netdev - [RFC PATCH 05/30] i40e/netpolicy: implement ndo_get_irq

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Date:	Sun, 17 Jul 2016 23:55:59 -0700
From:	kan.liang@...el.com
To:	davem@...emloft.net, linux-kernel@...r.kernel.org,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org
Cc:	jeffrey.t.kirsher@...el.com, mingo@...hat.com,
	peterz@...radead.org, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net,
	akpm@...ux-foundation.org, keescook@...omium.org,
	viro@...iv.linux.org.uk, gorcunov@...nvz.org,
	john.stultz@...aro.org, aduyck@...antis.com, ben@...adent.org.uk,
	decot@...glers.com, jesse.brandeburg@...el.com,
	andi@...stfloor.org, Kan Liang <kan.liang@...el.com>
Subject: [RFC PATCH 05/30] i40e/netpolicy: implement ndo_get_irq_info

From: Kan Liang <kan.liang@...el.com>

Implement ndo_get_irq_info in i40e driver to get irq information of rx
and tx queues.

Signed-off-by: Kan Liang <kan.liang@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 40 +++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index ee1f0b2..8a919e44 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -8996,6 +8996,45 @@ static int i40e_ndo_netpolicy_init(struct net_device *dev,
 
 	return 0;
 }
+
+/**
+ * i40e_ndo_get_irq_info
+ * @dev: the net device pointer
+ * @info: irq information which need to be updated
+ *
+ * Update irq information of tx and rx queues
+ * Returns 0 on success, negative on failure
+ */
+static int i40e_ndo_get_irq_info(struct net_device *dev,
+				 struct netpolicy_dev_info *info)
+{
+	struct i40e_netdev_priv *np = netdev_priv(dev);
+	struct i40e_vsi *vsi = np->vsi;
+	struct i40e_pf *pf = vsi->back;
+	int i;
+
+	info->rx_num = vsi->num_queue_pairs;
+	info->rx_irq = kmalloc_array(info->rx_num, sizeof(u32), GFP_KERNEL);
+	if (!info->rx_irq) {
+		info->rx_num = 0;
+		return -ENOMEM;
+	}
+
+	info->tx_num = vsi->num_queue_pairs;
+	info->tx_irq = kmalloc_array(info->tx_num, sizeof(u32), GFP_KERNEL);
+	if (!info->tx_irq) {
+		info->tx_num = 0;
+		kfree(info->rx_irq);
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < vsi->num_queue_pairs; i++) {
+		info->rx_irq[i] = pf->msix_entries[vsi->base_vector + i].vector;
+		info->tx_irq[i] = pf->msix_entries[vsi->base_vector + i].vector;
+	}
+
+	return 0;
+}
 #endif /* CONFIG_NETPOLICY */
 
 static const struct net_device_ops i40e_netdev_ops = {
@@ -9036,6 +9075,7 @@ static const struct net_device_ops i40e_netdev_ops = {
 	.ndo_bridge_setlink	= i40e_ndo_bridge_setlink,
 #ifdef CONFIG_NETPOLICY
 	.ndo_netpolicy_init	= i40e_ndo_netpolicy_init,
+	.ndo_get_irq_info	= i40e_ndo_get_irq_info,
 #endif /* CONFIG_NETPOLICY */
 };
 
-- 
2.5.5