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net/mlx5: Introduce mlx5_cpumask_default_spread

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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: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Maher Sanalla 2023-06-12 11:50:10 +03:00 committed by Saeed Mahameed
parent e3e56775e9
commit ddd2c79da0
1 changed files with 14 additions and 6 deletions
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20
drivers/net/ethernet/mellanox/mlx5/core/eq.c
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@ -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);