netdev - RE: [PATCH iwl-next v2 2/5] ixgbe: Add support for E610 device capabilities detection

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Date: Wed, 24 Apr 2024 08:49:23 +0000
From: "Kwapulinski, Piotr" <piotr.kwapulinski@...el.com>
To: Simon Horman <horms@...nel.org>
CC: "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>, "Gomes, Vinicius"
	<vinicius.gomes@...el.com>, "Wegrzyn, Stefan" <stefan.wegrzyn@...el.com>,
	"Jagielski, Jedrzej" <jedrzej.jagielski@...el.com>, "Sokolowski, Jan"
	<jan.sokolowski@...el.com>
Subject: RE: [PATCH iwl-next v2 2/5] ixgbe: Add support for E610 device
 capabilities detection

 >-----Original Message-----
>From: Simon Horman <horms@...nel.org> 
>Sent: Monday, April 22, 2024 8:32 PM
>To: Kwapulinski, Piotr <piotr.kwapulinski@...el.com>
>Cc: intel-wired-lan@...ts.osuosl.org; netdev@...r.kernel.org; Gomes, Vinicius <vinicius.gomes@...el.com>; Wegrzyn, Stefan <stefan.wegrzyn@...el.com>; Jagielski, Jedrzej <jedrzej.jagielski@...el.com>; Sokolowski, Jan <jan.sokolowski@...el.com>
>Subject: Re: [PATCH iwl-next v2 2/5] ixgbe: Add support for E610 device capabilities detection
>
>On Mon, Apr 22, 2024 at 10:41:47AM +0000, Kwapulinski, Piotr wrote:
>> >-----Original Message-----
>> >From: Simon Horman <horms@...nel.org>
>> >Sent: Saturday, April 20, 2024 8:18 PM
>> >To: Kwapulinski, Piotr <piotr.kwapulinski@...el.com>
>> >Cc: intel-wired-lan@...ts.osuosl.org; netdev@...r.kernel.org; Gomes, 
>> >Vinicius <vinicius.gomes@...el.com>; Wegrzyn, Stefan 
>> ><stefan.wegrzyn@...el.com>; Jagielski, Jedrzej 
>> ><jedrzej.jagielski@...el.com>; Sokolowski, Jan 
>> ><jan.sokolowski@...el.com>
>> >Subject: Re: [PATCH iwl-next v2 2/5] ixgbe: Add support for E610 
>> >device capabilities detection
>> >
>> >On Mon, Apr 15, 2024 at 12:34:32PM +0200, Piotr Kwapulinski wrote:
>> >> Add low level support for E610 device capabilities detection. The 
>> >> capabilities are discovered via the Admin Command Interface. 
>> >> Discover the following capabilities:
>> >> - function caps: vmdq, dcb, rss, rx/tx qs, msix, nvm, orom, reset
>> >> - device caps: vsi, fdir, 1588
>> >> - phy caps
>> >> 
>> >> Co-developed-by: Stefan Wegrzyn <stefan.wegrzyn@...el.com>
>> >> Signed-off-by: Stefan Wegrzyn <stefan.wegrzyn@...el.com>
>> >> Co-developed-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
>> >> Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
>> >> Reviewed-by: Jan Sokolowski <jan.sokolowski@...el.com>
>> >> Signed-off-by: Piotr Kwapulinski <piotr.kwapulinski@...el.com>
>> >
>> >Hi Pitor,
>> >
>> >A few minor nits from my side.
>> >No need to respin just because of these.
>> >
>> >> ---
>> >>  drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c | 517
>> >> ++++++++++++++++++  drivers/net/ethernet/intel/ixgbe/ixgbe_e610.h |
>> >> 11 +
>> >>  2 files changed, 528 insertions(+)
>> >> 
>> >> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c
>> >> b/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c
>> >
>> >...
>> >
>> >> +/**
>> >> + * ixgbe_get_num_per_func - determine number of resources per PF
>> >> + * @hw: pointer to the HW structure
>> >> + * @max: value to be evenly split between each PF
>> >> + *
>> >> + * Determine the number of valid functions by going through the 
>> >> +bitmap returned
>> >> + * from parsing capabilities and use this to calculate the number 
>> >> +of resources
>> >> + * per PF based on the max value passed in.
>> >> + *
>> >> + * Return: the number of resources per PF or 0, if no PH are available.
>> >> + */
>> >> +static u32 ixgbe_get_num_per_func(struct ixgbe_hw *hw, u32 max) {
>> >> +	const u32 IXGBE_CAPS_VALID_FUNCS_M = 0xFF;
>> >
>> >nit: Maybe this could simply be a #define?
>> Hello,
>> will do
>> 
>> >
>> >> +	u8 funcs = hweight8(hw->dev_caps.common_cap.valid_functions &
>> >> +			    IXGBE_CAPS_VALID_FUNCS_M);
>> >
>> >nit: Please consider using reverse xmas tree order - longest line to shortest -
>> >     for local variables in new Networking code
>> Will do
>> 
>> >
>> >> +
>> >> +	return funcs ? (max / funcs) : 0; }
>> >
>> >...
>> >
>> >> +/**
>> >> + * ixgbe_aci_disable_rxen - disable RX
>> >> + * @hw: pointer to the HW struct
>> >> + *
>> >> + * Request a safe disable of Receive Enable using ACI command (0x000C).
>> >> + *
>> >> + * Return: the exit code of the operation.
>> >> + */
>> >> +int ixgbe_aci_disable_rxen(struct ixgbe_hw *hw) {
>> >> +	struct ixgbe_aci_cmd_disable_rxen *cmd;
>> >> +	struct ixgbe_aci_desc desc;
>> >> +
>> >> +	cmd = &desc.params.disable_rxen;
>> >> +
>> >> +	ixgbe_fill_dflt_direct_cmd_desc(&desc, 
>> >> +ixgbe_aci_opc_disable_rxen);
>> >> +
>> >> +	cmd->lport_num = (u8)hw->bus.func;
>> >
>> >nit: This cast seems unnecessary.
>> >     AFAICT the type of hw->bus.func is u8.
>> Will do
>
>Thanks. FWIIW, I think I noticed a similar cast at least once more elsewhere in the patchset
Will fix.
Thank you for review.
Piotr

>
>> 
>> >
>> >> +
>> >> +	return ixgbe_aci_send_cmd(hw, &desc, NULL, 0); }
>> >
>> >...
>> Thank you for review
>> Piotr
>>