dev/mthca/mthca_memfree.c

446 		      struct mthca_user_db_table *db_tab, int index, u64 uaddr)
458 	mutex_lock(&db_tab->mutex);
462 	if ((db_tab->page[i].refcount >= MTHCA_DB_REC_PER_PAGE)       ||
463 	    (db_tab->page[i].uvirt && db_tab->page[i].uvirt != uaddr) ||
469 	if (db_tab->page[i].refcount) {
470 		++db_tab->page[i].refcount;
478 	sg_set_page(&db_tab->page[i].mem, pages[0], MTHCA_ICM_PAGE_SIZE,
481 	ret = pci_map_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
487 	ret = mthca_MAP_ICM_page(dev, sg_dma_address(&db_tab->page[i].mem),
490 		pci_unmap_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
491 		put_page(sg_page(&db_tab->page[i].mem));
495 	db_tab->page[i].uvirt    = uaddr;
496 	db_tab->page[i].refcount = 1;
499 	mutex_unlock(&db_tab->mutex);
504 			 struct mthca_user_db_table *db_tab, int index)
514 	mutex_lock(&db_tab->mutex);
516 	--db_tab->page[index / MTHCA_DB_REC_PER_PAGE].refcount;
518 	mutex_unlock(&db_tab->mutex);
523 	struct mthca_user_db_table *db_tab;
531 	db_tab = kmalloc(sizeof *db_tab + npages * sizeof *db_tab->page, GFP_KERNEL);
532 	if (!db_tab)
535 	mutex_init(&db_tab->mutex);
537 		db_tab->page[i].refcount = 0;
538 		db_tab->page[i].uvirt    = 0;
539 		sg_init_table(&db_tab->page[i].mem, 1);
542 	return db_tab;
546 			       struct mthca_user_db_table *db_tab)
554 		if (db_tab->page[i].uvirt) {
556 			pci_unmap_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
557 			put_page(sg_page(&db_tab->page[i].mem));
561 	kfree(db_tab);
573 	mutex_lock(&dev->db_tab->mutex);
580 		end   = dev->db_tab->max_group1;
588 		start = dev->db_tab->npages - 1;
589 		end   = dev->db_tab->min_group2;
599 		if (dev->db_tab->page[i].db_rec &&
600 		    !bitmap_full(dev->db_tab->page[i].used,
602 			page = dev->db_tab->page + i;
607 		if (!dev->db_tab->page[i].db_rec) {
608 			page = dev->db_tab->page + i;
612 	if (dev->db_tab->max_group1 >= dev->db_tab->min_group2 - 1) {
618 		++dev->db_tab->max_group1;
620 		--dev->db_tab->min_group2;
622 	page = dev->db_tab->page + end;
657 	mutex_unlock(&dev->db_tab->mutex);
670 	page = dev->db_tab->page + i;
672 	mutex_lock(&dev->db_tab->mutex);
675 	if (i >= dev->db_tab->min_group2)
680 	    i >= dev->db_tab->max_group1 - 1) {
687 		if (i == dev->db_tab->max_group1) {
688 			--dev->db_tab->max_group1;
691 		if (i == dev->db_tab->min_group2)
692 			++dev->db_tab->min_group2;
695 	mutex_unlock(&dev->db_tab->mutex);
705 	dev->db_tab = kmalloc(sizeof *dev->db_tab, GFP_KERNEL);
706 	if (!dev->db_tab)
709 	mutex_init(&dev->db_tab->mutex);
711 	dev->db_tab->npages     = dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE;
712 	dev->db_tab->max_group1 = 0;
713 	dev->db_tab->min_group2 = dev->db_tab->npages - 1;
715 	dev->db_tab->page = kmalloc(dev->db_tab->npages *
716 				    sizeof *dev->db_tab->page,
718 	if (!dev->db_tab->page) {
719 		kfree(dev->db_tab);
723 	for (i = 0; i < dev->db_tab->npages; ++i)
724 		dev->db_tab->page[i].db_rec = NULL;
742 	for (i = 0; i < dev->db_tab->npages; ++i) {
743 		if (!dev->db_tab->page[i].db_rec)
746 		if (!bitmap_empty(dev->db_tab->page[i].used, MTHCA_DB_REC_PER_PAGE))
752 				  dev->db_tab->page[i].db_rec,
753 				  dev->db_tab->page[i].mapping);
756 	kfree(dev->db_tab->page);
757 	kfree(dev->db_tab);