memcpy(dmaru->hdr, header, header->length);
dmaru->reg_base_addr = drhd->address;
dmaru->segment = drhd->segment;
+ /* The size of the register set is 2 ^ N 4 KB pages. */
+ dmaru->reg_size = 1UL << (drhd->size + 12);
dmaru->include_all = drhd->flags & 0x1; /* BIT0: INCLUDE_ALL */
dmaru->devices = dmar_alloc_dev_scope((void *)(drhd + 1),
((void *)drhd) + drhd->header.length,
/**
* map_iommu: map the iommu's registers
* @iommu: the iommu to map
- * @phys_addr: the physical address of the base resgister
+ * @drhd: DMA remapping hardware definition structure
*
* Memory map the iommu's registers. Start w/ a single page, and
* possibly expand if that turns out to be insufficent.
*/
-static int map_iommu(struct intel_iommu *iommu, u64 phys_addr)
+static int map_iommu(struct intel_iommu *iommu, struct dmar_drhd_unit *drhd)
{
+ u64 phys_addr = drhd->reg_base_addr;
int map_size, err=0;
iommu->reg_phys = phys_addr;
- iommu->reg_size = VTD_PAGE_SIZE;
+ iommu->reg_size = drhd->reg_size;
if (!request_mem_region(iommu->reg_phys, iommu->reg_size, iommu->name)) {
pr_err("Can't reserve memory\n");
}
sprintf(iommu->name, "dmar%d", iommu->seq_id);
- err = map_iommu(iommu, drhd->reg_base_addr);
+ err = map_iommu(iommu, drhd);
if (err) {
pr_err("Failed to map %s\n", iommu->name);
goto error_free_seq_id;
struct list_head list; /* list of drhd units */
struct acpi_dmar_header *hdr; /* ACPI header */
u64 reg_base_addr; /* register base address*/
+ unsigned long reg_size; /* size of register set */
struct dmar_dev_scope *devices;/* target device array */
int devices_cnt; /* target device count */
u16 segment; /* PCI domain */