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Differential D35995 Diff 108720 sys/dev/iommu/busdma_iommu.c

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sys/dev/iommu/busdma_iommu.c

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entry = iommu_gas_alloc_entry(domain, waitok ? 0 : IOMMU_PGF_WAITOK); entry = iommu_gas_alloc_entry(domain, waitok ? 0 : IOMMU_PGF_WAITOK);
if (entry == NULL) if (entry == NULL)
return (ENOMEM); return (ENOMEM);
entry->start = start; entry->start = start;
entry->end = start + length; entry->end = start + length;
ma = malloc(sizeof(vm_page_t) * atop(length), M_TEMP, waitok ? ma = malloc(sizeof(vm_page_t) * atop(length), M_TEMP, waitok ?
M_WAITOK : M_NOWAIT); M_WAITOK : M_NOWAIT);
if (ma == NULL) { if (ma == NULL) {
iommu_gas_free_entry(domain, entry); iommu_gas_free_entry(entry);
return (ENOMEM); return (ENOMEM);
} }
for (i = 0; i < atop(length); i++) { for (i = 0; i < atop(length); i++) {
ma[i] = vm_page_getfake(entry->start + PAGE_SIZE * i, ma[i] = vm_page_getfake(entry->start + PAGE_SIZE * i,
VM_MEMATTR_DEFAULT); VM_MEMATTR_DEFAULT);
} }
error = iommu_gas_map_region(domain, entry, IOMMU_MAP_ENTRY_READ | error = iommu_gas_map_region(domain, entry, IOMMU_MAP_ENTRY_READ |
((flags & BUS_DMA_NOWRITE) ? 0 : IOMMU_MAP_ENTRY_WRITE) | ((flags & BUS_DMA_NOWRITE) ? 0 : IOMMU_MAP_ENTRY_WRITE) |
IOMMU_MAP_ENTRY_MAP, waitok ? IOMMU_MF_CANWAIT : 0, ma); IOMMU_MAP_ENTRY_MAP, waitok ? IOMMU_MF_CANWAIT : 0, ma);
if (error == 0) { if (error == 0) {
IOMMU_DMAMAP_LOCK(map); IOMMU_DMAMAP_LOCK(map);
TAILQ_INSERT_TAIL(&map->map_entries, entry, dmamap_link); TAILQ_INSERT_TAIL(&map->map_entries, entry, dmamap_link);
IOMMU_DMAMAP_UNLOCK(map); IOMMU_DMAMAP_UNLOCK(map);
} else { } else {
iommu_gas_free_entry(domain, entry); iommu_gas_free_entry(entry);
} }
for (i = 0; i < atop(length); i++) for (i = 0; i < atop(length); i++)
vm_page_putfake(ma[i]); vm_page_putfake(ma[i]);
free(ma, M_TEMP); free(ma, M_TEMP);
return (error); return (error);
} }
static void static void
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