int flags; /* flags to find out type of domain */
int iommu_coherency;/* indicate coherency of iommu access */
+ int iommu_count; /* reference count of iommu */
+ spinlock_t iommu_lock; /* protect iommu set in domain */
+ u64 max_addr; /* maximum mapped address */
};
/* PCI domain-device relationship */
}
}
+static struct intel_iommu *device_to_iommu(u8 bus, u8 devfn)
+{
+ struct dmar_drhd_unit *drhd = NULL;
+ int i;
+
+ for_each_drhd_unit(drhd) {
+ if (drhd->ignored)
+ continue;
+
+ for (i = 0; i < drhd->devices_cnt; i++)
+ if (drhd->devices[i]->bus->number == bus &&
+ drhd->devices[i]->devfn == devfn)
+ return drhd->iommu;
+
+ if (drhd->include_all)
+ return drhd->iommu;
+ }
+
+ return NULL;
+}
+
+static void domain_flush_cache(struct dmar_domain *domain,
+ void *addr, int size)
+{
+ if (!domain->iommu_coherency)
+ clflush_cache_range(addr, size);
+}
+
/* Gets context entry for a given bus and devfn */
static struct context_entry * device_to_context_entry(struct intel_iommu *iommu,
u8 bus, u8 devfn)
int level = agaw_to_level(domain->agaw);
int offset;
unsigned long flags;
- struct intel_iommu *iommu = domain_get_iommu(domain);
BUG_ON(!domain->pgd);
flags);
return NULL;
}
- __iommu_flush_cache(iommu, tmp_page,
- PAGE_SIZE);
+ domain_flush_cache(domain, tmp_page, PAGE_SIZE);
dma_set_pte_addr(pte, virt_to_phys(tmp_page));
/*
* high level table always sets r/w, last level page
*/
dma_set_pte_readable(pte);
dma_set_pte_writable(pte);
- __iommu_flush_cache(iommu, pte, sizeof(*pte));
+ domain_flush_cache(domain, pte, sizeof(*pte));
}
parent = phys_to_virt(dma_pte_addr(pte));
level--;
static void dma_pte_clear_one(struct dmar_domain *domain, u64 addr)
{
struct dma_pte *pte = NULL;
- struct intel_iommu *iommu = domain_get_iommu(domain);
/* get last level pte */
pte = dma_addr_level_pte(domain, addr, 1);
if (pte) {
dma_clear_pte(pte);
- __iommu_flush_cache(iommu, pte, sizeof(*pte));
+ domain_flush_cache(domain, pte, sizeof(*pte));
}
}
int total = agaw_to_level(domain->agaw);
int level;
u64 tmp;
- struct intel_iommu *iommu = domain_get_iommu(domain);
start &= (((u64)1) << addr_width) - 1;
end &= (((u64)1) << addr_width) - 1;
free_pgtable_page(
phys_to_virt(dma_pte_addr(pte)));
dma_clear_pte(pte);
- __iommu_flush_cache(iommu,
- pte, sizeof(*pte));
+ domain_flush_cache(domain, pte, sizeof(*pte));
}
tmp += level_size(level);
}
static void domain_exit(struct dmar_domain *domain);
+static void vm_domain_exit(struct dmar_domain *domain);
void free_dmar_iommu(struct intel_iommu *iommu)
{
struct dmar_domain *domain;
int i;
+ unsigned long flags;
i = find_first_bit(iommu->domain_ids, cap_ndoms(iommu->cap));
for (; i < cap_ndoms(iommu->cap); ) {
domain = iommu->domains[i];
clear_bit(i, iommu->domain_ids);
- domain_exit(domain);
+
+ spin_lock_irqsave(&domain->iommu_lock, flags);
+ if (--domain->iommu_count == 0) {
+ if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE)
+ vm_domain_exit(domain);
+ else
+ domain_exit(domain);
+ }
+ spin_unlock_irqrestore(&domain->iommu_lock, flags);
+
i = find_next_bit(iommu->domain_ids,
cap_ndoms(iommu->cap), i+1);
}
init_iova_domain(&domain->iovad, DMA_32BIT_PFN);
spin_lock_init(&domain->mapping_lock);
+ spin_lock_init(&domain->iommu_lock);
domain_reserve_special_ranges(domain);
else
domain->iommu_coherency = 0;
+ domain->iommu_count = 1;
+
/* always allocate the top pgd */
domain->pgd = (struct dma_pte *)alloc_pgtable_page();
if (!domain->pgd)
u8 bus, u8 devfn)
{
struct context_entry *context;
- struct intel_iommu *iommu = domain_get_iommu(domain);
unsigned long flags;
+ struct intel_iommu *iommu;
+ struct dma_pte *pgd;
+ unsigned long num;
+ unsigned long ndomains;
+ int id;
+ int agaw;
pr_debug("Set context mapping for %02x:%02x.%d\n",
bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
BUG_ON(!domain->pgd);
+
+ iommu = device_to_iommu(bus, devfn);
+ if (!iommu)
+ return -ENODEV;
+
context = device_to_context_entry(iommu, bus, devfn);
if (!context)
return -ENOMEM;
return 0;
}
- context_set_domain_id(context, domain->id);
- context_set_address_width(context, domain->agaw);
- context_set_address_root(context, virt_to_phys(domain->pgd));
+ id = domain->id;
+ pgd = domain->pgd;
+
+ if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) {
+ int found = 0;
+
+ /* find an available domain id for this device in iommu */
+ ndomains = cap_ndoms(iommu->cap);
+ num = find_first_bit(iommu->domain_ids, ndomains);
+ for (; num < ndomains; ) {
+ if (iommu->domains[num] == domain) {
+ id = num;
+ found = 1;
+ break;
+ }
+ num = find_next_bit(iommu->domain_ids,
+ cap_ndoms(iommu->cap), num+1);
+ }
+
+ if (found == 0) {
+ num = find_first_zero_bit(iommu->domain_ids, ndomains);
+ if (num >= ndomains) {
+ spin_unlock_irqrestore(&iommu->lock, flags);
+ printk(KERN_ERR "IOMMU: no free domain ids\n");
+ return -EFAULT;
+ }
+
+ set_bit(num, iommu->domain_ids);
+ iommu->domains[num] = domain;
+ id = num;
+ }
+
+ /* Skip top levels of page tables for
+ * iommu which has less agaw than default.
+ */
+ for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) {
+ pgd = phys_to_virt(dma_pte_addr(pgd));
+ if (!dma_pte_present(pgd)) {
+ spin_unlock_irqrestore(&iommu->lock, flags);
+ return -ENOMEM;
+ }
+ }
+ }
+
+ context_set_domain_id(context, id);
+ context_set_address_width(context, iommu->agaw);
+ context_set_address_root(context, virt_to_phys(pgd));
context_set_translation_type(context, CONTEXT_TT_MULTI_LEVEL);
context_set_fault_enable(context);
context_set_present(context);
- __iommu_flush_cache(iommu, context, sizeof(*context));
+ domain_flush_cache(domain, context, sizeof(*context));
/* it's a non-present to present mapping */
if (iommu->flush.flush_context(iommu, domain->id,
iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_DSI_FLUSH, 0);
spin_unlock_irqrestore(&iommu->lock, flags);
+
+ spin_lock_irqsave(&domain->iommu_lock, flags);
+ if (!test_and_set_bit(iommu->seq_id, &domain->iommu_bmp)) {
+ domain->iommu_count++;
+ domain_update_iommu_coherency(domain);
+ }
+ spin_unlock_irqrestore(&domain->iommu_lock, flags);
return 0;
}
tmp->bus->number, tmp->devfn);
}
-static int domain_context_mapped(struct dmar_domain *domain,
- struct pci_dev *pdev)
+static int domain_context_mapped(struct pci_dev *pdev)
{
int ret;
struct pci_dev *tmp, *parent;
- struct intel_iommu *iommu = domain_get_iommu(domain);
+ struct intel_iommu *iommu;
+
+ iommu = device_to_iommu(pdev->bus->number, pdev->devfn);
+ if (!iommu)
+ return -ENODEV;
ret = device_context_mapped(iommu,
pdev->bus->number, pdev->devfn);
struct dma_pte *pte;
int index;
int addr_width = agaw_to_width(domain->agaw);
- struct intel_iommu *iommu = domain_get_iommu(domain);
hpa &= (((u64)1) << addr_width) - 1;
BUG_ON(dma_pte_addr(pte));
dma_set_pte_addr(pte, start_pfn << VTD_PAGE_SHIFT);
dma_set_pte_prot(pte, prot);
- __iommu_flush_cache(iommu, pte, sizeof(*pte));
+ domain_flush_cache(domain, pte, sizeof(*pte));
start_pfn++;
index++;
}
return 0;
}
-static void detach_domain_for_dev(struct dmar_domain *domain, u8 bus, u8 devfn)
+static void iommu_detach_dev(struct intel_iommu *iommu, u8 bus, u8 devfn)
{
- struct intel_iommu *iommu = domain_get_iommu(domain);
+ if (!iommu)
+ return;
clear_context_table(iommu, bus, devfn);
iommu->flush.flush_context(iommu, 0, 0, 0,
{
struct device_domain_info *info;
unsigned long flags;
+ struct intel_iommu *iommu;
spin_lock_irqsave(&device_domain_lock, flags);
while (!list_empty(&domain->devices)) {
info->dev->dev.archdata.iommu = NULL;
spin_unlock_irqrestore(&device_domain_lock, flags);
- detach_domain_for_dev(info->domain, info->bus, info->devfn);
+ iommu = device_to_iommu(info->bus, info->devfn);
+ iommu_detach_dev(iommu, info->bus, info->devfn);
free_devinfo_mem(info);
spin_lock_irqsave(&device_domain_lock, flags);
}
/* make sure context mapping is ok */
- if (unlikely(!domain_context_mapped(domain, pdev))) {
+ if (unlikely(!domain_context_mapped(pdev))) {
ret = domain_context_mapping(domain, pdev);
if (ret) {
printk(KERN_ERR
return 0;
}
-void intel_iommu_domain_exit(struct dmar_domain *domain)
+static int vm_domain_add_dev_info(struct dmar_domain *domain,
+ struct pci_dev *pdev)
+{
+ struct device_domain_info *info;
+ unsigned long flags;
+
+ info = alloc_devinfo_mem();
+ if (!info)
+ return -ENOMEM;
+
+ info->bus = pdev->bus->number;
+ info->devfn = pdev->devfn;
+ info->dev = pdev;
+ info->domain = domain;
+
+ spin_lock_irqsave(&device_domain_lock, flags);
+ list_add(&info->link, &domain->devices);
+ list_add(&info->global, &device_domain_list);
+ pdev->dev.archdata.iommu = info;
+ spin_unlock_irqrestore(&device_domain_lock, flags);
+
+ return 0;
+}
+
+static void vm_domain_remove_one_dev_info(struct dmar_domain *domain,
+ struct pci_dev *pdev)
+{
+ struct device_domain_info *info;
+ struct intel_iommu *iommu;
+ unsigned long flags;
+ int found = 0;
+ struct list_head *entry, *tmp;
+
+ iommu = device_to_iommu(pdev->bus->number, pdev->devfn);
+ if (!iommu)
+ return;
+
+ spin_lock_irqsave(&device_domain_lock, flags);
+ list_for_each_safe(entry, tmp, &domain->devices) {
+ info = list_entry(entry, struct device_domain_info, link);
+ if (info->bus == pdev->bus->number &&
+ info->devfn == pdev->devfn) {
+ list_del(&info->link);
+ list_del(&info->global);
+ if (info->dev)
+ info->dev->dev.archdata.iommu = NULL;
+ spin_unlock_irqrestore(&device_domain_lock, flags);
+
+ iommu_detach_dev(iommu, info->bus, info->devfn);
+ free_devinfo_mem(info);
+
+ spin_lock_irqsave(&device_domain_lock, flags);
+
+ if (found)
+ break;
+ else
+ continue;
+ }
+
+ /* if there is no other devices under the same iommu
+ * owned by this domain, clear this iommu in iommu_bmp
+ * update iommu count and coherency
+ */
+ if (device_to_iommu(info->bus, info->devfn) == iommu)
+ found = 1;
+ }
+
+ if (found == 0) {
+ unsigned long tmp_flags;
+ spin_lock_irqsave(&domain->iommu_lock, tmp_flags);
+ clear_bit(iommu->seq_id, &domain->iommu_bmp);
+ domain->iommu_count--;
+ domain_update_iommu_coherency(domain);
+ spin_unlock_irqrestore(&domain->iommu_lock, tmp_flags);
+ }
+
+ spin_unlock_irqrestore(&device_domain_lock, flags);
+}
+
+static void vm_domain_remove_all_dev_info(struct dmar_domain *domain)
+{
+ struct device_domain_info *info;
+ struct intel_iommu *iommu;
+ unsigned long flags1, flags2;
+
+ spin_lock_irqsave(&device_domain_lock, flags1);
+ while (!list_empty(&domain->devices)) {
+ info = list_entry(domain->devices.next,
+ struct device_domain_info, link);
+ list_del(&info->link);
+ list_del(&info->global);
+ if (info->dev)
+ info->dev->dev.archdata.iommu = NULL;
+
+ spin_unlock_irqrestore(&device_domain_lock, flags1);
+
+ iommu = device_to_iommu(info->bus, info->devfn);
+ iommu_detach_dev(iommu, info->bus, info->devfn);
+
+ /* clear this iommu in iommu_bmp, update iommu count
+ * and coherency
+ */
+ spin_lock_irqsave(&domain->iommu_lock, flags2);
+ if (test_and_clear_bit(iommu->seq_id,
+ &domain->iommu_bmp)) {
+ domain->iommu_count--;
+ domain_update_iommu_coherency(domain);
+ }
+ spin_unlock_irqrestore(&domain->iommu_lock, flags2);
+
+ free_devinfo_mem(info);
+ spin_lock_irqsave(&device_domain_lock, flags1);
+ }
+ spin_unlock_irqrestore(&device_domain_lock, flags1);
+}
+
+/* domain id for virtual machine, it won't be set in context */
+static unsigned long vm_domid;
+
+static int vm_domain_min_agaw(struct dmar_domain *domain)
+{
+ int i;
+ int min_agaw = domain->agaw;
+
+ i = find_first_bit(&domain->iommu_bmp, g_num_of_iommus);
+ for (; i < g_num_of_iommus; ) {
+ if (min_agaw > g_iommus[i]->agaw)
+ min_agaw = g_iommus[i]->agaw;
+
+ i = find_next_bit(&domain->iommu_bmp, g_num_of_iommus, i+1);
+ }
+
+ return min_agaw;
+}
+
+static struct dmar_domain *iommu_alloc_vm_domain(void)
+{
+ struct dmar_domain *domain;
+
+ domain = alloc_domain_mem();
+ if (!domain)
+ return NULL;
+
+ domain->id = vm_domid++;
+ memset(&domain->iommu_bmp, 0, sizeof(unsigned long));
+ domain->flags = DOMAIN_FLAG_VIRTUAL_MACHINE;
+
+ return domain;
+}
+
+static int vm_domain_init(struct dmar_domain *domain, int guest_width)
+{
+ int adjust_width;
+
+ init_iova_domain(&domain->iovad, DMA_32BIT_PFN);
+ spin_lock_init(&domain->mapping_lock);
+ spin_lock_init(&domain->iommu_lock);
+
+ domain_reserve_special_ranges(domain);
+
+ /* calculate AGAW */
+ domain->gaw = guest_width;
+ adjust_width = guestwidth_to_adjustwidth(guest_width);
+ domain->agaw = width_to_agaw(adjust_width);
+
+ INIT_LIST_HEAD(&domain->devices);
+
+ domain->iommu_count = 0;
+ domain->iommu_coherency = 0;
+ domain->max_addr = 0;
+
+ /* always allocate the top pgd */
+ domain->pgd = (struct dma_pte *)alloc_pgtable_page();
+ if (!domain->pgd)
+ return -ENOMEM;
+ domain_flush_cache(domain, domain->pgd, PAGE_SIZE);
+ return 0;
+}
+
+static void iommu_free_vm_domain(struct dmar_domain *domain)
+{
+ unsigned long flags;
+ struct dmar_drhd_unit *drhd;
+ struct intel_iommu *iommu;
+ unsigned long i;
+ unsigned long ndomains;
+
+ for_each_drhd_unit(drhd) {
+ if (drhd->ignored)
+ continue;
+ iommu = drhd->iommu;
+
+ ndomains = cap_ndoms(iommu->cap);
+ i = find_first_bit(iommu->domain_ids, ndomains);
+ for (; i < ndomains; ) {
+ if (iommu->domains[i] == domain) {
+ spin_lock_irqsave(&iommu->lock, flags);
+ clear_bit(i, iommu->domain_ids);
+ iommu->domains[i] = NULL;
+ spin_unlock_irqrestore(&iommu->lock, flags);
+ break;
+ }
+ i = find_next_bit(iommu->domain_ids, ndomains, i+1);
+ }
+ }
+}
+
+static void vm_domain_exit(struct dmar_domain *domain)
{
u64 end;
if (!domain)
return;
+ vm_domain_remove_all_dev_info(domain);
+ /* destroy iovas */
+ put_iova_domain(&domain->iovad);
end = DOMAIN_MAX_ADDR(domain->gaw);
end = end & (~VTD_PAGE_MASK);
/* free page tables */
dma_pte_free_pagetable(domain, 0, end);
- iommu_free_domain(domain);
+ iommu_free_vm_domain(domain);
free_domain_mem(domain);
}
-EXPORT_SYMBOL_GPL(intel_iommu_domain_exit);
-struct dmar_domain *intel_iommu_domain_alloc(struct pci_dev *pdev)
+struct dmar_domain *intel_iommu_alloc_domain(void)
{
- struct dmar_drhd_unit *drhd;
struct dmar_domain *domain;
- struct intel_iommu *iommu;
- drhd = dmar_find_matched_drhd_unit(pdev);
- if (!drhd) {
- printk(KERN_ERR "intel_iommu_domain_alloc: drhd == NULL\n");
- return NULL;
- }
-
- iommu = drhd->iommu;
- if (!iommu) {
- printk(KERN_ERR
- "intel_iommu_domain_alloc: iommu == NULL\n");
- return NULL;
- }
- domain = iommu_alloc_domain(iommu);
+ domain = iommu_alloc_vm_domain();
if (!domain) {
printk(KERN_ERR
"intel_iommu_domain_alloc: domain == NULL\n");
return NULL;
}
- if (domain_init(domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
+ if (vm_domain_init(domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
printk(KERN_ERR
"intel_iommu_domain_alloc: domain_init() failed\n");
- intel_iommu_domain_exit(domain);
+ vm_domain_exit(domain);
return NULL;
}
+
return domain;
}
-EXPORT_SYMBOL_GPL(intel_iommu_domain_alloc);
+EXPORT_SYMBOL_GPL(intel_iommu_alloc_domain);
-int intel_iommu_context_mapping(
- struct dmar_domain *domain, struct pci_dev *pdev)
+void intel_iommu_free_domain(struct dmar_domain *domain)
{
- int rc;
- rc = domain_context_mapping(domain, pdev);
- return rc;
+ vm_domain_exit(domain);
}
-EXPORT_SYMBOL_GPL(intel_iommu_context_mapping);
+EXPORT_SYMBOL_GPL(intel_iommu_free_domain);
-int intel_iommu_page_mapping(
- struct dmar_domain *domain, dma_addr_t iova,
- u64 hpa, size_t size, int prot)
+int intel_iommu_attach_device(struct dmar_domain *domain,
+ struct pci_dev *pdev)
{
- int rc;
- rc = domain_page_mapping(domain, iova, hpa, size, prot);
- return rc;
+ struct intel_iommu *iommu;
+ int addr_width;
+ u64 end;
+ int ret;
+
+ /* normally pdev is not mapped */
+ if (unlikely(domain_context_mapped(pdev))) {
+ struct dmar_domain *old_domain;
+
+ old_domain = find_domain(pdev);
+ if (old_domain) {
+ if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE)
+ vm_domain_remove_one_dev_info(old_domain, pdev);
+ else
+ domain_remove_dev_info(old_domain);
+ }
+ }
+
+ iommu = device_to_iommu(pdev->bus->number, pdev->devfn);
+ if (!iommu)
+ return -ENODEV;
+
+ /* check if this iommu agaw is sufficient for max mapped address */
+ addr_width = agaw_to_width(iommu->agaw);
+ end = DOMAIN_MAX_ADDR(addr_width);
+ end = end & VTD_PAGE_MASK;
+ if (end < domain->max_addr) {
+ printk(KERN_ERR "%s: iommu agaw (%d) is not "
+ "sufficient for the mapped address (%llx)\n",
+ __func__, iommu->agaw, domain->max_addr);
+ return -EFAULT;
+ }
+
+ ret = domain_context_mapping(domain, pdev);
+ if (ret)
+ return ret;
+
+ ret = vm_domain_add_dev_info(domain, pdev);
+ return ret;
}
-EXPORT_SYMBOL_GPL(intel_iommu_page_mapping);
+EXPORT_SYMBOL_GPL(intel_iommu_attach_device);
-void intel_iommu_detach_dev(struct dmar_domain *domain, u8 bus, u8 devfn)
+void intel_iommu_detach_device(struct dmar_domain *domain,
+ struct pci_dev *pdev)
{
- detach_domain_for_dev(domain, bus, devfn);
+ vm_domain_remove_one_dev_info(domain, pdev);
}
-EXPORT_SYMBOL_GPL(intel_iommu_detach_dev);
+EXPORT_SYMBOL_GPL(intel_iommu_detach_device);
-struct dmar_domain *
-intel_iommu_find_domain(struct pci_dev *pdev)
+int intel_iommu_map_address(struct dmar_domain *domain, dma_addr_t iova,
+ u64 hpa, size_t size, int prot)
{
- return find_domain(pdev);
+ u64 max_addr;
+ int addr_width;
+ int ret;
+
+ max_addr = (iova & VTD_PAGE_MASK) + VTD_PAGE_ALIGN(size);
+ if (domain->max_addr < max_addr) {
+ int min_agaw;
+ u64 end;
+
+ /* check if minimum agaw is sufficient for mapped address */
+ min_agaw = vm_domain_min_agaw(domain);
+ addr_width = agaw_to_width(min_agaw);
+ end = DOMAIN_MAX_ADDR(addr_width);
+ end = end & VTD_PAGE_MASK;
+ if (end < max_addr) {
+ printk(KERN_ERR "%s: iommu agaw (%d) is not "
+ "sufficient for the mapped address (%llx)\n",
+ __func__, min_agaw, max_addr);
+ return -EFAULT;
+ }
+ domain->max_addr = max_addr;
+ }
+
+ ret = domain_page_mapping(domain, iova, hpa, size, prot);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(intel_iommu_map_address);
+
+void intel_iommu_unmap_address(struct dmar_domain *domain,
+ dma_addr_t iova, size_t size)
+{
+ dma_addr_t base;
+
+ /* The address might not be aligned */
+ base = iova & VTD_PAGE_MASK;
+ size = VTD_PAGE_ALIGN(size);
+ dma_pte_clear_range(domain, base, base + size);
+
+ if (domain->max_addr == base + size)
+ domain->max_addr = base;
}
-EXPORT_SYMBOL_GPL(intel_iommu_find_domain);
+EXPORT_SYMBOL_GPL(intel_iommu_unmap_address);
int intel_iommu_found(void)
{
}
EXPORT_SYMBOL_GPL(intel_iommu_found);
-u64 intel_iommu_iova_to_pfn(struct dmar_domain *domain, u64 iova)
+u64 intel_iommu_iova_to_phys(struct dmar_domain *domain, u64 iova)
{
struct dma_pte *pte;
- u64 pfn;
+ u64 phys = 0;
- pfn = 0;
pte = addr_to_dma_pte(domain, iova);
-
if (pte)
- pfn = dma_pte_addr(pte);
+ phys = dma_pte_addr(pte);
- return pfn >> VTD_PAGE_SHIFT;
+ return phys;
}
-EXPORT_SYMBOL_GPL(intel_iommu_iova_to_pfn);
+EXPORT_SYMBOL_GPL(intel_iommu_iova_to_phys);
projects / deliverable / linux.git / blobdiff