linux-kernel - [PATCH net-next v2 2/2] net: mana: Add new device attributes for mana

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Date: Wed, 24 Apr 2024 03:34:08 -0700
From: Shradha Gupta <shradhagupta@...ux.microsoft.com>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jonathan Corbet <corbet@....net>,
	Randy Dunlap <rdunlap@...radead.org>,
	Johannes Berg <johannes.berg@...el.com>,
	Breno Leitao <leitao@...ian.org>,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	"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>,
	Souradeep Chakrabarti <schakrabarti@...ux.microsoft.com>,
	Konstantin Taranov <kotaranov@...rosoft.com>,
	Yury Norov <yury.norov@...il.com>,
	linux-hyperv@...r.kernel.org
Cc: Shradha Gupta <shradhagupta@...ux.microsoft.com>,
	shradhagupta@...rosoft.com
Subject: [PATCH net-next v2 2/2] net: mana: Add new device attributes for mana

Add new device attributes to read num_ports and max_num_msix setting for
MANA device.

Signed-off-by: Shradha Gupta <shradhagupta@...ux.microsoft.com>
---
 Changes in v2
 * Used the suggested method(v1 dicsussion) to implement sysfs device parameters
   for MANA device
 * Implemented attributes max_mtu and min_mtu generically for all device
   drivers
---
 .../net/ethernet/microsoft/mana/gdma_main.c   | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index 1332db9a08eb..e35f984e34ce 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -1471,6 +1471,37 @@ static bool mana_is_pf(unsigned short dev_id)
 	return dev_id == MANA_PF_DEVICE_ID;
 }
 
+static ssize_t num_ports_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;
+
+	return sysfs_emit(buf, "%d\n", ac->num_ports);
+}
+
+static DEVICE_ATTR_RO(num_ports);
+
+static ssize_t max_num_msix_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);
+
+	return sysfs_emit(buf, "%d\n", gc->max_num_msix);
+}
+
+static DEVICE_ATTR_RO(max_num_msix);
+
+static struct attribute *mana_gd_device_attrs[] = {
+	&dev_attr_num_ports.attr,
+	&dev_attr_max_num_msix.attr,
+	NULL,
+};
+
+ATTRIBUTE_GROUPS(mana_gd_device);
+
 static int mana_gd_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	struct gdma_context *gc;
@@ -1613,6 +1644,7 @@ static const struct pci_device_id mana_id_table[] = {
 };
 
 static struct pci_driver mana_driver = {
+	.dev_groups	= mana_gd_device_groups,
 	.name		= "mana",
 	.id_table	= mana_id_table,
 	.probe		= mana_gd_probe,
-- 
2.34.1