Esempi in C++ (Cpp) per pci_irq_get_affinity

Esempio n. 1

File: blk-mq-pci.c Progetto: 01org/thunderbolt-software-kernel-tree

/**
 * blk_mq_pci_map_queues - provide a default queue mapping for PCI device
 * @set:	tagset to provide the mapping for
 * @pdev:	PCI device associated with @set.
 *
 * This function assumes the PCI device @pdev has at least as many available
 * interrupt vectors as @set has queues.  It will then query the vector
 * corresponding to each queue for it's affinity mask and built queue mapping
 * that maps a queue to the CPUs that have irq affinity for the corresponding
 * vector.
 */
int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev)
{
	const struct cpumask *mask;
	unsigned int queue, cpu;

	for (queue = 0; queue < set->nr_hw_queues; queue++) {
		mask = pci_irq_get_affinity(pdev, queue);
		if (!mask)
			return -EINVAL;

		for_each_cpu(cpu, mask)
			set->mq_map[cpu] = queue;
	}

	return 0;
}

Esempio n. 2

File: blk-mq-pci.c Progetto: Camedpuffer/linux

/**
 * blk_mq_pci_map_queues - provide a default queue mapping for PCI device
 * @set:	tagset to provide the mapping for
 * @pdev:	PCI device associated with @set.
 *
 * This function assumes the PCI device @pdev has at least as many available
 * interrupt vectors as @set has queues.  It will then query the vector
 * corresponding to each queue for it's affinity mask and built queue mapping
 * that maps a queue to the CPUs that have irq affinity for the corresponding
 * vector.
 */
int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev)
{
	const struct cpumask *mask;
	unsigned int queue, cpu;

	for (queue = 0; queue < set->nr_hw_queues; queue++) {
		mask = pci_irq_get_affinity(pdev, queue);
		if (!mask)
			goto fallback;

		for_each_cpu(cpu, mask)
			set->mq_map[cpu] = queue;
	}

	return 0;

fallback:
	WARN_ON_ONCE(set->nr_hw_queues > 1);
	for_each_possible_cpu(cpu)
		set->mq_map[cpu] = 0;
	return 0;
}