netdev - [PATCH net-next 09/14] net/mlx5: Refactor completion irq request/release code

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Date:   Sun, 19 Feb 2023 22:14:37 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>, Eli Cohen <elic@...dia.com>,
        Shay Drory <shayd@...dia.com>
Subject: [PATCH net-next 09/14] net/mlx5: Refactor completion irq request/release code

From: Eli Cohen <elic@...dia.com>

Break the request and release functions into pci and sub-functions
devices handling for better readability, eventually making the code
symmetric in terms of request/release.

Signed-off-by: Eli Cohen <elic@...dia.com>
Reviewed-by: Shay Drory <shayd@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/eq.c | 70 +++++++++++++-------
 1 file changed, 46 insertions(+), 24 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index 452f2b2612c6..0649b47703a9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -804,44 +804,28 @@ void mlx5_eq_update_ci(struct mlx5_eq *eq, u32 cc, bool arm)
 }
 EXPORT_SYMBOL(mlx5_eq_update_ci);
 
-static void comp_irqs_release(struct mlx5_core_dev *dev)
+static void comp_irqs_release_pci(struct mlx5_core_dev *dev)
 {
 	struct mlx5_eq_table *table = dev->priv.eq_table;
 
-	if (mlx5_core_is_sf(dev))
-		mlx5_irq_affinity_irqs_release(dev, table->comp_irqs, table->num_comp_eqs);
-	else
-		mlx5_irqs_release_vectors(table->comp_irqs, table->num_comp_eqs);
-	kfree(table->comp_irqs);
+	mlx5_irqs_release_vectors(table->comp_irqs, table->num_comp_eqs);
 }
 
-static int comp_irqs_request(struct mlx5_core_dev *dev)
+static int comp_irqs_request_pci(struct mlx5_core_dev *dev)
 {
 	struct mlx5_eq_table *table = dev->priv.eq_table;
 	const struct cpumask *prev = cpu_none_mask;
 	const struct cpumask *mask;
-	int ncomp_eqs = table->num_comp_eqs;
+	int ncomp_eqs;
 	u16 *cpus;
 	int ret;
 	int cpu;
 	int i;
 
 	ncomp_eqs = table->num_comp_eqs;
-	table->comp_irqs = kcalloc(ncomp_eqs, sizeof(*table->comp_irqs), GFP_KERNEL);
-	if (!table->comp_irqs)
-		return -ENOMEM;
-	if (mlx5_core_is_sf(dev)) {
-		ret = mlx5_irq_affinity_irqs_request_auto(dev, ncomp_eqs, table->comp_irqs);
-		if (ret < 0)
-			goto free_irqs;
-		return ret;
-	}
-
 	cpus = kcalloc(ncomp_eqs, sizeof(*cpus), GFP_KERNEL);
-	if (!cpus) {
+	if (!cpus)
 		ret = -ENOMEM;
-		goto free_irqs;
-	}
 
 	i = 0;
 	rcu_read_lock();
@@ -857,12 +841,50 @@ static int comp_irqs_request(struct mlx5_core_dev *dev)
 	rcu_read_unlock();
 	ret = mlx5_irqs_request_vectors(dev, cpus, ncomp_eqs, table->comp_irqs);
 	kfree(cpus);
-	if (ret < 0)
-		goto free_irqs;
 	return ret;
+}
+
+static void comp_irqs_release_sf(struct mlx5_core_dev *dev)
+{
+	struct mlx5_eq_table *table = dev->priv.eq_table;
+
+	mlx5_irq_affinity_irqs_release(dev, table->comp_irqs, table->num_comp_eqs);
+}
+
+static int comp_irqs_request_sf(struct mlx5_core_dev *dev)
+{
+	struct mlx5_eq_table *table = dev->priv.eq_table;
+	int ncomp_eqs = table->num_comp_eqs;
+
+	return mlx5_irq_affinity_irqs_request_auto(dev, ncomp_eqs, table->comp_irqs);
+}
+
+static void comp_irqs_release(struct mlx5_core_dev *dev)
+{
+	struct mlx5_eq_table *table = dev->priv.eq_table;
+
+	mlx5_core_is_sf(dev) ? comp_irqs_release_sf(dev) :
+			       comp_irqs_release_pci(dev);
 
-free_irqs:
 	kfree(table->comp_irqs);
+}
+
+static int comp_irqs_request(struct mlx5_core_dev *dev)
+{
+	struct mlx5_eq_table *table = dev->priv.eq_table;
+	int ncomp_eqs;
+	int ret;
+
+	ncomp_eqs = table->num_comp_eqs;
+	table->comp_irqs = kcalloc(ncomp_eqs, sizeof(*table->comp_irqs), GFP_KERNEL);
+	if (!table->comp_irqs)
+		return -ENOMEM;
+
+	ret = mlx5_core_is_sf(dev) ? comp_irqs_request_sf(dev) :
+				     comp_irqs_request_pci(dev);
+	if (ret < 0)
+		kfree(table->comp_irqs);
+
 	return ret;
 }
 
-- 
2.39.1