iommu/virtio: Make use of ops->iotlb_sync_map
Pull out the sync operation from viommu_map_pages() by implementing ops->iotlb_sync_map. This allows the common IOMMU code to map multiple elements of an sg with a single sync (see iommu_map_sg()). Link: https://lore.kernel.org/lkml/20230726111433.1105665-1-schnelle@linux.ibm.com/ Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Link: https://lore.kernel.org/r/20231120-viommu-sync-map-v3-1-50a57ecf78b5@linux.ibm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
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@ -843,7 +843,7 @@ static int viommu_map_pages(struct iommu_domain *domain, unsigned long iova,
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.flags = cpu_to_le32(flags),
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};
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ret = viommu_send_req_sync(vdomain->viommu, &map, sizeof(map));
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ret = viommu_add_req(vdomain->viommu, &map, sizeof(map));
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if (ret) {
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viommu_del_mappings(vdomain, iova, end);
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return ret;
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@ -912,6 +912,20 @@ static void viommu_iotlb_sync(struct iommu_domain *domain,
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viommu_sync_req(vdomain->viommu);
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}
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static int viommu_iotlb_sync_map(struct iommu_domain *domain,
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unsigned long iova, size_t size)
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{
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struct viommu_domain *vdomain = to_viommu_domain(domain);
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/*
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* May be called before the viommu is initialized including
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* while creating direct mapping
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*/
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if (!vdomain->nr_endpoints)
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return 0;
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return viommu_sync_req(vdomain->viommu);
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}
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static void viommu_get_resv_regions(struct device *dev, struct list_head *head)
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{
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struct iommu_resv_region *entry, *new_entry, *msi = NULL;
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@ -1058,6 +1072,7 @@ static struct iommu_ops viommu_ops = {
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.unmap_pages = viommu_unmap_pages,
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.iova_to_phys = viommu_iova_to_phys,
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.iotlb_sync = viommu_iotlb_sync,
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.iotlb_sync_map = viommu_iotlb_sync_map,
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.free = viommu_domain_free,
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}
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};
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