pci/msi/msi.c

23  * @nvec: how many MSIs have been requested?
29 static int pci_msi_supported(struct pci_dev *dev, int nvec)
43 	 *  b) the list manipulation code assumes nvec >= 1.
45 	if (nvec < 1)
282 static int msi_setup_msi_desc(struct pci_dev *dev, int nvec,
299 	desc.nvec_used			= nvec;
304 	desc.pci.msi_attrib.multiple	= ilog2(__roundup_pow_of_two(nvec));
339  * @nvec: number of interrupts to allocate
348 static int msi_capability_init(struct pci_dev *dev, int nvec,
356 	if (nvec > 1 && !pci_msi_domain_supports(dev, MSI_FLAG_MULTI_PCI_MSI, ALLOW_LEGACY))
367 		masks = irq_create_affinity_masks(nvec, affd);
370 	ret = msi_setup_msi_desc(dev, nvec, masks);
379 	ret = pci_msi_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
409 	int nvec;
427 	nvec = pci_msi_vec_count(dev);
428 	if (nvec < 0)
429 		return nvec;
430 	if (nvec < minvec)
433 	if (nvec > maxvec)
434 		nvec = maxvec;
445 			nvec = irq_calc_affinity_vectors(minvec, nvec, affd);
446 			if (nvec < minvec)
450 		rc = msi_capability_init(dev, nvec, affd);
452 			return nvec;
459 		nvec = rc;
610 				int nvec, struct irq_affinity_desc *masks)
618 	for (i = 0, curmsk = masks; i < nvec; i++, curmsk++) {
657 				 int nvec, struct irq_affinity *affd)
663 		masks = irq_create_affinity_masks(nvec, affd);
666 	ret = msix_setup_msi_descs(dev, entries, nvec, masks);
670 	ret = pci_msi_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
694  * @nvec: number of @entries
702 				int nvec, struct irq_affinity *affd)
727 	ret = msix_setup_interrupts(dev, entries, nvec, affd);
755 static bool pci_msix_validate_entries(struct pci_dev *dev, struct msix_entry *entries, int nvec)
765 	for (i = 0; i < nvec; i++) {
767 		for (j = i + 1; j < nvec; j++) {
781 	int hwsize, rc, nvec = maxvec;
798 	if (!pci_msi_supported(dev, nvec) || dev->current_state != PCI_D0)
805 	if (!pci_msix_validate_entries(dev, entries, nvec))
808 	if (hwsize < nvec) {
811 			hwsize = nvec;
813 			nvec = hwsize;
816 	if (nvec < minvec)
828 			nvec = irq_calc_affinity_vectors(minvec, nvec, affd);
829 			if (nvec < minvec)
833 		rc = msix_capability_init(dev, entries, nvec, affd);
835 			return nvec;
842 		nvec = rc;