergreen <dalon.westergreen@...el.com>
>
> Update devicetree bindings documentation to include msgdma
> prefetcher and ptp bindings.
>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Dalon Westergreen <dalon.westergreen@...el.com>
> Signed-off-by: Joyce Ooi <joyce.ooi@...el.com>
> ---
> v2: no change
> ---
> .../devicetree/bindings/net/altera_tse.txt | 103 +++++++++++++++++----
> 1 file changed, 84 insertions(+), 19 deletions(-)
Reviewed-by: Rob Herring <robh@...nel.org>
One nit below.
>
> diff --git a/Documentation/devicetree/bindings/net/altera_tse.txt b/Documentation/devicetree/bindings/net/altera_tse.txt
> index 0b7d4d3758ea..2f2d12603907 100644
> --- a/Documentation/devicetree/bindings/net/altera_tse.txt
> +++ b/Documentation/devicetree/bindings/net/altera_tse.txt
> @@ -2,53 +2,86 @@
>
> Required properties:
> - compatible: Should be "altr,tse-1.0" for legacy SGDMA based TSE, and should
> - be "altr,tse-msgdma-1.0" for the preferred MSGDMA based TSE.
> + be "altr,tse-msgdma-1.0" for the preferred MSGDMA based TSE,
> + and "altr,tse-msgdma-2.0" for MSGDMA with prefetcher based
> + implementations.
> ALTR is supported for legacy device trees, but is deprecated.
> altr should be used for all new designs.
> - reg: Address and length of the register set for the device. It contains
> the information of registers in the same order as described by reg-names
> - reg-names: Should contain the reg names
> - "control_port": MAC configuration space region
> - "tx_csr": xDMA Tx dispatcher control and status space region
> - "tx_desc": MSGDMA Tx dispatcher descriptor space region
> - "rx_csr" : xDMA Rx dispatcher control and status space region
> - "rx_desc": MSGDMA Rx dispatcher descriptor space region
> - "rx_resp": MSGDMA Rx dispatcher response space region
> - "s1": SGDMA descriptor memory
> - interrupts: Should contain the TSE interrupts and it's mode.
> - interrupt-names: Should contain the interrupt names
> - "rx_irq": xDMA Rx dispatcher interrupt
> - "tx_irq": xDMA Tx dispatcher interrupt
> + "rx_irq": DMA Rx dispatcher interrupt
> + "tx_irq": DMA Tx dispatcher interrupt
> - rx-fifo-depth: MAC receive FIFO buffer depth in bytes
> - tx-fifo-depth: MAC transmit FIFO buffer depth in bytes
> - phy-mode: See ethernet.txt in the same directory.
> - phy-handle: See ethernet.txt in the same directory.
> - phy-addr: See ethernet.txt in the same directory. A configuration should
> include phy-handle or phy-addr.
> -- altr,has-supplementary-unicast:
> - If present, TSE supports additional unicast addresses.
> - Otherwise additional unicast addresses are not supported.
> -- altr,has-hash-multicast-filter:
> - If present, TSE supports a hash based multicast filter.
> - Otherwise, hash-based multicast filtering is not supported.
> -
> - mdio device tree subnode: When the TSE has a phy connected to its local
> mdio, there must be device tree subnode with the following
> required properties:
> -
> - compatible: Must be "altr,tse-mdio".
> - #address-cells: Must be <1>.
> - #size-cells: Must be <0>.
>
> For each phy on the mdio bus, there must be a node with the following
> fields:
> -
> - reg: phy id used to communicate to phy.
> - device_type: Must be "ethernet-phy".
>
> The MAC address will be determined using the optional properties defined in
> ethernet.txt.
>
> +- altr,has-supplementary-unicast:
> + If present, TSE supports additional unicast addresses.
> + Otherwise additional unicast addresses are not supported.
> +- altr,has-hash-multicast-filter:
> + If present, TSE supports a hash based multicast filter.
> + Otherwise, hash-based multicast filtering is not supported.
> +- altr,has-ptp:
> + If present, TSE supports 1588 timestamping. Currently only
> + supported with the msgdma prefetcher.
> +- altr,tx-poll-cnt:
> + Optional cycle count for Tx prefetcher to poll descriptor
> + list. If not present, defaults to 128, which at 125MHz is
> + roughly 1usec. Only for "altr,tse-msgdma-2.0".
> +- altr,rx-poll-cnt:
> + Optional cycle count for Tx prefetcher to poll descriptor
> + list. If not present, defaults to 128, which at 125MHz is
> + roughly 1usec. Only for "altr,tse-msgdma-2.0".
> +
> +Required registers by compatibility string:
> + - "altr,tse-1.0"
> + "control_port": MAC configuration space region
> + "tx_csr": DMA Tx dispatcher control and status space region
> + "rx_csr" : DMA Rx dispatcher control and status space region
> + "s1": DMA descriptor memory
> +
> + - "altr,tse-msgdma-1.0"
> + "control_port": MAC configuration space region
> + "tx_csr": DMA Tx dispatcher control and status space region
> + "tx_desc": DMA Tx dispatcher descriptor space region
> + "rx_csr" : DMA Rx dispatcher control and status space region
> + "rx_desc": DMA Rx dispatcher descriptor space region
> + "rx_resp": DMA Rx dispatcher response space region
> +
> + - "altr,tse-msgdma-2.0"
> + "control_port": MAC configuration space region
> + "tx_csr": DMA Tx dispatcher control and status space region
> + "tx_pref": DMA Tx prefetcher configuration space region
> + "rx_csr" : DMA Rx dispatcher control and status space region
> + "rx_pref": DMA Rx prefetcher configuration space region
> + "tod_ctrl": Time of Day Control register only required when
> + timestamping support is enabled. Timestamping is
> + only supported with the msgdma-2.0 implementation.
> +
> +Optional properties:
> +- local-mac-address: See ethernet.txt in the same directory.
> +- max-frame-size: See ethernet.txt in the same directory.
> +
> Example:
>
> tse_sub_0_eth_tse_0: ethernet@1,00000000 {
> @@ -86,6 +119,11 @@ Example:
> device_type = "ethernet-phy";
> };
>
> + phy2: ethernet-phy@2 {
> + reg = <0x2>;
> + device_type = "ethernet-phy";
> + };
> +
> };
> };
>
> @@ -111,3 +149,30 @@ Example:
> altr,has-hash-multicast-filter;
> phy-handle = <&phy1>;
> };
> +
> +
> + tse_sub_2_eth_tse_0: ethernet@1,00002000 {
What bus is this on? Usually a ',' like this is for a chip select
number. If just a 64-bit address, then no comma.
> + compatible = "altr,tse-msgdma-2.0";
> + reg = <0x00000001 0x00002000 0x00000400>,
> + <0x00000001 0x00002400 0x00000020>,
> + <0x00000001 0x00002420 0x00000020>,
> + <0x00000001 0x00002440 0x00000020>,
> + <0x00000001 0x00002460 0x00000020>,
> + <0x00000001 0x00002480 0x00000040>;
> + reg-names = "control_port", "rx_csr", "rx_pref","tx_csr", "tx_pref", "tod_ctrl";
> + interrupt-parent = <&hps_0_arm_gic_0>;
> + interrupts = <0 45 4>, <0 44 4>;
> + interrupt-names = "rx_irq", "tx_irq";
> + rx-fifo-depth = <2048>;
> + tx-fifo-depth = <2048>;
> + address-bits = <48>;
> + max-frame-size = <1500>;
> + local-mac-address = [ 00 00 00 00 00 00 ];
> + phy-mode = "sgmii";
> + altr,has-supplementary-unicast;
> + altr,has-hash-multicast-filter;
> + altr,has-ptp;
> + altr,tx-poll-cnt = <128>;
> + altr,rx-poll-cnt = <32>;
> + phy-handle = <&phy2>;
> + };
> --
> 2.13.0
>
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