linux-kernel - RE: [PATCH v8 16/18] NTB: tool: Enable the NTB/PCIe link on the local or remote side of bridge

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Date:   Mon, 7 Dec 2020 15:55:43 +0000
From:   "Jiang, Dave" <dave.jiang@...el.com>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>, Jon Mason <jdmason@...zu.us>,
        Allen Hubbe <allenbh@...il.com>,
        Tom Joseph <tjoseph@...ence.com>, Rob Herring <robh@...nel.org>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-ntb@...glegroups.com" <linux-ntb@...glegroups.com>
Subject: RE: [PATCH v8 16/18] NTB: tool: Enable the NTB/PCIe link on the local
 or remote side of bridge



> -----Original Message-----
> From: Kishon Vijay Abraham I <kishon@...com>
> Sent: Wednesday, November 11, 2020 8:36 AM
> To: Bjorn Helgaas <bhelgaas@...gle.com>; Jonathan Corbet
> <corbet@....net>; Kishon Vijay Abraham I <kishon@...com>; Lorenzo
> Pieralisi <lorenzo.pieralisi@....com>; Arnd Bergmann <arnd@...db.de>;
> Jon Mason <jdmason@...zu.us>; Jiang, Dave <dave.jiang@...el.com>;
> Allen Hubbe <allenbh@...il.com>; Tom Joseph <tjoseph@...ence.com>;
> Rob Herring <robh@...nel.org>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>; linux-
> pci@...r.kernel.org; linux-doc@...r.kernel.org; linux-
> kernel@...r.kernel.org; linux-ntb@...glegroups.com
> Subject: [PATCH v8 16/18] NTB: tool: Enable the NTB/PCIe link on the local or
> remote side of bridge
> 
> Invoke ntb_link_enable() to enable the NTB/PCIe link on the local or remote
> side of the bridge.
> 
> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> ---
>  drivers/ntb/test/ntb_tool.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/ntb/test/ntb_tool.c b/drivers/ntb/test/ntb_tool.c index
> b7bf3f863d79..8230ced503e3 100644
> --- a/drivers/ntb/test/ntb_tool.c
> +++ b/drivers/ntb/test/ntb_tool.c
> @@ -1638,6 +1638,7 @@ static int tool_probe(struct ntb_client *self, struct
> ntb_dev *ntb)
> 
>  	tool_setup_dbgfs(tc);
> 
> +	ntb_link_enable(ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);

The tool expects the user to enable the link via debugfs according to documentation. Is this necessary?

>  	return 0;
> 
>  err_clear_mws:
> --
> 2.17.1