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Message-ID: <BL0PR11MB3057D0E54AA300CD4DF90F2AF2BF0@BL0PR11MB3057.namprd11.prod.outlook.com>
Date: Wed, 13 May 2020 13:00:47 +0000
From: "Ooi, Joyce" <joyce.ooi@...el.com>
To: Rob Herring <robh@...nel.org>
CC: Thor Thayer <thor.thayer@...ux.intel.com>,
"David S . Miller" <davem@...emloft.net>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Westergreen, Dalon" <dalon.westergreen@...el.com>,
"Tan, Ley Foon" <ley.foon.tan@...el.com>,
"See, Chin Liang" <chin.liang.see@...el.com>,
"Nguyen, Dinh" <dinh.nguyen@...el.com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"Ooi, Joyce" <joyce.ooi@...el.com>
Subject: RE: [PATCHv2 10/10] net: eth: altera: update devicetree bindings
documentation
> -----Original Message-----
> From: Ooi, Joyce <joyce.ooi@...el.com>
> Sent: Wednesday, May 13, 2020 8:01 PM
> To: Rob Herring <robh@...nel.org>
> Cc: Thor Thayer <thor.thayer@...ux.intel.com>; David S . Miller
> <davem@...emloft.net>; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org; Westergreen, Dalon <dalon.westergreen@...el.com>;
> Tan, Ley Foon <ley.foon.tan@...el.com>; See, Chin Liang
> <chin.liang.see@...el.com>; Nguyen, Dinh <dinh.nguyen@...el.com>;
> devicetree@...r.kernel.org; Ooi, Joyce <joyce.ooi@...el.com>
> Subject: RE: [PATCHv2 10/10] net: eth: altera: update devicetree bindings
> documentation
>
> > -----Original Message-----
> > From: Rob Herring <robh@...nel.org>
> > Sent: Wednesday, May 13, 2020 6:53 AM
> > To: Ooi, Joyce <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; Westergreen, Dalon
> > <dalon.westergreen@...el.com>; Tan, Ley Foon <ley.foon.tan@...el.com>;
> > See, Chin Liang <chin.liang.see@...el.com>; Nguyen, Dinh
> > <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.
>
> It's a 64-bit address. I'll remove the comma for this and the one above.
Found out that the comma is actually for a chip select. It was an old way of sending between the lightweight bridge and main brigde to the FPGA.
> >
> > > + 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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