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Message-ID: <20240415163832.GA28558@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net>
Date: Mon, 15 Apr 2024 09:38:32 -0700
From: Saurabh Singh Sengar <ssengar@...ux.microsoft.com>
To: Shradha Gupta <shradhagupta@...ux.microsoft.com>
Cc: linux-kernel@...r.kernel.org, linux-hyperv@...r.kernel.org,
linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Ajay Sharma <sharmaajay@...rosoft.com>,
Leon Romanovsky <leon@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
"K. Y. Srinivasan" <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
Long Li <longli@...rosoft.com>,
Michael Kelley <mikelley@...rosoft.com>,
Shradha Gupta <shradhagupta@...rosoft.com>,
Yury Norov <yury.norov@...il.com>,
Konstantin Taranov <kotaranov@...rosoft.com>,
Souradeep Chakrabarti <schakrabarti@...ux.microsoft.com>
Subject: Re: [PATCH net-next] net: mana: Add new device attributes for mana
On Mon, Apr 15, 2024 at 02:49:49AM -0700, Shradha Gupta wrote:
> Add new device attributes to view multiport, msix, and adapter MTU
> setting for MANA device.
>
> Signed-off-by: Shradha Gupta <shradhagupta@...ux.microsoft.com>
> ---
> .../net/ethernet/microsoft/mana/gdma_main.c | 74 +++++++++++++++++++
> include/net/mana/gdma.h | 9 +++
> 2 files changed, 83 insertions(+)
>
> diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
> index 1332db9a08eb..6674a02cff06 100644
> --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
> +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
> @@ -1471,6 +1471,65 @@ static bool mana_is_pf(unsigned short dev_id)
> return dev_id == MANA_PF_DEVICE_ID;
> }
>
> +static ssize_t mana_attr_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct pci_dev *pdev = to_pci_dev(dev);
> + struct gdma_context *gc = pci_get_drvdata(pdev);
> + struct mana_context *ac = gc->mana.driver_data;
> +
> + if (strcmp(attr->attr.name, "mport") == 0)
> + return snprintf(buf, PAGE_SIZE, "%d\n", ac->num_ports);
> + else if (strcmp(attr->attr.name, "adapter_mtu") == 0)
> + return snprintf(buf, PAGE_SIZE, "%d\n", gc->adapter_mtu);
> + else if (strcmp(attr->attr.name, "msix") == 0)
> + return snprintf(buf, PAGE_SIZE, "%d\n", gc->max_num_msix);
> + else
> + return -EINVAL;
> +}
> +
> +static int mana_gd_setup_sysfs(struct pci_dev *pdev)
> +{
> + struct gdma_context *gc = pci_get_drvdata(pdev);
> + int retval = 0;
> +
> + gc->mana_attributes.mana_mport_attr.attr.name = "mport";
> + gc->mana_attributes.mana_mport_attr.attr.mode = 0444;
> + gc->mana_attributes.mana_mport_attr.show = mana_attr_show;
> + sysfs_attr_init(&gc->mana_attributes.mana_mport_attr);
> + retval = device_create_file(&pdev->dev,
> + &gc->mana_attributes.mana_mport_attr);
if you can use .dev_groups, sysfs creation and removal will be lot more
simplified for the driver.
- Saurabh
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