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Actually add IOMMU domain to the list of known mappings. This fixes a bug

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where multiple devices in the same IOMMU domain would be allocated
conflicting mappings unless they also shared a DMA tag.

MFC after:	3 days
This commit is contained in:
Nathan Whitehorn 2013-11-12 16:14:45 +00:00
parent ea5d5118ae
commit acf9bb339a
1 changed files with 3 additions and 0 deletions
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3
sys/powerpc/pseries/plpar_iommu.c
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@ -115,6 +115,8 @@ phyp_iommu_set_dma_tag(device_t bus, device_t dev, bus_dma_tag_t tag)
(((uint64_t)(dmawindow[dma_acells + 1]) << 32) |
dmawindow[dma_acells + 2]);
if (bootverbose)
device_printf(dev, "Mapping IOMMU domain %#x\n", dmawindow[0]);
window->map = NULL;
SLIST_FOREACH(i, &iommu_map_head, entries) {
if (i->iobn == dmawindow[0]) {
@ -134,6 +136,7 @@ phyp_iommu_set_dma_tag(device_t bus, device_t dev, bus_dma_tag_t tag)
window->map->vmem = vmem_create("IOMMU mappings", PAGE_SIZE,
trunc_page(VMEM_ADDR_MAX) - PAGE_SIZE, PAGE_SIZE, 0,
M_BESTFIT | M_NOWAIT);
SLIST_INSERT_HEAD(&iommu_map_head, window->map, entries);
}
/*