72  * A opencapi link can be used be by several PCI functions. We have
73  * one link per device slot.
79 struct link {  struct
182 	struct link *link = (struct link *) data;  in xsl_fault_handler()  local
183 	struct spa *spa = link->spa;  in xsl_fault_handler()
259 static int setup_xsl_irq(struct pci_dev *dev, struct link *link)  in setup_xsl_irq()  argument
261 	struct spa *spa = link->spa;  in setup_xsl_irq()
274 				link->domain, link->bus, link->dev);  in setup_xsl_irq()
282 	 * number of interrupts. Could we have an IRQ domain per link?  in setup_xsl_irq()
296 			link);  in setup_xsl_irq()
309 static void release_xsl_irq(struct link *link)  in release_xsl_irq()  argument
311 	struct spa *spa = link->spa;  in release_xsl_irq()
314 		free_irq(spa->virq, link);  in release_xsl_irq()
321 static int alloc_spa(struct pci_dev *dev, struct link *link)  in alloc_spa()  argument
341 	pr_debug("Allocated SPA for %x:%x:%x at %p\n", link->domain, link->bus,  in alloc_spa()
342 		link->dev, spa->spa_mem);  in alloc_spa()
344 	link->spa = spa;  in alloc_spa()
348 static void free_spa(struct link *link)  in free_spa()  argument
350 	struct spa *spa = link->spa;  in free_spa()
352 	pr_debug("Freeing SPA for %x:%x:%x\n", link->domain, link->bus,  in free_spa()
353 		link->dev);  in free_spa()
358 		link->spa = NULL;  in free_spa()
362 static int alloc_link(struct pci_dev *dev, int PE_mask, struct link **out_link)  in alloc_link()
364 	struct link *link;  in alloc_link()  local
367 	link = kzalloc(sizeof(struct link), GFP_KERNEL);  in alloc_link()
368 	if (!link)  in alloc_link()
371 	kref_init(&link->ref);  in alloc_link()
372 	link->domain = pci_domain_nr(dev->bus);  in alloc_link()
373 	link->bus = dev->bus->number;  in alloc_link()
374 	link->dev = PCI_SLOT(dev->devfn);  in alloc_link()
375 	atomic_set(&link->irq_available, MAX_IRQ_PER_LINK);  in alloc_link()
377 	rc = alloc_spa(dev, link);  in alloc_link()
381 	rc = setup_xsl_irq(dev, link);  in alloc_link()
386 	rc = pnv_ocxl_spa_setup(dev, link->spa->spa_mem, PE_mask,  in alloc_link()
387 				&link->platform_data);  in alloc_link()
391 	*out_link = link;  in alloc_link()
395 	release_xsl_irq(link);  in alloc_link()
397 	free_spa(link);  in alloc_link()
399 	kfree(link);  in alloc_link()
403 static void free_link(struct link *link)  in free_link()  argument
405 	release_xsl_irq(link);  in free_link()
406 	free_spa(link);  in free_link()
407 	kfree(link);  in free_link()
413 	struct link *link;  in ocxl_link_setup()  local
416 	list_for_each_entry(link, &links_list, list) {  in ocxl_link_setup()
417 		/* The functions of a device all share the same link */  in ocxl_link_setup()
418 		if (link->domain == pci_domain_nr(dev->bus) &&  in ocxl_link_setup()
419 			link->bus == dev->bus->number &&  in ocxl_link_setup()
420 			link->dev == PCI_SLOT(dev->devfn)) {  in ocxl_link_setup()
421 			kref_get(&link->ref);  in ocxl_link_setup()
422 			*link_handle = link;  in ocxl_link_setup()
426 	rc = alloc_link(dev, PE_mask, &link);  in ocxl_link_setup()
430 	list_add(&link->list, &links_list);  in ocxl_link_setup()
431 	*link_handle = link;  in ocxl_link_setup()
440 	struct link *link = container_of(ref, struct link, ref);  in release_xsl()  local
442 	list_del(&link->list);  in release_xsl()
444 	pnv_ocxl_spa_release(link->platform_data);  in release_xsl()
445 	free_link(link);  in release_xsl()
450 	struct link *link = (struct link *) link_handle;  in ocxl_link_release()  local
453 	kref_put(&link->ref, release_xsl);  in ocxl_link_release()
486 	struct link *link = (struct link *) link_handle;  in ocxl_link_add_pe()  local
487 	struct spa *spa = link->spa;  in ocxl_link_add_pe()
556 	struct link *link = (struct link *) link_handle;  in ocxl_link_update_pe()  local
557 	struct spa *spa = link->spa;  in ocxl_link_update_pe()
583 	rc = pnv_ocxl_spa_remove_pe_from_cache(link->platform_data, pe_handle);  in ocxl_link_update_pe()
592 	struct link *link = (struct link *) link_handle;  in ocxl_link_remove_pe()  local
593 	struct spa *spa = link->spa;  in ocxl_link_remove_pe()
645 	rc = pnv_ocxl_spa_remove_pe_from_cache(link->platform_data, pe_handle);  in ocxl_link_remove_pe()
664 	struct link *link = (struct link *) link_handle;  in ocxl_link_irq_alloc()  local
668 	if (atomic_dec_if_positive(&link->irq_available) < 0)  in ocxl_link_irq_alloc()
673 		atomic_inc(&link->irq_available);  in ocxl_link_irq_alloc()
685 	struct link *link = (struct link *) link_handle;  in ocxl_link_free_irq()  local
688 	atomic_inc(&link->irq_available);  in ocxl_link_free_irq()