netdev - Re: [PATCH V2 net] net: mana: Configure hwc timeout from hardware

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Date: Fri, 7 Jul 2023 11:17:03 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: Souradeep Chakrabarti <schakrabarti@...ux.microsoft.com>
Cc: kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
	decui@...rosoft.com, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, longli@...rosoft.com,
	sharmaajay@...rosoft.com, leon@...nel.org, cai.huoqing@...ux.dev,
	ssengar@...ux.microsoft.com, vkuznets@...hat.com,
	tglx@...utronix.de, linux-hyperv@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-rdma@...r.kernel.org, stable@...r.kernel.org,
	schakrabarti@...rosoft.com
Subject: Re: [PATCH V2 net] net: mana: Configure hwc timeout from hardware

On Fri, Jul 07, 2023 at 02:45:28AM -0700, Souradeep Chakrabarti wrote:
> At present hwc timeout value is a fixed value.
> This patch sets the hwc timeout from the hardware.
> 
> Signed-off-by: Souradeep Chakrabarti <schakrabarti@...ux.microsoft.com>
> ---
> V1 -> V2:
> * Added return check for mana_gd_query_hwc_timeout
> * Removed dev_err from mana_gd_query_hwc_timeout
> ---
>  .../net/ethernet/microsoft/mana/gdma_main.c   | 30 ++++++++++++++++++-
>  .../net/ethernet/microsoft/mana/hw_channel.c  | 25 +++++++++++++++-
>  include/net/mana/gdma.h                       | 20 ++++++++++++-
>  include/net/mana/hw_channel.h                 |  5 ++++
>  4 files changed, 77 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
> index 8f3f78b68592..949c927c3a7e 100644
> --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
> +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
> @@ -106,6 +106,27 @@ static int mana_gd_query_max_resources(struct pci_dev *pdev)
>  	return 0;
>  }
>  
> +static int mana_gd_query_hwc_timeout(struct pci_dev *pdev, u32 *timeout_val)
> +{
> +	struct gdma_context *gc = pci_get_drvdata(pdev);
> +	struct gdma_query_hwc_timeout_req req = {};
> +	struct gdma_query_hwc_timeout_resp resp = {};
> +	int err;
> +
> +	mana_gd_init_req_hdr(&req.hdr, GDMA_QUERY_HWC_TIMEOUT,
> +			     sizeof(req), sizeof(resp));
> +	req.timeout_ms = *timeout_val;
> +	err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp);
> +	if (err || resp.hdr.status)
> +		return err ? err : -EPROTO;
> +
> +	*timeout_val = resp.timeout_ms;
> +	dev_info(gc->dev, "Successfully changed the timeout value %u\n",
> +		 *timeout_val);

When the kernel works properly, it is quiet.  Please always remove your
debugging code before submitting changes for inclusion.

thanks,

greg k-h