Commit ddd2c79d authored by Maher Sanalla's avatar Maher Sanalla Committed by Saeed Mahameed
Browse files

net/mlx5: Introduce mlx5_cpumask_default_spread 



For better code readability in the completion IRQ request code, define
the cpu lookup per completion vector logic in a separate function.

The new method mlx5_cpumask_default_spread() given a vector index 'n'
will return the 'nth' cpu. This new method will be used also in the next
patch.

Signed-off-by: default avatarMaher Sanalla <msanalla@nvidia.com>
Reviewed-by: default avatarShay Drory <shayd@nvidia.com>
Reviewed-by: default avatarMoshe Shemesh <moshe@nvidia.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@nvidia.com>
parent e3e56775

drivers/net/ethernet/mellanox/mlx5/core/eq.c

+14 −6
Original line number Diff line number Diff line
@@ -826,20 +826,18 @@ static void comp_irq_release_pci(struct mlx5_core_dev *dev, u16 vecidx) 
	mlx5_irq_release_vector(irq);

}



static int comp_irq_request_pci(struct mlx5_core_dev *dev, u16 vecidx)

static int mlx5_cpumask_default_spread(int numa_node, int index)

{

	struct mlx5_eq_table *table = dev->priv.eq_table;

	const struct cpumask *prev = cpu_none_mask;

	const struct cpumask *mask;

	struct mlx5_irq *irq;

	int found_cpu = 0;

	int i = 0;

	int cpu;



	rcu_read_lock();

	for_each_numa_hop_mask(mask, dev->priv.numa_node) {

	for_each_numa_hop_mask(mask, numa_node) {

		for_each_cpu_andnot(cpu, mask, prev) {

			if (i++ == vecidx) {

			if (i++ == index) {

				found_cpu = cpu;

				goto spread_done;

			}
@@ -849,7 +847,17 @@ static int comp_irq_request_pci(struct mlx5_core_dev *dev, u16 vecidx) 


spread_done:

	rcu_read_unlock();

	irq = mlx5_irq_request_vector(dev, found_cpu, vecidx, &table->rmap);

	return found_cpu;

}



static int comp_irq_request_pci(struct mlx5_core_dev *dev, u16 vecidx)

{

	struct mlx5_eq_table *table = dev->priv.eq_table;

	struct mlx5_irq *irq;

	int cpu;



	cpu = mlx5_cpumask_default_spread(dev->priv.numa_node, vecidx);

	irq = mlx5_irq_request_vector(dev, cpu, vecidx, &table->rmap);

	if (IS_ERR(irq))

		return PTR_ERR(irq);