2 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <jroedel@suse.de>
4 * Leo Duran <leo.duran@amd.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/ratelimit.h>
21 #include <linux/pci.h>
22 #include <linux/acpi.h>
23 #include <linux/amba/bus.h>
24 #include <linux/platform_device.h>
25 #include <linux/pci-ats.h>
26 #include <linux/bitmap.h>
27 #include <linux/slab.h>
28 #include <linux/debugfs.h>
29 #include <linux/scatterlist.h>
30 #include <linux/dma-mapping.h>
31 #include <linux/iommu-helper.h>
32 #include <linux/iommu.h>
33 #include <linux/delay.h>
34 #include <linux/amd-iommu.h>
35 #include <linux/notifier.h>
36 #include <linux/export.h>
37 #include <linux/irq.h>
38 #include <linux/msi.h>
39 #include <linux/dma-contiguous.h>
40 #include <linux/irqdomain.h>
41 #include <linux/percpu.h>
42 #include <linux/iova.h>
43 #include <asm/irq_remapping.h>
44 #include <asm/io_apic.h>
46 #include <asm/hw_irq.h>
47 #include <asm/msidef.h>
48 #include <asm/proto.h>
49 #include <asm/iommu.h>
53 #include "amd_iommu_proto.h"
54 #include "amd_iommu_types.h"
55 #include "irq_remapping.h"
57 #define AMD_IOMMU_MAPPING_ERROR 0
59 #define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28))
61 #define LOOP_TIMEOUT 100000
63 /* IO virtual address start page frame number */
64 #define IOVA_START_PFN (1)
65 #define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT)
66 #define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32))
68 /* Reserved IOVA ranges */
69 #define MSI_RANGE_START (0xfee00000)
70 #define MSI_RANGE_END (0xfeefffff)
71 #define HT_RANGE_START (0xfd00000000ULL)
72 #define HT_RANGE_END (0xffffffffffULL)
75 * This bitmap is used to advertise the page sizes our hardware support
76 * to the IOMMU core, which will then use this information to split
77 * physically contiguous memory regions it is mapping into page sizes
80 * 512GB Pages are not supported due to a hardware bug
82 #define AMD_IOMMU_PGSIZES ((~0xFFFUL) & ~(2ULL << 38))
84 static DEFINE_RWLOCK(amd_iommu_devtable_lock);
86 /* List of all available dev_data structures */
87 static LIST_HEAD(dev_data_list);
88 static DEFINE_SPINLOCK(dev_data_list_lock);
90 LIST_HEAD(ioapic_map);
92 LIST_HEAD(acpihid_map);
95 * Domain for untranslated devices - only allocated
96 * if iommu=pt passed on kernel cmd line.
98 const struct iommu_ops amd_iommu_ops;
100 static ATOMIC_NOTIFIER_HEAD(ppr_notifier);
101 int amd_iommu_max_glx_val = -1;
103 static const struct dma_map_ops amd_iommu_dma_ops;
106 * This struct contains device specific data for the IOMMU
108 struct iommu_dev_data {
109 struct list_head list; /* For domain->dev_list */
110 struct list_head dev_data_list; /* For global dev_data_list */
111 struct protection_domain *domain; /* Domain the device is bound to */
112 u16 devid; /* PCI Device ID */
113 u16 alias; /* Alias Device ID */
114 bool iommu_v2; /* Device can make use of IOMMUv2 */
115 bool passthrough; /* Device is identity mapped */
119 } ats; /* ATS state */
120 bool pri_tlp; /* PASID TLB required for
122 u32 errata; /* Bitmap for errata to apply */
123 bool use_vapic; /* Enable device to use vapic mode */
125 struct ratelimit_state rs; /* Ratelimit IOPF messages */
129 * general struct to manage commands send to an IOMMU
135 struct kmem_cache *amd_iommu_irq_cache;
137 static void update_domain(struct protection_domain *domain);
138 static int protection_domain_init(struct protection_domain *domain);
139 static void detach_device(struct device *dev);
141 #define FLUSH_QUEUE_SIZE 256
143 struct flush_queue_entry {
144 unsigned long iova_pfn;
146 u64 counter; /* Flush counter when this entry was added to the queue */
150 struct flush_queue_entry *entries;
156 * Data container for a dma_ops specific protection domain
158 struct dma_ops_domain {
159 /* generic protection domain information */
160 struct protection_domain domain;
163 struct iova_domain iovad;
165 struct flush_queue __percpu *flush_queue;
168 * We need two counter here to be race-free wrt. IOTLB flushing and
169 * adding entries to the flush queue.
171 * The flush_start_cnt is incremented _before_ the IOTLB flush starts.
172 * New entries added to the flush ring-buffer get their 'counter' value
173 * from here. This way we can make sure that entries added to the queue
174 * (or other per-cpu queues of the same domain) while the TLB is about
175 * to be flushed are not considered to be flushed already.
177 atomic64_t flush_start_cnt;
180 * The flush_finish_cnt is incremented when an IOTLB flush is complete.
181 * This value is always smaller than flush_start_cnt. The queue_add
182 * function frees all IOVAs that have a counter value smaller than
183 * flush_finish_cnt. This makes sure that we only free IOVAs that are
184 * flushed out of the IOTLB of the domain.
186 atomic64_t flush_finish_cnt;
189 * Timer to make sure we don't keep IOVAs around unflushed
192 struct timer_list flush_timer;
193 atomic_t flush_timer_on;
196 static struct iova_domain reserved_iova_ranges;
197 static struct lock_class_key reserved_rbtree_key;
199 /****************************************************************************
203 ****************************************************************************/
205 static inline int match_hid_uid(struct device *dev,
206 struct acpihid_map_entry *entry)
208 const char *hid, *uid;
210 hid = acpi_device_hid(ACPI_COMPANION(dev));
211 uid = acpi_device_uid(ACPI_COMPANION(dev));
217 return strcmp(hid, entry->hid);
220 return strcmp(hid, entry->hid);
222 return (strcmp(hid, entry->hid) || strcmp(uid, entry->uid));
225 static inline u16 get_pci_device_id(struct device *dev)
227 struct pci_dev *pdev = to_pci_dev(dev);
229 return PCI_DEVID(pdev->bus->number, pdev->devfn);
232 static inline int get_acpihid_device_id(struct device *dev,
233 struct acpihid_map_entry **entry)
235 struct acpihid_map_entry *p;
237 list_for_each_entry(p, &acpihid_map, list) {
238 if (!match_hid_uid(dev, p)) {
247 static inline int get_device_id(struct device *dev)
252 devid = get_pci_device_id(dev);
254 devid = get_acpihid_device_id(dev, NULL);
259 static struct protection_domain *to_pdomain(struct iommu_domain *dom)
261 return container_of(dom, struct protection_domain, domain);
264 static struct dma_ops_domain* to_dma_ops_domain(struct protection_domain *domain)
266 BUG_ON(domain->flags != PD_DMA_OPS_MASK);
267 return container_of(domain, struct dma_ops_domain, domain);
270 static struct iommu_dev_data *alloc_dev_data(u16 devid)
272 struct iommu_dev_data *dev_data;
275 dev_data = kzalloc(sizeof(*dev_data), GFP_KERNEL);
279 dev_data->devid = devid;
281 spin_lock_irqsave(&dev_data_list_lock, flags);
282 list_add_tail(&dev_data->dev_data_list, &dev_data_list);
283 spin_unlock_irqrestore(&dev_data_list_lock, flags);
285 ratelimit_default_init(&dev_data->rs);
290 static struct iommu_dev_data *search_dev_data(u16 devid)
292 struct iommu_dev_data *dev_data;
295 spin_lock_irqsave(&dev_data_list_lock, flags);
296 list_for_each_entry(dev_data, &dev_data_list, dev_data_list) {
297 if (dev_data->devid == devid)
304 spin_unlock_irqrestore(&dev_data_list_lock, flags);
309 static int __last_alias(struct pci_dev *pdev, u16 alias, void *data)
311 *(u16 *)data = alias;
315 static u16 get_alias(struct device *dev)
317 struct pci_dev *pdev = to_pci_dev(dev);
318 u16 devid, ivrs_alias, pci_alias;
320 /* The callers make sure that get_device_id() does not fail here */
321 devid = get_device_id(dev);
322 ivrs_alias = amd_iommu_alias_table[devid];
323 pci_for_each_dma_alias(pdev, __last_alias, &pci_alias);
325 if (ivrs_alias == pci_alias)
331 * The IVRS is fairly reliable in telling us about aliases, but it
332 * can't know about every screwy device. If we don't have an IVRS
333 * reported alias, use the PCI reported alias. In that case we may
334 * still need to initialize the rlookup and dev_table entries if the
335 * alias is to a non-existent device.
337 if (ivrs_alias == devid) {
338 if (!amd_iommu_rlookup_table[pci_alias]) {
339 amd_iommu_rlookup_table[pci_alias] =
340 amd_iommu_rlookup_table[devid];
341 memcpy(amd_iommu_dev_table[pci_alias].data,
342 amd_iommu_dev_table[devid].data,
343 sizeof(amd_iommu_dev_table[pci_alias].data));
349 pr_info("AMD-Vi: Using IVRS reported alias %02x:%02x.%d "
350 "for device %s[%04x:%04x], kernel reported alias "
351 "%02x:%02x.%d\n", PCI_BUS_NUM(ivrs_alias), PCI_SLOT(ivrs_alias),
352 PCI_FUNC(ivrs_alias), dev_name(dev), pdev->vendor, pdev->device,
353 PCI_BUS_NUM(pci_alias), PCI_SLOT(pci_alias),
354 PCI_FUNC(pci_alias));
357 * If we don't have a PCI DMA alias and the IVRS alias is on the same
358 * bus, then the IVRS table may know about a quirk that we don't.
360 if (pci_alias == devid &&
361 PCI_BUS_NUM(ivrs_alias) == pdev->bus->number) {
362 pci_add_dma_alias(pdev, ivrs_alias & 0xff);
363 pr_info("AMD-Vi: Added PCI DMA alias %02x.%d for %s\n",
364 PCI_SLOT(ivrs_alias), PCI_FUNC(ivrs_alias),
371 static struct iommu_dev_data *find_dev_data(u16 devid)
373 struct iommu_dev_data *dev_data;
375 dev_data = search_dev_data(devid);
377 if (dev_data == NULL)
378 dev_data = alloc_dev_data(devid);
383 static struct iommu_dev_data *get_dev_data(struct device *dev)
385 return dev->archdata.iommu;
389 * Find or create an IOMMU group for a acpihid device.
391 static struct iommu_group *acpihid_device_group(struct device *dev)
393 struct acpihid_map_entry *p, *entry = NULL;
396 devid = get_acpihid_device_id(dev, &entry);
398 return ERR_PTR(devid);
400 list_for_each_entry(p, &acpihid_map, list) {
401 if ((devid == p->devid) && p->group)
402 entry->group = p->group;
406 entry->group = generic_device_group(dev);
408 iommu_group_ref_get(entry->group);
413 static bool pci_iommuv2_capable(struct pci_dev *pdev)
415 static const int caps[] = {
418 PCI_EXT_CAP_ID_PASID,
422 for (i = 0; i < 3; ++i) {
423 pos = pci_find_ext_capability(pdev, caps[i]);
431 static bool pdev_pri_erratum(struct pci_dev *pdev, u32 erratum)
433 struct iommu_dev_data *dev_data;
435 dev_data = get_dev_data(&pdev->dev);
437 return dev_data->errata & (1 << erratum) ? true : false;
441 * This function checks if the driver got a valid device from the caller to
442 * avoid dereferencing invalid pointers.
444 static bool check_device(struct device *dev)
448 if (!dev || !dev->dma_mask)
451 devid = get_device_id(dev);
455 /* Out of our scope? */
456 if (devid > amd_iommu_last_bdf)
459 if (amd_iommu_rlookup_table[devid] == NULL)
465 static void init_iommu_group(struct device *dev)
467 struct iommu_group *group;
469 group = iommu_group_get_for_dev(dev);
473 iommu_group_put(group);
476 static int iommu_init_device(struct device *dev)
478 struct iommu_dev_data *dev_data;
479 struct amd_iommu *iommu;
482 if (dev->archdata.iommu)
485 devid = get_device_id(dev);
489 iommu = amd_iommu_rlookup_table[devid];
491 dev_data = find_dev_data(devid);
495 dev_data->alias = get_alias(dev);
497 if (dev_is_pci(dev) && pci_iommuv2_capable(to_pci_dev(dev))) {
498 struct amd_iommu *iommu;
500 iommu = amd_iommu_rlookup_table[dev_data->devid];
501 dev_data->iommu_v2 = iommu->is_iommu_v2;
504 dev->archdata.iommu = dev_data;
506 iommu_device_link(&iommu->iommu, dev);
511 static void iommu_ignore_device(struct device *dev)
516 devid = get_device_id(dev);
520 alias = get_alias(dev);
522 memset(&amd_iommu_dev_table[devid], 0, sizeof(struct dev_table_entry));
523 memset(&amd_iommu_dev_table[alias], 0, sizeof(struct dev_table_entry));
525 amd_iommu_rlookup_table[devid] = NULL;
526 amd_iommu_rlookup_table[alias] = NULL;
529 static void iommu_uninit_device(struct device *dev)
531 struct iommu_dev_data *dev_data;
532 struct amd_iommu *iommu;
535 devid = get_device_id(dev);
539 iommu = amd_iommu_rlookup_table[devid];
541 dev_data = search_dev_data(devid);
545 if (dev_data->domain)
548 iommu_device_unlink(&iommu->iommu, dev);
550 iommu_group_remove_device(dev);
556 * We keep dev_data around for unplugged devices and reuse it when the
557 * device is re-plugged - not doing so would introduce a ton of races.
561 /****************************************************************************
563 * Interrupt handling functions
565 ****************************************************************************/
567 static void dump_dte_entry(u16 devid)
571 for (i = 0; i < 4; ++i)
572 pr_err("AMD-Vi: DTE[%d]: %016llx\n", i,
573 amd_iommu_dev_table[devid].data[i]);
576 static void dump_command(unsigned long phys_addr)
578 struct iommu_cmd *cmd = phys_to_virt(phys_addr);
581 for (i = 0; i < 4; ++i)
582 pr_err("AMD-Vi: CMD[%d]: %08x\n", i, cmd->data[i]);
585 static void amd_iommu_report_page_fault(u16 devid, u16 domain_id,
586 u64 address, int flags)
588 struct iommu_dev_data *dev_data = NULL;
589 struct pci_dev *pdev;
591 pdev = pci_get_bus_and_slot(PCI_BUS_NUM(devid), devid & 0xff);
593 dev_data = get_dev_data(&pdev->dev);
595 if (dev_data && __ratelimit(&dev_data->rs)) {
596 dev_err(&pdev->dev, "AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x%04x address=0x%016llx flags=0x%04x]\n",
597 domain_id, address, flags);
598 } else if (printk_ratelimit()) {
599 pr_err("AMD-Vi: Event logged [IO_PAGE_FAULT device=%02x:%02x.%x domain=0x%04x address=0x%016llx flags=0x%04x]\n",
600 PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
601 domain_id, address, flags);
608 static void iommu_print_event(struct amd_iommu *iommu, void *__evt)
610 int type, devid, domid, flags;
611 volatile u32 *event = __evt;
616 type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK;
617 devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK;
618 domid = (event[1] >> EVENT_DOMID_SHIFT) & EVENT_DOMID_MASK;
619 flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK;
620 address = (u64)(((u64)event[3]) << 32) | event[2];
623 /* Did we hit the erratum? */
624 if (++count == LOOP_TIMEOUT) {
625 pr_err("AMD-Vi: No event written to event log\n");
632 if (type == EVENT_TYPE_IO_FAULT) {
633 amd_iommu_report_page_fault(devid, domid, address, flags);
636 printk(KERN_ERR "AMD-Vi: Event logged [");
640 case EVENT_TYPE_ILL_DEV:
641 printk("ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x "
642 "address=0x%016llx flags=0x%04x]\n",
643 PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
645 dump_dte_entry(devid);
647 case EVENT_TYPE_DEV_TAB_ERR:
648 printk("DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x "
649 "address=0x%016llx flags=0x%04x]\n",
650 PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
653 case EVENT_TYPE_PAGE_TAB_ERR:
654 printk("PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x "
655 "domain=0x%04x address=0x%016llx flags=0x%04x]\n",
656 PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
657 domid, address, flags);
659 case EVENT_TYPE_ILL_CMD:
660 printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address);
661 dump_command(address);
663 case EVENT_TYPE_CMD_HARD_ERR:
664 printk("COMMAND_HARDWARE_ERROR address=0x%016llx "
665 "flags=0x%04x]\n", address, flags);
667 case EVENT_TYPE_IOTLB_INV_TO:
668 printk("IOTLB_INV_TIMEOUT device=%02x:%02x.%x "
669 "address=0x%016llx]\n",
670 PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
673 case EVENT_TYPE_INV_DEV_REQ:
674 printk("INVALID_DEVICE_REQUEST device=%02x:%02x.%x "
675 "address=0x%016llx flags=0x%04x]\n",
676 PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
680 printk(KERN_ERR "UNKNOWN type=0x%02x]\n", type);
683 memset(__evt, 0, 4 * sizeof(u32));
686 static void iommu_poll_events(struct amd_iommu *iommu)
690 head = readl(iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);
691 tail = readl(iommu->mmio_base + MMIO_EVT_TAIL_OFFSET);
693 while (head != tail) {
694 iommu_print_event(iommu, iommu->evt_buf + head);
695 head = (head + EVENT_ENTRY_SIZE) % EVT_BUFFER_SIZE;
698 writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);
701 static void iommu_handle_ppr_entry(struct amd_iommu *iommu, u64 *raw)
703 struct amd_iommu_fault fault;
705 if (PPR_REQ_TYPE(raw[0]) != PPR_REQ_FAULT) {
706 pr_err_ratelimited("AMD-Vi: Unknown PPR request received\n");
710 fault.address = raw[1];
711 fault.pasid = PPR_PASID(raw[0]);
712 fault.device_id = PPR_DEVID(raw[0]);
713 fault.tag = PPR_TAG(raw[0]);
714 fault.flags = PPR_FLAGS(raw[0]);
716 atomic_notifier_call_chain(&ppr_notifier, 0, &fault);
719 static void iommu_poll_ppr_log(struct amd_iommu *iommu)
723 if (iommu->ppr_log == NULL)
726 head = readl(iommu->mmio_base + MMIO_PPR_HEAD_OFFSET);
727 tail = readl(iommu->mmio_base + MMIO_PPR_TAIL_OFFSET);
729 while (head != tail) {
734 raw = (u64 *)(iommu->ppr_log + head);
737 * Hardware bug: Interrupt may arrive before the entry is
738 * written to memory. If this happens we need to wait for the
741 for (i = 0; i < LOOP_TIMEOUT; ++i) {
742 if (PPR_REQ_TYPE(raw[0]) != 0)
747 /* Avoid memcpy function-call overhead */
752 * To detect the hardware bug we need to clear the entry
755 raw[0] = raw[1] = 0UL;
757 /* Update head pointer of hardware ring-buffer */
758 head = (head + PPR_ENTRY_SIZE) % PPR_LOG_SIZE;
759 writel(head, iommu->mmio_base + MMIO_PPR_HEAD_OFFSET);
761 /* Handle PPR entry */
762 iommu_handle_ppr_entry(iommu, entry);
764 /* Refresh ring-buffer information */
765 head = readl(iommu->mmio_base + MMIO_PPR_HEAD_OFFSET);
766 tail = readl(iommu->mmio_base + MMIO_PPR_TAIL_OFFSET);
770 #ifdef CONFIG_IRQ_REMAP
771 static int (*iommu_ga_log_notifier)(u32);
773 int amd_iommu_register_ga_log_notifier(int (*notifier)(u32))
775 iommu_ga_log_notifier = notifier;
779 EXPORT_SYMBOL(amd_iommu_register_ga_log_notifier);
781 static void iommu_poll_ga_log(struct amd_iommu *iommu)
783 u32 head, tail, cnt = 0;
785 if (iommu->ga_log == NULL)
788 head = readl(iommu->mmio_base + MMIO_GA_HEAD_OFFSET);
789 tail = readl(iommu->mmio_base + MMIO_GA_TAIL_OFFSET);
791 while (head != tail) {
795 raw = (u64 *)(iommu->ga_log + head);
798 /* Avoid memcpy function-call overhead */
801 /* Update head pointer of hardware ring-buffer */
802 head = (head + GA_ENTRY_SIZE) % GA_LOG_SIZE;
803 writel(head, iommu->mmio_base + MMIO_GA_HEAD_OFFSET);
805 /* Handle GA entry */
806 switch (GA_REQ_TYPE(log_entry)) {
808 if (!iommu_ga_log_notifier)
811 pr_debug("AMD-Vi: %s: devid=%#x, ga_tag=%#x\n",
812 __func__, GA_DEVID(log_entry),
815 if (iommu_ga_log_notifier(GA_TAG(log_entry)) != 0)
816 pr_err("AMD-Vi: GA log notifier failed.\n");
823 #endif /* CONFIG_IRQ_REMAP */
825 #define AMD_IOMMU_INT_MASK \
826 (MMIO_STATUS_EVT_INT_MASK | \
827 MMIO_STATUS_PPR_INT_MASK | \
828 MMIO_STATUS_GALOG_INT_MASK)
830 irqreturn_t amd_iommu_int_thread(int irq, void *data)
832 struct amd_iommu *iommu = (struct amd_iommu *) data;
833 u32 status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET);
835 while (status & AMD_IOMMU_INT_MASK) {
836 /* Enable EVT and PPR and GA interrupts again */
837 writel(AMD_IOMMU_INT_MASK,
838 iommu->mmio_base + MMIO_STATUS_OFFSET);
840 if (status & MMIO_STATUS_EVT_INT_MASK) {
841 pr_devel("AMD-Vi: Processing IOMMU Event Log\n");
842 iommu_poll_events(iommu);
845 if (status & MMIO_STATUS_PPR_INT_MASK) {
846 pr_devel("AMD-Vi: Processing IOMMU PPR Log\n");
847 iommu_poll_ppr_log(iommu);
850 #ifdef CONFIG_IRQ_REMAP
851 if (status & MMIO_STATUS_GALOG_INT_MASK) {
852 pr_devel("AMD-Vi: Processing IOMMU GA Log\n");
853 iommu_poll_ga_log(iommu);
858 * Hardware bug: ERBT1312
859 * When re-enabling interrupt (by writing 1
860 * to clear the bit), the hardware might also try to set
861 * the interrupt bit in the event status register.
862 * In this scenario, the bit will be set, and disable
863 * subsequent interrupts.
865 * Workaround: The IOMMU driver should read back the
866 * status register and check if the interrupt bits are cleared.
867 * If not, driver will need to go through the interrupt handler
868 * again and re-clear the bits
870 status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET);
875 irqreturn_t amd_iommu_int_handler(int irq, void *data)
877 return IRQ_WAKE_THREAD;
880 /****************************************************************************
882 * IOMMU command queuing functions
884 ****************************************************************************/
886 static int wait_on_sem(volatile u64 *sem)
890 while (*sem == 0 && i < LOOP_TIMEOUT) {
895 if (i == LOOP_TIMEOUT) {
896 pr_alert("AMD-Vi: Completion-Wait loop timed out\n");
903 static void copy_cmd_to_buffer(struct amd_iommu *iommu,
904 struct iommu_cmd *cmd)
908 target = iommu->cmd_buf + iommu->cmd_buf_tail;
910 iommu->cmd_buf_tail += sizeof(*cmd);
911 iommu->cmd_buf_tail %= CMD_BUFFER_SIZE;
913 /* Copy command to buffer */
914 memcpy(target, cmd, sizeof(*cmd));
916 /* Tell the IOMMU about it */
917 writel(iommu->cmd_buf_tail, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET);
920 static void build_completion_wait(struct iommu_cmd *cmd, u64 address)
922 WARN_ON(address & 0x7ULL);
924 memset(cmd, 0, sizeof(*cmd));
925 cmd->data[0] = lower_32_bits(__pa(address)) | CMD_COMPL_WAIT_STORE_MASK;
926 cmd->data[1] = upper_32_bits(__pa(address));
928 CMD_SET_TYPE(cmd, CMD_COMPL_WAIT);
931 static void build_inv_dte(struct iommu_cmd *cmd, u16 devid)
933 memset(cmd, 0, sizeof(*cmd));
934 cmd->data[0] = devid;
935 CMD_SET_TYPE(cmd, CMD_INV_DEV_ENTRY);
938 static void build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address,
939 size_t size, u16 domid, int pde)
944 pages = iommu_num_pages(address, size, PAGE_SIZE);
949 * If we have to flush more than one page, flush all
950 * TLB entries for this domain
952 address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS;
956 address &= PAGE_MASK;
958 memset(cmd, 0, sizeof(*cmd));
959 cmd->data[1] |= domid;
960 cmd->data[2] = lower_32_bits(address);
961 cmd->data[3] = upper_32_bits(address);
962 CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES);
963 if (s) /* size bit - we flush more than one 4kb page */
964 cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK;
965 if (pde) /* PDE bit - we want to flush everything, not only the PTEs */
966 cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK;
969 static void build_inv_iotlb_pages(struct iommu_cmd *cmd, u16 devid, int qdep,
970 u64 address, size_t size)
975 pages = iommu_num_pages(address, size, PAGE_SIZE);
980 * If we have to flush more than one page, flush all
981 * TLB entries for this domain
983 address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS;
987 address &= PAGE_MASK;
989 memset(cmd, 0, sizeof(*cmd));
990 cmd->data[0] = devid;
991 cmd->data[0] |= (qdep & 0xff) << 24;
992 cmd->data[1] = devid;
993 cmd->data[2] = lower_32_bits(address);
994 cmd->data[3] = upper_32_bits(address);
995 CMD_SET_TYPE(cmd, CMD_INV_IOTLB_PAGES);
997 cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK;
1000 static void build_inv_iommu_pasid(struct iommu_cmd *cmd, u16 domid, int pasid,
1001 u64 address, bool size)
1003 memset(cmd, 0, sizeof(*cmd));
1005 address &= ~(0xfffULL);
1007 cmd->data[0] = pasid;
1008 cmd->data[1] = domid;
1009 cmd->data[2] = lower_32_bits(address);
1010 cmd->data[3] = upper_32_bits(address);
1011 cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK;
1012 cmd->data[2] |= CMD_INV_IOMMU_PAGES_GN_MASK;
1014 cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK;
1015 CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES);
1018 static void build_inv_iotlb_pasid(struct iommu_cmd *cmd, u16 devid, int pasid,
1019 int qdep, u64 address, bool size)
1021 memset(cmd, 0, sizeof(*cmd));
1023 address &= ~(0xfffULL);
1025 cmd->data[0] = devid;
1026 cmd->data[0] |= ((pasid >> 8) & 0xff) << 16;
1027 cmd->data[0] |= (qdep & 0xff) << 24;
1028 cmd->data[1] = devid;
1029 cmd->data[1] |= (pasid & 0xff) << 16;
1030 cmd->data[2] = lower_32_bits(address);
1031 cmd->data[2] |= CMD_INV_IOMMU_PAGES_GN_MASK;
1032 cmd->data[3] = upper_32_bits(address);
1034 cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK;
1035 CMD_SET_TYPE(cmd, CMD_INV_IOTLB_PAGES);
1038 static void build_complete_ppr(struct iommu_cmd *cmd, u16 devid, int pasid,
1039 int status, int tag, bool gn)
1041 memset(cmd, 0, sizeof(*cmd));
1043 cmd->data[0] = devid;
1045 cmd->data[1] = pasid;
1046 cmd->data[2] = CMD_INV_IOMMU_PAGES_GN_MASK;
1048 cmd->data[3] = tag & 0x1ff;
1049 cmd->data[3] |= (status & PPR_STATUS_MASK) << PPR_STATUS_SHIFT;
1051 CMD_SET_TYPE(cmd, CMD_COMPLETE_PPR);
1054 static void build_inv_all(struct iommu_cmd *cmd)
1056 memset(cmd, 0, sizeof(*cmd));
1057 CMD_SET_TYPE(cmd, CMD_INV_ALL);
1060 static void build_inv_irt(struct iommu_cmd *cmd, u16 devid)
1062 memset(cmd, 0, sizeof(*cmd));
1063 cmd->data[0] = devid;
1064 CMD_SET_TYPE(cmd, CMD_INV_IRT);
1068 * Writes the command to the IOMMUs command buffer and informs the
1069 * hardware about the new command.
1071 static int __iommu_queue_command_sync(struct amd_iommu *iommu,
1072 struct iommu_cmd *cmd,
1075 unsigned int count = 0;
1076 u32 left, next_tail;
1078 next_tail = (iommu->cmd_buf_tail + sizeof(*cmd)) % CMD_BUFFER_SIZE;
1080 left = (iommu->cmd_buf_head - next_tail) % CMD_BUFFER_SIZE;
1083 /* Skip udelay() the first time around */
1085 if (count == LOOP_TIMEOUT) {
1086 pr_err("AMD-Vi: Command buffer timeout\n");
1093 /* Update head and recheck remaining space */
1094 iommu->cmd_buf_head = readl(iommu->mmio_base +
1095 MMIO_CMD_HEAD_OFFSET);
1100 copy_cmd_to_buffer(iommu, cmd);
1102 /* Do we need to make sure all commands are processed? */
1103 iommu->need_sync = sync;
1108 static int iommu_queue_command_sync(struct amd_iommu *iommu,
1109 struct iommu_cmd *cmd,
1112 unsigned long flags;
1115 spin_lock_irqsave(&iommu->lock, flags);
1116 ret = __iommu_queue_command_sync(iommu, cmd, sync);
1117 spin_unlock_irqrestore(&iommu->lock, flags);
1122 static int iommu_queue_command(struct amd_iommu *iommu, struct iommu_cmd *cmd)
1124 return iommu_queue_command_sync(iommu, cmd, true);
1128 * This function queues a completion wait command into the command
1129 * buffer of an IOMMU
1131 static int iommu_completion_wait(struct amd_iommu *iommu)
1133 struct iommu_cmd cmd;
1134 unsigned long flags;
1137 if (!iommu->need_sync)
1141 build_completion_wait(&cmd, (u64)&iommu->cmd_sem);
1143 spin_lock_irqsave(&iommu->lock, flags);
1147 ret = __iommu_queue_command_sync(iommu, &cmd, false);
1151 ret = wait_on_sem(&iommu->cmd_sem);
1154 spin_unlock_irqrestore(&iommu->lock, flags);
1159 static int iommu_flush_dte(struct amd_iommu *iommu, u16 devid)
1161 struct iommu_cmd cmd;
1163 build_inv_dte(&cmd, devid);
1165 return iommu_queue_command(iommu, &cmd);
1168 static void iommu_flush_dte_all(struct amd_iommu *iommu)
1172 for (devid = 0; devid <= 0xffff; ++devid)
1173 iommu_flush_dte(iommu, devid);
1175 iommu_completion_wait(iommu);
1179 * This function uses heavy locking and may disable irqs for some time. But
1180 * this is no issue because it is only called during resume.
1182 static void iommu_flush_tlb_all(struct amd_iommu *iommu)
1186 for (dom_id = 0; dom_id <= 0xffff; ++dom_id) {
1187 struct iommu_cmd cmd;
1188 build_inv_iommu_pages(&cmd, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
1190 iommu_queue_command(iommu, &cmd);
1193 iommu_completion_wait(iommu);
1196 static void iommu_flush_all(struct amd_iommu *iommu)
1198 struct iommu_cmd cmd;
1200 build_inv_all(&cmd);
1202 iommu_queue_command(iommu, &cmd);
1203 iommu_completion_wait(iommu);
1206 static void iommu_flush_irt(struct amd_iommu *iommu, u16 devid)
1208 struct iommu_cmd cmd;
1210 build_inv_irt(&cmd, devid);
1212 iommu_queue_command(iommu, &cmd);
1215 static void iommu_flush_irt_all(struct amd_iommu *iommu)
1219 for (devid = 0; devid <= MAX_DEV_TABLE_ENTRIES; devid++)
1220 iommu_flush_irt(iommu, devid);
1222 iommu_completion_wait(iommu);
1225 void iommu_flush_all_caches(struct amd_iommu *iommu)
1227 if (iommu_feature(iommu, FEATURE_IA)) {
1228 iommu_flush_all(iommu);
1230 iommu_flush_dte_all(iommu);
1231 iommu_flush_irt_all(iommu);
1232 iommu_flush_tlb_all(iommu);
1237 * Command send function for flushing on-device TLB
1239 static int device_flush_iotlb(struct iommu_dev_data *dev_data,
1240 u64 address, size_t size)
1242 struct amd_iommu *iommu;
1243 struct iommu_cmd cmd;
1246 qdep = dev_data->ats.qdep;
1247 iommu = amd_iommu_rlookup_table[dev_data->devid];
1249 build_inv_iotlb_pages(&cmd, dev_data->devid, qdep, address, size);
1251 return iommu_queue_command(iommu, &cmd);
1255 * Command send function for invalidating a device table entry
1257 static int device_flush_dte(struct iommu_dev_data *dev_data)
1259 struct amd_iommu *iommu;
1263 iommu = amd_iommu_rlookup_table[dev_data->devid];
1264 alias = dev_data->alias;
1266 ret = iommu_flush_dte(iommu, dev_data->devid);
1267 if (!ret && alias != dev_data->devid)
1268 ret = iommu_flush_dte(iommu, alias);
1272 if (dev_data->ats.enabled)
1273 ret = device_flush_iotlb(dev_data, 0, ~0UL);
1279 * TLB invalidation function which is called from the mapping functions.
1280 * It invalidates a single PTE if the range to flush is within a single
1281 * page. Otherwise it flushes the whole TLB of the IOMMU.
1283 static void __domain_flush_pages(struct protection_domain *domain,
1284 u64 address, size_t size, int pde)
1286 struct iommu_dev_data *dev_data;
1287 struct iommu_cmd cmd;
1290 build_inv_iommu_pages(&cmd, address, size, domain->id, pde);
1292 for (i = 0; i < amd_iommu_get_num_iommus(); ++i) {
1293 if (!domain->dev_iommu[i])
1297 * Devices of this domain are behind this IOMMU
1298 * We need a TLB flush
1300 ret |= iommu_queue_command(amd_iommus[i], &cmd);
1303 list_for_each_entry(dev_data, &domain->dev_list, list) {
1305 if (!dev_data->ats.enabled)
1308 ret |= device_flush_iotlb(dev_data, address, size);
1314 static void domain_flush_pages(struct protection_domain *domain,
1315 u64 address, size_t size)
1317 __domain_flush_pages(domain, address, size, 0);
1320 /* Flush the whole IO/TLB for a given protection domain */
1321 static void domain_flush_tlb(struct protection_domain *domain)
1323 __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 0);
1326 /* Flush the whole IO/TLB for a given protection domain - including PDE */
1327 static void domain_flush_tlb_pde(struct protection_domain *domain)
1329 __domain_flush_pages(domain, 0, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, 1);
1332 static void domain_flush_complete(struct protection_domain *domain)
1336 for (i = 0; i < amd_iommu_get_num_iommus(); ++i) {
1337 if (domain && !domain->dev_iommu[i])
1341 * Devices of this domain are behind this IOMMU
1342 * We need to wait for completion of all commands.
1344 iommu_completion_wait(amd_iommus[i]);
1350 * This function flushes the DTEs for all devices in domain
1352 static void domain_flush_devices(struct protection_domain *domain)
1354 struct iommu_dev_data *dev_data;
1356 list_for_each_entry(dev_data, &domain->dev_list, list)
1357 device_flush_dte(dev_data);
1360 /****************************************************************************
1362 * The functions below are used the create the page table mappings for
1363 * unity mapped regions.
1365 ****************************************************************************/
1368 * This function is used to add another level to an IO page table. Adding
1369 * another level increases the size of the address space by 9 bits to a size up
1372 static bool increase_address_space(struct protection_domain *domain,
1377 if (domain->mode == PAGE_MODE_6_LEVEL)
1378 /* address space already 64 bit large */
1381 pte = (void *)get_zeroed_page(gfp);
1385 *pte = PM_LEVEL_PDE(domain->mode,
1386 virt_to_phys(domain->pt_root));
1387 domain->pt_root = pte;
1389 domain->updated = true;
1394 static u64 *alloc_pte(struct protection_domain *domain,
1395 unsigned long address,
1396 unsigned long page_size,
1403 BUG_ON(!is_power_of_2(page_size));
1405 while (address > PM_LEVEL_SIZE(domain->mode))
1406 increase_address_space(domain, gfp);
1408 level = domain->mode - 1;
1409 pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)];
1410 address = PAGE_SIZE_ALIGN(address, page_size);
1411 end_lvl = PAGE_SIZE_LEVEL(page_size);
1413 while (level > end_lvl) {
1418 if (!IOMMU_PTE_PRESENT(__pte)) {
1419 page = (u64 *)get_zeroed_page(gfp);
1423 __npte = PM_LEVEL_PDE(level, virt_to_phys(page));
1425 /* pte could have been changed somewhere. */
1426 if (cmpxchg64(pte, __pte, __npte) != __pte) {
1427 free_page((unsigned long)page);
1432 /* No level skipping support yet */
1433 if (PM_PTE_LEVEL(*pte) != level)
1438 pte = IOMMU_PTE_PAGE(*pte);
1440 if (pte_page && level == end_lvl)
1443 pte = &pte[PM_LEVEL_INDEX(level, address)];
1450 * This function checks if there is a PTE for a given dma address. If
1451 * there is one, it returns the pointer to it.
1453 static u64 *fetch_pte(struct protection_domain *domain,
1454 unsigned long address,
1455 unsigned long *page_size)
1460 if (address > PM_LEVEL_SIZE(domain->mode))
1463 level = domain->mode - 1;
1464 pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)];
1465 *page_size = PTE_LEVEL_PAGE_SIZE(level);
1470 if (!IOMMU_PTE_PRESENT(*pte))
1474 if (PM_PTE_LEVEL(*pte) == 7 ||
1475 PM_PTE_LEVEL(*pte) == 0)
1478 /* No level skipping support yet */
1479 if (PM_PTE_LEVEL(*pte) != level)
1484 /* Walk to the next level */
1485 pte = IOMMU_PTE_PAGE(*pte);
1486 pte = &pte[PM_LEVEL_INDEX(level, address)];
1487 *page_size = PTE_LEVEL_PAGE_SIZE(level);
1490 if (PM_PTE_LEVEL(*pte) == 0x07) {
1491 unsigned long pte_mask;
1494 * If we have a series of large PTEs, make
1495 * sure to return a pointer to the first one.
1497 *page_size = pte_mask = PTE_PAGE_SIZE(*pte);
1498 pte_mask = ~((PAGE_SIZE_PTE_COUNT(pte_mask) << 3) - 1);
1499 pte = (u64 *)(((unsigned long)pte) & pte_mask);
1506 * Generic mapping functions. It maps a physical address into a DMA
1507 * address space. It allocates the page table pages if necessary.
1508 * In the future it can be extended to a generic mapping function
1509 * supporting all features of AMD IOMMU page tables like level skipping
1510 * and full 64 bit address spaces.
1512 static int iommu_map_page(struct protection_domain *dom,
1513 unsigned long bus_addr,
1514 unsigned long phys_addr,
1515 unsigned long page_size,
1522 BUG_ON(!IS_ALIGNED(bus_addr, page_size));
1523 BUG_ON(!IS_ALIGNED(phys_addr, page_size));
1525 if (!(prot & IOMMU_PROT_MASK))
1528 count = PAGE_SIZE_PTE_COUNT(page_size);
1529 pte = alloc_pte(dom, bus_addr, page_size, NULL, gfp);
1534 for (i = 0; i < count; ++i)
1535 if (IOMMU_PTE_PRESENT(pte[i]))
1539 __pte = PAGE_SIZE_PTE(phys_addr, page_size);
1540 __pte |= PM_LEVEL_ENC(7) | IOMMU_PTE_P | IOMMU_PTE_FC;
1542 __pte = phys_addr | IOMMU_PTE_P | IOMMU_PTE_FC;
1544 if (prot & IOMMU_PROT_IR)
1545 __pte |= IOMMU_PTE_IR;
1546 if (prot & IOMMU_PROT_IW)
1547 __pte |= IOMMU_PTE_IW;
1549 for (i = 0; i < count; ++i)
1557 static unsigned long iommu_unmap_page(struct protection_domain *dom,
1558 unsigned long bus_addr,
1559 unsigned long page_size)
1561 unsigned long long unmapped;
1562 unsigned long unmap_size;
1565 BUG_ON(!is_power_of_2(page_size));
1569 while (unmapped < page_size) {
1571 pte = fetch_pte(dom, bus_addr, &unmap_size);
1576 count = PAGE_SIZE_PTE_COUNT(unmap_size);
1577 for (i = 0; i < count; i++)
1581 bus_addr = (bus_addr & ~(unmap_size - 1)) + unmap_size;
1582 unmapped += unmap_size;
1585 BUG_ON(unmapped && !is_power_of_2(unmapped));
1590 /****************************************************************************
1592 * The next functions belong to the address allocator for the dma_ops
1593 * interface functions.
1595 ****************************************************************************/
1598 static unsigned long dma_ops_alloc_iova(struct device *dev,
1599 struct dma_ops_domain *dma_dom,
1600 unsigned int pages, u64 dma_mask)
1602 unsigned long pfn = 0;
1604 pages = __roundup_pow_of_two(pages);
1606 if (dma_mask > DMA_BIT_MASK(32))
1607 pfn = alloc_iova_fast(&dma_dom->iovad, pages,
1608 IOVA_PFN(DMA_BIT_MASK(32)));
1611 pfn = alloc_iova_fast(&dma_dom->iovad, pages, IOVA_PFN(dma_mask));
1613 return (pfn << PAGE_SHIFT);
1616 static void dma_ops_free_iova(struct dma_ops_domain *dma_dom,
1617 unsigned long address,
1620 pages = __roundup_pow_of_two(pages);
1621 address >>= PAGE_SHIFT;
1623 free_iova_fast(&dma_dom->iovad, address, pages);
1626 /****************************************************************************
1628 * The next functions belong to the domain allocation. A domain is
1629 * allocated for every IOMMU as the default domain. If device isolation
1630 * is enabled, every device get its own domain. The most important thing
1631 * about domains is the page table mapping the DMA address space they
1634 ****************************************************************************/
1637 * This function adds a protection domain to the global protection domain list
1639 static void add_domain_to_list(struct protection_domain *domain)
1641 unsigned long flags;
1643 spin_lock_irqsave(&amd_iommu_pd_lock, flags);
1644 list_add(&domain->list, &amd_iommu_pd_list);
1645 spin_unlock_irqrestore(&amd_iommu_pd_lock, flags);
1649 * This function removes a protection domain to the global
1650 * protection domain list
1652 static void del_domain_from_list(struct protection_domain *domain)
1654 unsigned long flags;
1656 spin_lock_irqsave(&amd_iommu_pd_lock, flags);
1657 list_del(&domain->list);
1658 spin_unlock_irqrestore(&amd_iommu_pd_lock, flags);
1661 static u16 domain_id_alloc(void)
1663 unsigned long flags;
1666 write_lock_irqsave(&amd_iommu_devtable_lock, flags);
1667 id = find_first_zero_bit(amd_iommu_pd_alloc_bitmap, MAX_DOMAIN_ID);
1669 if (id > 0 && id < MAX_DOMAIN_ID)
1670 __set_bit(id, amd_iommu_pd_alloc_bitmap);
1673 write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
1678 static void domain_id_free(int id)
1680 unsigned long flags;
1682 write_lock_irqsave(&amd_iommu_devtable_lock, flags);
1683 if (id > 0 && id < MAX_DOMAIN_ID)
1684 __clear_bit(id, amd_iommu_pd_alloc_bitmap);
1685 write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
1688 #define DEFINE_FREE_PT_FN(LVL, FN) \
1689 static void free_pt_##LVL (unsigned long __pt) \
1697 for (i = 0; i < 512; ++i) { \
1698 /* PTE present? */ \
1699 if (!IOMMU_PTE_PRESENT(pt[i])) \
1703 if (PM_PTE_LEVEL(pt[i]) == 0 || \
1704 PM_PTE_LEVEL(pt[i]) == 7) \
1707 p = (unsigned long)IOMMU_PTE_PAGE(pt[i]); \
1710 free_page((unsigned long)pt); \
1713 DEFINE_FREE_PT_FN(l2, free_page)
1714 DEFINE_FREE_PT_FN(l3, free_pt_l2)
1715 DEFINE_FREE_PT_FN(l4, free_pt_l3)
1716 DEFINE_FREE_PT_FN(l5, free_pt_l4)
1717 DEFINE_FREE_PT_FN(l6, free_pt_l5)
1719 static void free_pagetable(struct protection_domain *domain)
1721 unsigned long root = (unsigned long)domain->pt_root;
1723 switch (domain->mode) {
1724 case PAGE_MODE_NONE:
1726 case PAGE_MODE_1_LEVEL:
1729 case PAGE_MODE_2_LEVEL:
1732 case PAGE_MODE_3_LEVEL:
1735 case PAGE_MODE_4_LEVEL:
1738 case PAGE_MODE_5_LEVEL:
1741 case PAGE_MODE_6_LEVEL:
1749 static void free_gcr3_tbl_level1(u64 *tbl)
1754 for (i = 0; i < 512; ++i) {
1755 if (!(tbl[i] & GCR3_VALID))
1758 ptr = __va(tbl[i] & PAGE_MASK);
1760 free_page((unsigned long)ptr);
1764 static void free_gcr3_tbl_level2(u64 *tbl)
1769 for (i = 0; i < 512; ++i) {
1770 if (!(tbl[i] & GCR3_VALID))
1773 ptr = __va(tbl[i] & PAGE_MASK);
1775 free_gcr3_tbl_level1(ptr);
1779 static void free_gcr3_table(struct protection_domain *domain)
1781 if (domain->glx == 2)
1782 free_gcr3_tbl_level2(domain->gcr3_tbl);
1783 else if (domain->glx == 1)
1784 free_gcr3_tbl_level1(domain->gcr3_tbl);
1786 BUG_ON(domain->glx != 0);
1788 free_page((unsigned long)domain->gcr3_tbl);
1791 static void dma_ops_domain_free_flush_queue(struct dma_ops_domain *dom)
1795 for_each_possible_cpu(cpu) {
1796 struct flush_queue *queue;
1798 queue = per_cpu_ptr(dom->flush_queue, cpu);
1799 kfree(queue->entries);
1802 free_percpu(dom->flush_queue);
1804 dom->flush_queue = NULL;
1807 static int dma_ops_domain_alloc_flush_queue(struct dma_ops_domain *dom)
1811 atomic64_set(&dom->flush_start_cnt, 0);
1812 atomic64_set(&dom->flush_finish_cnt, 0);
1814 dom->flush_queue = alloc_percpu(struct flush_queue);
1815 if (!dom->flush_queue)
1818 /* First make sure everything is cleared */
1819 for_each_possible_cpu(cpu) {
1820 struct flush_queue *queue;
1822 queue = per_cpu_ptr(dom->flush_queue, cpu);
1825 queue->entries = NULL;
1828 /* Now start doing the allocation */
1829 for_each_possible_cpu(cpu) {
1830 struct flush_queue *queue;
1832 queue = per_cpu_ptr(dom->flush_queue, cpu);
1833 queue->entries = kzalloc(FLUSH_QUEUE_SIZE * sizeof(*queue->entries),
1835 if (!queue->entries) {
1836 dma_ops_domain_free_flush_queue(dom);
1840 spin_lock_init(&queue->lock);
1846 static void dma_ops_domain_flush_tlb(struct dma_ops_domain *dom)
1848 atomic64_inc(&dom->flush_start_cnt);
1849 domain_flush_tlb(&dom->domain);
1850 domain_flush_complete(&dom->domain);
1851 atomic64_inc(&dom->flush_finish_cnt);
1854 static inline bool queue_ring_full(struct flush_queue *queue)
1856 assert_spin_locked(&queue->lock);
1858 return (((queue->tail + 1) % FLUSH_QUEUE_SIZE) == queue->head);
1861 #define queue_ring_for_each(i, q) \
1862 for (i = (q)->head; i != (q)->tail; i = (i + 1) % FLUSH_QUEUE_SIZE)
1864 static inline unsigned queue_ring_add(struct flush_queue *queue)
1866 unsigned idx = queue->tail;
1868 assert_spin_locked(&queue->lock);
1869 queue->tail = (idx + 1) % FLUSH_QUEUE_SIZE;
1874 static inline void queue_ring_remove_head(struct flush_queue *queue)
1876 assert_spin_locked(&queue->lock);
1877 queue->head = (queue->head + 1) % FLUSH_QUEUE_SIZE;
1880 static void queue_ring_free_flushed(struct dma_ops_domain *dom,
1881 struct flush_queue *queue)
1883 u64 counter = atomic64_read(&dom->flush_finish_cnt);
1886 queue_ring_for_each(idx, queue) {
1888 * This assumes that counter values in the ring-buffer are
1889 * monotonously rising.
1891 if (queue->entries[idx].counter >= counter)
1894 free_iova_fast(&dom->iovad,
1895 queue->entries[idx].iova_pfn,
1896 queue->entries[idx].pages);
1898 queue_ring_remove_head(queue);
1902 static void queue_add(struct dma_ops_domain *dom,
1903 unsigned long address, unsigned long pages)
1905 struct flush_queue *queue;
1906 unsigned long flags;
1909 pages = __roundup_pow_of_two(pages);
1910 address >>= PAGE_SHIFT;
1912 queue = get_cpu_ptr(dom->flush_queue);
1913 spin_lock_irqsave(&queue->lock, flags);
1916 * First remove the enries from the ring-buffer that are already
1917 * flushed to make the below queue_ring_full() check less likely
1919 queue_ring_free_flushed(dom, queue);
1922 * When ring-queue is full, flush the entries from the IOTLB so
1923 * that we can free all entries with queue_ring_free_flushed()
1926 if (queue_ring_full(queue)) {
1927 dma_ops_domain_flush_tlb(dom);
1928 queue_ring_free_flushed(dom, queue);
1931 idx = queue_ring_add(queue);
1933 queue->entries[idx].iova_pfn = address;
1934 queue->entries[idx].pages = pages;
1935 queue->entries[idx].counter = atomic64_read(&dom->flush_start_cnt);
1937 spin_unlock_irqrestore(&queue->lock, flags);
1939 if (atomic_cmpxchg(&dom->flush_timer_on, 0, 1) == 0)
1940 mod_timer(&dom->flush_timer, jiffies + msecs_to_jiffies(10));
1942 put_cpu_ptr(dom->flush_queue);
1945 static void queue_flush_timeout(unsigned long data)
1947 struct dma_ops_domain *dom = (struct dma_ops_domain *)data;
1950 atomic_set(&dom->flush_timer_on, 0);
1952 dma_ops_domain_flush_tlb(dom);
1954 for_each_possible_cpu(cpu) {
1955 struct flush_queue *queue;
1956 unsigned long flags;
1958 queue = per_cpu_ptr(dom->flush_queue, cpu);
1959 spin_lock_irqsave(&queue->lock, flags);
1960 queue_ring_free_flushed(dom, queue);
1961 spin_unlock_irqrestore(&queue->lock, flags);
1966 * Free a domain, only used if something went wrong in the
1967 * allocation path and we need to free an already allocated page table
1969 static void dma_ops_domain_free(struct dma_ops_domain *dom)
1974 del_domain_from_list(&dom->domain);
1976 if (timer_pending(&dom->flush_timer))
1977 del_timer(&dom->flush_timer);
1979 dma_ops_domain_free_flush_queue(dom);
1981 put_iova_domain(&dom->iovad);
1983 free_pagetable(&dom->domain);
1986 domain_id_free(dom->domain.id);
1992 * Allocates a new protection domain usable for the dma_ops functions.
1993 * It also initializes the page table and the address allocator data
1994 * structures required for the dma_ops interface
1996 static struct dma_ops_domain *dma_ops_domain_alloc(void)
1998 struct dma_ops_domain *dma_dom;
2000 dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL);
2004 if (protection_domain_init(&dma_dom->domain))
2007 dma_dom->domain.mode = PAGE_MODE_3_LEVEL;
2008 dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL);
2009 dma_dom->domain.flags = PD_DMA_OPS_MASK;
2010 if (!dma_dom->domain.pt_root)
2013 init_iova_domain(&dma_dom->iovad, PAGE_SIZE,
2014 IOVA_START_PFN, DMA_32BIT_PFN);
2016 /* Initialize reserved ranges */
2017 copy_reserved_iova(&reserved_iova_ranges, &dma_dom->iovad);
2019 if (dma_ops_domain_alloc_flush_queue(dma_dom))
2022 setup_timer(&dma_dom->flush_timer, queue_flush_timeout,
2023 (unsigned long)dma_dom);
2025 atomic_set(&dma_dom->flush_timer_on, 0);
2027 add_domain_to_list(&dma_dom->domain);
2032 dma_ops_domain_free(dma_dom);
2038 * little helper function to check whether a given protection domain is a
2041 static bool dma_ops_domain(struct protection_domain *domain)
2043 return domain->flags & PD_DMA_OPS_MASK;
2046 static void set_dte_entry(u16 devid, struct protection_domain *domain, bool ats)
2051 if (domain->mode != PAGE_MODE_NONE)
2052 pte_root = virt_to_phys(domain->pt_root);
2054 pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK)
2055 << DEV_ENTRY_MODE_SHIFT;
2056 pte_root |= IOMMU_PTE_IR | IOMMU_PTE_IW | IOMMU_PTE_P | IOMMU_PTE_TV;
2058 flags = amd_iommu_dev_table[devid].data[1];
2061 flags |= DTE_FLAG_IOTLB;
2063 if (domain->flags & PD_IOMMUV2_MASK) {
2064 u64 gcr3 = __pa(domain->gcr3_tbl);
2065 u64 glx = domain->glx;
2068 pte_root |= DTE_FLAG_GV;
2069 pte_root |= (glx & DTE_GLX_MASK) << DTE_GLX_SHIFT;
2071 /* First mask out possible old values for GCR3 table */
2072 tmp = DTE_GCR3_VAL_B(~0ULL) << DTE_GCR3_SHIFT_B;
2075 tmp = DTE_GCR3_VAL_C(~0ULL) << DTE_GCR3_SHIFT_C;
2078 /* Encode GCR3 table into DTE */
2079 tmp = DTE_GCR3_VAL_A(gcr3) << DTE_GCR3_SHIFT_A;
2082 tmp = DTE_GCR3_VAL_B(gcr3) << DTE_GCR3_SHIFT_B;
2085 tmp = DTE_GCR3_VAL_C(gcr3) << DTE_GCR3_SHIFT_C;
2090 flags &= ~(DTE_FLAG_SA | 0xffffULL);
2091 flags |= domain->id;
2093 amd_iommu_dev_table[devid].data[1] = flags;
2094 amd_iommu_dev_table[devid].data[0] = pte_root;
2097 static void clear_dte_entry(u16 devid)
2099 /* remove entry from the device table seen by the hardware */
2100 amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV;
2101 amd_iommu_dev_table[devid].data[1] &= DTE_FLAG_MASK;
2103 amd_iommu_apply_erratum_63(devid);
2106 static void do_attach(struct iommu_dev_data *dev_data,
2107 struct protection_domain *domain)
2109 struct amd_iommu *iommu;
2113 iommu = amd_iommu_rlookup_table[dev_data->devid];
2114 alias = dev_data->alias;
2115 ats = dev_data->ats.enabled;
2117 /* Update data structures */
2118 dev_data->domain = domain;
2119 list_add(&dev_data->list, &domain->dev_list);
2121 /* Do reference counting */
2122 domain->dev_iommu[iommu->index] += 1;
2123 domain->dev_cnt += 1;
2125 /* Update device table */
2126 set_dte_entry(dev_data->devid, domain, ats);
2127 if (alias != dev_data->devid)
2128 set_dte_entry(alias, domain, ats);
2130 device_flush_dte(dev_data);
2133 static void do_detach(struct iommu_dev_data *dev_data)
2135 struct amd_iommu *iommu;
2139 * First check if the device is still attached. It might already
2140 * be detached from its domain because the generic
2141 * iommu_detach_group code detached it and we try again here in
2142 * our alias handling.
2144 if (!dev_data->domain)
2147 iommu = amd_iommu_rlookup_table[dev_data->devid];
2148 alias = dev_data->alias;
2150 /* decrease reference counters */
2151 dev_data->domain->dev_iommu[iommu->index] -= 1;
2152 dev_data->domain->dev_cnt -= 1;
2154 /* Update data structures */
2155 dev_data->domain = NULL;
2156 list_del(&dev_data->list);
2157 clear_dte_entry(dev_data->devid);
2158 if (alias != dev_data->devid)
2159 clear_dte_entry(alias);
2161 /* Flush the DTE entry */
2162 device_flush_dte(dev_data);
2166 * If a device is not yet associated with a domain, this function does
2167 * assigns it visible for the hardware
2169 static int __attach_device(struct iommu_dev_data *dev_data,
2170 struct protection_domain *domain)
2175 * Must be called with IRQs disabled. Warn here to detect early
2178 WARN_ON(!irqs_disabled());
2181 spin_lock(&domain->lock);
2184 if (dev_data->domain != NULL)
2187 /* Attach alias group root */
2188 do_attach(dev_data, domain);
2195 spin_unlock(&domain->lock);
2201 static void pdev_iommuv2_disable(struct pci_dev *pdev)
2203 pci_disable_ats(pdev);
2204 pci_disable_pri(pdev);
2205 pci_disable_pasid(pdev);
2208 /* FIXME: Change generic reset-function to do the same */
2209 static int pri_reset_while_enabled(struct pci_dev *pdev)
2214 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
2218 pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control);
2219 control |= PCI_PRI_CTRL_RESET;
2220 pci_write_config_word(pdev, pos + PCI_PRI_CTRL, control);
2225 static int pdev_iommuv2_enable(struct pci_dev *pdev)
2230 /* FIXME: Hardcode number of outstanding requests for now */
2232 if (pdev_pri_erratum(pdev, AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE))
2234 reset_enable = pdev_pri_erratum(pdev, AMD_PRI_DEV_ERRATUM_ENABLE_RESET);
2236 /* Only allow access to user-accessible pages */
2237 ret = pci_enable_pasid(pdev, 0);
2241 /* First reset the PRI state of the device */
2242 ret = pci_reset_pri(pdev);
2247 ret = pci_enable_pri(pdev, reqs);
2252 ret = pri_reset_while_enabled(pdev);
2257 ret = pci_enable_ats(pdev, PAGE_SHIFT);
2264 pci_disable_pri(pdev);
2265 pci_disable_pasid(pdev);
2270 /* FIXME: Move this to PCI code */
2271 #define PCI_PRI_TLP_OFF (1 << 15)
2273 static bool pci_pri_tlp_required(struct pci_dev *pdev)
2278 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
2282 pci_read_config_word(pdev, pos + PCI_PRI_STATUS, &status);
2284 return (status & PCI_PRI_TLP_OFF) ? true : false;
2288 * If a device is not yet associated with a domain, this function
2289 * assigns it visible for the hardware
2291 static int attach_device(struct device *dev,
2292 struct protection_domain *domain)
2294 struct pci_dev *pdev;
2295 struct iommu_dev_data *dev_data;
2296 unsigned long flags;
2299 dev_data = get_dev_data(dev);
2301 if (!dev_is_pci(dev))
2302 goto skip_ats_check;
2304 pdev = to_pci_dev(dev);
2305 if (domain->flags & PD_IOMMUV2_MASK) {
2306 if (!dev_data->passthrough)
2309 if (dev_data->iommu_v2) {
2310 if (pdev_iommuv2_enable(pdev) != 0)
2313 dev_data->ats.enabled = true;
2314 dev_data->ats.qdep = pci_ats_queue_depth(pdev);
2315 dev_data->pri_tlp = pci_pri_tlp_required(pdev);
2317 } else if (amd_iommu_iotlb_sup &&
2318 pci_enable_ats(pdev, PAGE_SHIFT) == 0) {
2319 dev_data->ats.enabled = true;
2320 dev_data->ats.qdep = pci_ats_queue_depth(pdev);
2324 write_lock_irqsave(&amd_iommu_devtable_lock, flags);
2325 ret = __attach_device(dev_data, domain);
2326 write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
2329 * We might boot into a crash-kernel here. The crashed kernel
2330 * left the caches in the IOMMU dirty. So we have to flush
2331 * here to evict all dirty stuff.
2333 domain_flush_tlb_pde(domain);
2339 * Removes a device from a protection domain (unlocked)
2341 static void __detach_device(struct iommu_dev_data *dev_data)
2343 struct protection_domain *domain;
2346 * Must be called with IRQs disabled. Warn here to detect early
2349 WARN_ON(!irqs_disabled());
2351 if (WARN_ON(!dev_data->domain))
2354 domain = dev_data->domain;
2356 spin_lock(&domain->lock);
2358 do_detach(dev_data);
2360 spin_unlock(&domain->lock);
2364 * Removes a device from a protection domain (with devtable_lock held)
2366 static void detach_device(struct device *dev)
2368 struct protection_domain *domain;
2369 struct iommu_dev_data *dev_data;
2370 unsigned long flags;
2372 dev_data = get_dev_data(dev);
2373 domain = dev_data->domain;
2375 /* lock device table */
2376 write_lock_irqsave(&amd_iommu_devtable_lock, flags);
2377 __detach_device(dev_data);
2378 write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
2380 if (!dev_is_pci(dev))
2383 if (domain->flags & PD_IOMMUV2_MASK && dev_data->iommu_v2)
2384 pdev_iommuv2_disable(to_pci_dev(dev));
2385 else if (dev_data->ats.enabled)
2386 pci_disable_ats(to_pci_dev(dev));
2388 dev_data->ats.enabled = false;
2391 static int amd_iommu_add_device(struct device *dev)
2393 struct iommu_dev_data *dev_data;
2394 struct iommu_domain *domain;
2395 struct amd_iommu *iommu;
2398 if (!check_device(dev) || get_dev_data(dev))
2401 devid = get_device_id(dev);
2405 iommu = amd_iommu_rlookup_table[devid];
2407 ret = iommu_init_device(dev);
2409 if (ret != -ENOTSUPP)
2410 pr_err("Failed to initialize device %s - trying to proceed anyway\n",
2413 iommu_ignore_device(dev);
2414 dev->dma_ops = &nommu_dma_ops;
2417 init_iommu_group(dev);
2419 dev_data = get_dev_data(dev);
2423 if (iommu_pass_through || dev_data->iommu_v2)
2424 iommu_request_dm_for_dev(dev);
2426 /* Domains are initialized for this device - have a look what we ended up with */
2427 domain = iommu_get_domain_for_dev(dev);
2428 if (domain->type == IOMMU_DOMAIN_IDENTITY)
2429 dev_data->passthrough = true;
2431 dev->dma_ops = &amd_iommu_dma_ops;
2434 iommu_completion_wait(iommu);
2439 static void amd_iommu_remove_device(struct device *dev)
2441 struct amd_iommu *iommu;
2444 if (!check_device(dev))
2447 devid = get_device_id(dev);
2451 iommu = amd_iommu_rlookup_table[devid];
2453 iommu_uninit_device(dev);
2454 iommu_completion_wait(iommu);
2457 static struct iommu_group *amd_iommu_device_group(struct device *dev)
2459 if (dev_is_pci(dev))
2460 return pci_device_group(dev);
2462 return acpihid_device_group(dev);
2465 /*****************************************************************************
2467 * The next functions belong to the dma_ops mapping/unmapping code.
2469 *****************************************************************************/
2472 * In the dma_ops path we only have the struct device. This function
2473 * finds the corresponding IOMMU, the protection domain and the
2474 * requestor id for a given device.
2475 * If the device is not yet associated with a domain this is also done
2478 static struct protection_domain *get_domain(struct device *dev)
2480 struct protection_domain *domain;
2482 if (!check_device(dev))
2483 return ERR_PTR(-EINVAL);
2485 domain = get_dev_data(dev)->domain;
2486 if (!dma_ops_domain(domain))
2487 return ERR_PTR(-EBUSY);
2492 static void update_device_table(struct protection_domain *domain)
2494 struct iommu_dev_data *dev_data;
2496 list_for_each_entry(dev_data, &domain->dev_list, list) {
2497 set_dte_entry(dev_data->devid, domain, dev_data->ats.enabled);
2499 if (dev_data->devid == dev_data->alias)
2502 /* There is an alias, update device table entry for it */
2503 set_dte_entry(dev_data->alias, domain, dev_data->ats.enabled);
2507 static void update_domain(struct protection_domain *domain)
2509 if (!domain->updated)
2512 update_device_table(domain);
2514 domain_flush_devices(domain);
2515 domain_flush_tlb_pde(domain);
2517 domain->updated = false;
2520 static int dir2prot(enum dma_data_direction direction)
2522 if (direction == DMA_TO_DEVICE)
2523 return IOMMU_PROT_IR;
2524 else if (direction == DMA_FROM_DEVICE)
2525 return IOMMU_PROT_IW;
2526 else if (direction == DMA_BIDIRECTIONAL)
2527 return IOMMU_PROT_IW | IOMMU_PROT_IR;
2532 * This function contains common code for mapping of a physically
2533 * contiguous memory region into DMA address space. It is used by all
2534 * mapping functions provided with this IOMMU driver.
2535 * Must be called with the domain lock held.
2537 static dma_addr_t __map_single(struct device *dev,
2538 struct dma_ops_domain *dma_dom,
2541 enum dma_data_direction direction,
2544 dma_addr_t offset = paddr & ~PAGE_MASK;
2545 dma_addr_t address, start, ret;
2550 pages = iommu_num_pages(paddr, size, PAGE_SIZE);
2553 address = dma_ops_alloc_iova(dev, dma_dom, pages, dma_mask);
2554 if (address == AMD_IOMMU_MAPPING_ERROR)
2557 prot = dir2prot(direction);
2560 for (i = 0; i < pages; ++i) {
2561 ret = iommu_map_page(&dma_dom->domain, start, paddr,
2562 PAGE_SIZE, prot, GFP_ATOMIC);
2571 if (unlikely(amd_iommu_np_cache)) {
2572 domain_flush_pages(&dma_dom->domain, address, size);
2573 domain_flush_complete(&dma_dom->domain);
2581 for (--i; i >= 0; --i) {
2583 iommu_unmap_page(&dma_dom->domain, start, PAGE_SIZE);
2586 domain_flush_tlb(&dma_dom->domain);
2587 domain_flush_complete(&dma_dom->domain);
2589 dma_ops_free_iova(dma_dom, address, pages);
2591 return AMD_IOMMU_MAPPING_ERROR;
2595 * Does the reverse of the __map_single function. Must be called with
2596 * the domain lock held too
2598 static void __unmap_single(struct dma_ops_domain *dma_dom,
2599 dma_addr_t dma_addr,
2603 dma_addr_t flush_addr;
2604 dma_addr_t i, start;
2607 flush_addr = dma_addr;
2608 pages = iommu_num_pages(dma_addr, size, PAGE_SIZE);
2609 dma_addr &= PAGE_MASK;
2612 for (i = 0; i < pages; ++i) {
2613 iommu_unmap_page(&dma_dom->domain, start, PAGE_SIZE);
2617 if (amd_iommu_unmap_flush) {
2618 dma_ops_free_iova(dma_dom, dma_addr, pages);
2619 domain_flush_tlb(&dma_dom->domain);
2620 domain_flush_complete(&dma_dom->domain);
2622 queue_add(dma_dom, dma_addr, pages);
2627 * The exported map_single function for dma_ops.
2629 static dma_addr_t map_page(struct device *dev, struct page *page,
2630 unsigned long offset, size_t size,
2631 enum dma_data_direction dir,
2632 unsigned long attrs)
2634 phys_addr_t paddr = page_to_phys(page) + offset;
2635 struct protection_domain *domain;
2636 struct dma_ops_domain *dma_dom;
2639 domain = get_domain(dev);
2640 if (PTR_ERR(domain) == -EINVAL)
2641 return (dma_addr_t)paddr;
2642 else if (IS_ERR(domain))
2643 return AMD_IOMMU_MAPPING_ERROR;
2645 dma_mask = *dev->dma_mask;
2646 dma_dom = to_dma_ops_domain(domain);
2648 return __map_single(dev, dma_dom, paddr, size, dir, dma_mask);
2652 * The exported unmap_single function for dma_ops.
2654 static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size,
2655 enum dma_data_direction dir, unsigned long attrs)
2657 struct protection_domain *domain;
2658 struct dma_ops_domain *dma_dom;
2660 domain = get_domain(dev);
2664 dma_dom = to_dma_ops_domain(domain);
2666 __unmap_single(dma_dom, dma_addr, size, dir);
2669 static int sg_num_pages(struct device *dev,
2670 struct scatterlist *sglist,
2673 unsigned long mask, boundary_size;
2674 struct scatterlist *s;
2677 mask = dma_get_seg_boundary(dev);
2678 boundary_size = mask + 1 ? ALIGN(mask + 1, PAGE_SIZE) >> PAGE_SHIFT :
2679 1UL << (BITS_PER_LONG - PAGE_SHIFT);
2681 for_each_sg(sglist, s, nelems, i) {
2684 s->dma_address = npages << PAGE_SHIFT;
2685 p = npages % boundary_size;
2686 n = iommu_num_pages(sg_phys(s), s->length, PAGE_SIZE);
2687 if (p + n > boundary_size)
2688 npages += boundary_size - p;
2696 * The exported map_sg function for dma_ops (handles scatter-gather
2699 static int map_sg(struct device *dev, struct scatterlist *sglist,
2700 int nelems, enum dma_data_direction direction,
2701 unsigned long attrs)
2703 int mapped_pages = 0, npages = 0, prot = 0, i;
2704 struct protection_domain *domain;
2705 struct dma_ops_domain *dma_dom;
2706 struct scatterlist *s;
2707 unsigned long address;
2710 domain = get_domain(dev);
2714 dma_dom = to_dma_ops_domain(domain);
2715 dma_mask = *dev->dma_mask;
2717 npages = sg_num_pages(dev, sglist, nelems);
2719 address = dma_ops_alloc_iova(dev, dma_dom, npages, dma_mask);
2720 if (address == AMD_IOMMU_MAPPING_ERROR)
2723 prot = dir2prot(direction);
2725 /* Map all sg entries */
2726 for_each_sg(sglist, s, nelems, i) {
2727 int j, pages = iommu_num_pages(sg_phys(s), s->length, PAGE_SIZE);
2729 for (j = 0; j < pages; ++j) {
2730 unsigned long bus_addr, phys_addr;
2733 bus_addr = address + s->dma_address + (j << PAGE_SHIFT);
2734 phys_addr = (sg_phys(s) & PAGE_MASK) + (j << PAGE_SHIFT);
2735 ret = iommu_map_page(domain, bus_addr, phys_addr, PAGE_SIZE, prot, GFP_ATOMIC);
2743 /* Everything is mapped - write the right values into s->dma_address */
2744 for_each_sg(sglist, s, nelems, i) {
2745 s->dma_address += address + s->offset;
2746 s->dma_length = s->length;
2752 pr_err("%s: IOMMU mapping error in map_sg (io-pages: %d)\n",
2753 dev_name(dev), npages);
2755 for_each_sg(sglist, s, nelems, i) {
2756 int j, pages = iommu_num_pages(sg_phys(s), s->length, PAGE_SIZE);
2758 for (j = 0; j < pages; ++j) {
2759 unsigned long bus_addr;
2761 bus_addr = address + s->dma_address + (j << PAGE_SHIFT);
2762 iommu_unmap_page(domain, bus_addr, PAGE_SIZE);
2770 free_iova_fast(&dma_dom->iovad, address, npages);
2777 * The exported map_sg function for dma_ops (handles scatter-gather
2780 static void unmap_sg(struct device *dev, struct scatterlist *sglist,
2781 int nelems, enum dma_data_direction dir,
2782 unsigned long attrs)
2784 struct protection_domain *domain;
2785 struct dma_ops_domain *dma_dom;
2786 unsigned long startaddr;
2789 domain = get_domain(dev);
2793 startaddr = sg_dma_address(sglist) & PAGE_MASK;
2794 dma_dom = to_dma_ops_domain(domain);
2795 npages = sg_num_pages(dev, sglist, nelems);
2797 __unmap_single(dma_dom, startaddr, npages << PAGE_SHIFT, dir);
2801 * The exported alloc_coherent function for dma_ops.
2803 static void *alloc_coherent(struct device *dev, size_t size,
2804 dma_addr_t *dma_addr, gfp_t flag,
2805 unsigned long attrs)
2807 u64 dma_mask = dev->coherent_dma_mask;
2808 struct protection_domain *domain;
2809 struct dma_ops_domain *dma_dom;
2812 domain = get_domain(dev);
2813 if (PTR_ERR(domain) == -EINVAL) {
2814 page = alloc_pages(flag, get_order(size));
2815 *dma_addr = page_to_phys(page);
2816 return page_address(page);
2817 } else if (IS_ERR(domain))
2820 dma_dom = to_dma_ops_domain(domain);
2821 size = PAGE_ALIGN(size);
2822 dma_mask = dev->coherent_dma_mask;
2823 flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
2826 page = alloc_pages(flag | __GFP_NOWARN, get_order(size));
2828 if (!gfpflags_allow_blocking(flag))
2831 page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT,
2832 get_order(size), flag);
2838 dma_mask = *dev->dma_mask;
2840 *dma_addr = __map_single(dev, dma_dom, page_to_phys(page),
2841 size, DMA_BIDIRECTIONAL, dma_mask);
2843 if (*dma_addr == AMD_IOMMU_MAPPING_ERROR)
2846 return page_address(page);
2850 if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT))
2851 __free_pages(page, get_order(size));
2857 * The exported free_coherent function for dma_ops.
2859 static void free_coherent(struct device *dev, size_t size,
2860 void *virt_addr, dma_addr_t dma_addr,
2861 unsigned long attrs)
2863 struct protection_domain *domain;
2864 struct dma_ops_domain *dma_dom;
2867 page = virt_to_page(virt_addr);
2868 size = PAGE_ALIGN(size);
2870 domain = get_domain(dev);
2874 dma_dom = to_dma_ops_domain(domain);
2876 __unmap_single(dma_dom, dma_addr, size, DMA_BIDIRECTIONAL);
2879 if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT))
2880 __free_pages(page, get_order(size));
2884 * This function is called by the DMA layer to find out if we can handle a
2885 * particular device. It is part of the dma_ops.
2887 static int amd_iommu_dma_supported(struct device *dev, u64 mask)
2889 if (!x86_dma_supported(dev, mask))
2891 return check_device(dev);
2894 static int amd_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr)
2896 return dma_addr == AMD_IOMMU_MAPPING_ERROR;
2899 static const struct dma_map_ops amd_iommu_dma_ops = {
2900 .alloc = alloc_coherent,
2901 .free = free_coherent,
2902 .map_page = map_page,
2903 .unmap_page = unmap_page,
2905 .unmap_sg = unmap_sg,
2906 .dma_supported = amd_iommu_dma_supported,
2907 .mapping_error = amd_iommu_mapping_error,
2910 static int init_reserved_iova_ranges(void)
2912 struct pci_dev *pdev = NULL;
2915 init_iova_domain(&reserved_iova_ranges, PAGE_SIZE,
2916 IOVA_START_PFN, DMA_32BIT_PFN);
2918 lockdep_set_class(&reserved_iova_ranges.iova_rbtree_lock,
2919 &reserved_rbtree_key);
2921 /* MSI memory range */
2922 val = reserve_iova(&reserved_iova_ranges,
2923 IOVA_PFN(MSI_RANGE_START), IOVA_PFN(MSI_RANGE_END));
2925 pr_err("Reserving MSI range failed\n");
2929 /* HT memory range */
2930 val = reserve_iova(&reserved_iova_ranges,
2931 IOVA_PFN(HT_RANGE_START), IOVA_PFN(HT_RANGE_END));
2933 pr_err("Reserving HT range failed\n");
2938 * Memory used for PCI resources
2939 * FIXME: Check whether we can reserve the PCI-hole completly
2941 for_each_pci_dev(pdev) {
2944 for (i = 0; i < PCI_NUM_RESOURCES; ++i) {
2945 struct resource *r = &pdev->resource[i];
2947 if (!(r->flags & IORESOURCE_MEM))
2950 val = reserve_iova(&reserved_iova_ranges,
2954 pr_err("Reserve pci-resource range failed\n");
2963 int __init amd_iommu_init_api(void)
2967 ret = iova_cache_get();
2971 ret = init_reserved_iova_ranges();
2975 err = bus_set_iommu(&pci_bus_type, &amd_iommu_ops);
2978 #ifdef CONFIG_ARM_AMBA
2979 err = bus_set_iommu(&amba_bustype, &amd_iommu_ops);
2983 err = bus_set_iommu(&platform_bus_type, &amd_iommu_ops);
2990 int __init amd_iommu_init_dma_ops(void)
2992 swiotlb = iommu_pass_through ? 1 : 0;
2996 * In case we don't initialize SWIOTLB (actually the common case
2997 * when AMD IOMMU is enabled), make sure there are global
2998 * dma_ops set as a fall-back for devices not handled by this
2999 * driver (for example non-PCI devices).
3002 dma_ops = &nommu_dma_ops;
3004 if (amd_iommu_unmap_flush)
3005 pr_info("AMD-Vi: IO/TLB flush on unmap enabled\n");
3007 pr_info("AMD-Vi: Lazy IO/TLB flushing enabled\n");
3013 /*****************************************************************************
3015 * The following functions belong to the exported interface of AMD IOMMU
3017 * This interface allows access to lower level functions of the IOMMU
3018 * like protection domain handling and assignement of devices to domains
3019 * which is not possible with the dma_ops interface.
3021 *****************************************************************************/
3023 static void cleanup_domain(struct protection_domain *domain)
3025 struct iommu_dev_data *entry;
3026 unsigned long flags;
3028 write_lock_irqsave(&amd_iommu_devtable_lock, flags);
3030 while (!list_empty(&domain->dev_list)) {
3031 entry = list_first_entry(&domain->dev_list,
3032 struct iommu_dev_data, list);
3033 __detach_device(entry);
3036 write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
3039 static void protection_domain_free(struct protection_domain *domain)
3044 del_domain_from_list(domain);
3047 domain_id_free(domain->id);
3052 static int protection_domain_init(struct protection_domain *domain)
3054 spin_lock_init(&domain->lock);
3055 mutex_init(&domain->api_lock);
3056 domain->id = domain_id_alloc();
3059 INIT_LIST_HEAD(&domain->dev_list);
3064 static struct protection_domain *protection_domain_alloc(void)
3066 struct protection_domain *domain;
3068 domain = kzalloc(sizeof(*domain), GFP_KERNEL);
3072 if (protection_domain_init(domain))
3075 add_domain_to_list(domain);
3085 static struct iommu_domain *amd_iommu_domain_alloc(unsigned type)
3087 struct protection_domain *pdomain;
3088 struct dma_ops_domain *dma_domain;
3091 case IOMMU_DOMAIN_UNMANAGED:
3092 pdomain = protection_domain_alloc();
3096 pdomain->mode = PAGE_MODE_3_LEVEL;
3097 pdomain->pt_root = (void *)get_zeroed_page(GFP_KERNEL);
3098 if (!pdomain->pt_root) {
3099 protection_domain_free(pdomain);
3103 pdomain->domain.geometry.aperture_start = 0;
3104 pdomain->domain.geometry.aperture_end = ~0ULL;
3105 pdomain->domain.geometry.force_aperture = true;
3108 case IOMMU_DOMAIN_DMA:
3109 dma_domain = dma_ops_domain_alloc();
3111 pr_err("AMD-Vi: Failed to allocate\n");
3114 pdomain = &dma_domain->domain;
3116 case IOMMU_DOMAIN_IDENTITY:
3117 pdomain = protection_domain_alloc();
3121 pdomain->mode = PAGE_MODE_NONE;
3127 return &pdomain->domain;
3130 static void amd_iommu_domain_free(struct iommu_domain *dom)
3132 struct protection_domain *domain;
3133 struct dma_ops_domain *dma_dom;
3135 domain = to_pdomain(dom);
3137 if (domain->dev_cnt > 0)
3138 cleanup_domain(domain);
3140 BUG_ON(domain->dev_cnt != 0);
3145 switch (dom->type) {
3146 case IOMMU_DOMAIN_DMA:
3147 /* Now release the domain */
3148 dma_dom = to_dma_ops_domain(domain);
3149 dma_ops_domain_free(dma_dom);
3152 if (domain->mode != PAGE_MODE_NONE)
3153 free_pagetable(domain);
3155 if (domain->flags & PD_IOMMUV2_MASK)
3156 free_gcr3_table(domain);
3158 protection_domain_free(domain);
3163 static void amd_iommu_detach_device(struct iommu_domain *dom,
3166 struct iommu_dev_data *dev_data = dev->archdata.iommu;
3167 struct amd_iommu *iommu;
3170 if (!check_device(dev))
3173 devid = get_device_id(dev);
3177 if (dev_data->domain != NULL)
3180 iommu = amd_iommu_rlookup_table[devid];
3184 #ifdef CONFIG_IRQ_REMAP
3185 if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) &&
3186 (dom->type == IOMMU_DOMAIN_UNMANAGED))
3187 dev_data->use_vapic = 0;
3190 iommu_completion_wait(iommu);
3193 static int amd_iommu_attach_device(struct iommu_domain *dom,
3196 struct protection_domain *domain = to_pdomain(dom);
3197 struct iommu_dev_data *dev_data;
3198 struct amd_iommu *iommu;
3201 if (!check_device(dev))
3204 dev_data = dev->archdata.iommu;
3206 iommu = amd_iommu_rlookup_table[dev_data->devid];
3210 if (dev_data->domain)
3213 ret = attach_device(dev, domain);
3215 #ifdef CONFIG_IRQ_REMAP
3216 if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir)) {
3217 if (dom->type == IOMMU_DOMAIN_UNMANAGED)
3218 dev_data->use_vapic = 1;
3220 dev_data->use_vapic = 0;
3224 iommu_completion_wait(iommu);
3229 static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova,
3230 phys_addr_t paddr, size_t page_size, int iommu_prot)
3232 struct protection_domain *domain = to_pdomain(dom);
3236 if (domain->mode == PAGE_MODE_NONE)
3239 if (iommu_prot & IOMMU_READ)
3240 prot |= IOMMU_PROT_IR;
3241 if (iommu_prot & IOMMU_WRITE)
3242 prot |= IOMMU_PROT_IW;
3244 mutex_lock(&domain->api_lock);
3245 ret = iommu_map_page(domain, iova, paddr, page_size, prot, GFP_KERNEL);
3246 mutex_unlock(&domain->api_lock);
3251 static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova,
3254 struct protection_domain *domain = to_pdomain(dom);
3257 if (domain->mode == PAGE_MODE_NONE)
3260 mutex_lock(&domain->api_lock);
3261 unmap_size = iommu_unmap_page(domain, iova, page_size);
3262 mutex_unlock(&domain->api_lock);
3264 domain_flush_tlb_pde(domain);
3269 static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom,
3272 struct protection_domain *domain = to_pdomain(dom);
3273 unsigned long offset_mask, pte_pgsize;
3276 if (domain->mode == PAGE_MODE_NONE)
3279 pte = fetch_pte(domain, iova, &pte_pgsize);
3281 if (!pte || !IOMMU_PTE_PRESENT(*pte))
3284 offset_mask = pte_pgsize - 1;
3285 __pte = *pte & PM_ADDR_MASK;
3287 return (__pte & ~offset_mask) | (iova & offset_mask);
3290 static bool amd_iommu_capable(enum iommu_cap cap)
3293 case IOMMU_CAP_CACHE_COHERENCY:
3295 case IOMMU_CAP_INTR_REMAP:
3296 return (irq_remapping_enabled == 1);
3297 case IOMMU_CAP_NOEXEC:
3304 static void amd_iommu_get_resv_regions(struct device *dev,
3305 struct list_head *head)
3307 struct iommu_resv_region *region;
3308 struct unity_map_entry *entry;
3311 devid = get_device_id(dev);
3315 list_for_each_entry(entry, &amd_iommu_unity_map, list) {
3319 if (devid < entry->devid_start || devid > entry->devid_end)
3322 length = entry->address_end - entry->address_start;
3323 if (entry->prot & IOMMU_PROT_IR)
3325 if (entry->prot & IOMMU_PROT_IW)
3326 prot |= IOMMU_WRITE;
3328 region = iommu_alloc_resv_region(entry->address_start,
3332 pr_err("Out of memory allocating dm-regions for %s\n",
3336 list_add_tail(®ion->list, head);
3339 region = iommu_alloc_resv_region(MSI_RANGE_START,
3340 MSI_RANGE_END - MSI_RANGE_START + 1,
3344 list_add_tail(®ion->list, head);
3346 region = iommu_alloc_resv_region(HT_RANGE_START,
3347 HT_RANGE_END - HT_RANGE_START + 1,
3348 0, IOMMU_RESV_RESERVED);
3351 list_add_tail(®ion->list, head);
3354 static void amd_iommu_put_resv_regions(struct device *dev,
3355 struct list_head *head)
3357 struct iommu_resv_region *entry, *next;
3359 list_for_each_entry_safe(entry, next, head, list)
3363 static void amd_iommu_apply_resv_region(struct device *dev,
3364 struct iommu_domain *domain,
3365 struct iommu_resv_region *region)
3367 struct dma_ops_domain *dma_dom = to_dma_ops_domain(to_pdomain(domain));
3368 unsigned long start, end;
3370 start = IOVA_PFN(region->start);
3371 end = IOVA_PFN(region->start + region->length);
3373 WARN_ON_ONCE(reserve_iova(&dma_dom->iovad, start, end) == NULL);
3376 const struct iommu_ops amd_iommu_ops = {
3377 .capable = amd_iommu_capable,
3378 .domain_alloc = amd_iommu_domain_alloc,
3379 .domain_free = amd_iommu_domain_free,
3380 .attach_dev = amd_iommu_attach_device,
3381 .detach_dev = amd_iommu_detach_device,
3382 .map = amd_iommu_map,
3383 .unmap = amd_iommu_unmap,
3384 .map_sg = default_iommu_map_sg,
3385 .iova_to_phys = amd_iommu_iova_to_phys,
3386 .add_device = amd_iommu_add_device,
3387 .remove_device = amd_iommu_remove_device,
3388 .device_group = amd_iommu_device_group,
3389 .get_resv_regions = amd_iommu_get_resv_regions,
3390 .put_resv_regions = amd_iommu_put_resv_regions,
3391 .apply_resv_region = amd_iommu_apply_resv_region,
3392 .pgsize_bitmap = AMD_IOMMU_PGSIZES,
3395 /*****************************************************************************
3397 * The next functions do a basic initialization of IOMMU for pass through
3400 * In passthrough mode the IOMMU is initialized and enabled but not used for
3401 * DMA-API translation.
3403 *****************************************************************************/
3405 /* IOMMUv2 specific functions */
3406 int amd_iommu_register_ppr_notifier(struct notifier_block *nb)
3408 return atomic_notifier_chain_register(&ppr_notifier, nb);
3410 EXPORT_SYMBOL(amd_iommu_register_ppr_notifier);
3412 int amd_iommu_unregister_ppr_notifier(struct notifier_block *nb)
3414 return atomic_notifier_chain_unregister(&ppr_notifier, nb);
3416 EXPORT_SYMBOL(amd_iommu_unregister_ppr_notifier);
3418 void amd_iommu_domain_direct_map(struct iommu_domain *dom)
3420 struct protection_domain *domain = to_pdomain(dom);
3421 unsigned long flags;
3423 spin_lock_irqsave(&domain->lock, flags);
3425 /* Update data structure */
3426 domain->mode = PAGE_MODE_NONE;
3427 domain->updated = true;
3429 /* Make changes visible to IOMMUs */
3430 update_domain(domain);
3432 /* Page-table is not visible to IOMMU anymore, so free it */
3433 free_pagetable(domain);
3435 spin_unlock_irqrestore(&domain->lock, flags);
3437 EXPORT_SYMBOL(amd_iommu_domain_direct_map);
3439 int amd_iommu_domain_enable_v2(struct iommu_domain *dom, int pasids)
3441 struct protection_domain *domain = to_pdomain(dom);
3442 unsigned long flags;
3445 if (pasids <= 0 || pasids > (PASID_MASK + 1))
3448 /* Number of GCR3 table levels required */
3449 for (levels = 0; (pasids - 1) & ~0x1ff; pasids >>= 9)
3452 if (levels > amd_iommu_max_glx_val)
3455 spin_lock_irqsave(&domain->lock, flags);
3458 * Save us all sanity checks whether devices already in the
3459 * domain support IOMMUv2. Just force that the domain has no
3460 * devices attached when it is switched into IOMMUv2 mode.
3463 if (domain->dev_cnt > 0 || domain->flags & PD_IOMMUV2_MASK)
3467 domain->gcr3_tbl = (void *)get_zeroed_page(GFP_ATOMIC);
3468 if (domain->gcr3_tbl == NULL)
3471 domain->glx = levels;
3472 domain->flags |= PD_IOMMUV2_MASK;
3473 domain->updated = true;
3475 update_domain(domain);
3480 spin_unlock_irqrestore(&domain->lock, flags);
3484 EXPORT_SYMBOL(amd_iommu_domain_enable_v2);
3486 static int __flush_pasid(struct protection_domain *domain, int pasid,
3487 u64 address, bool size)
3489 struct iommu_dev_data *dev_data;
3490 struct iommu_cmd cmd;
3493 if (!(domain->flags & PD_IOMMUV2_MASK))
3496 build_inv_iommu_pasid(&cmd, domain->id, pasid, address, size);
3499 * IOMMU TLB needs to be flushed before Device TLB to
3500 * prevent device TLB refill from IOMMU TLB
3502 for (i = 0; i < amd_iommu_get_num_iommus(); ++i) {
3503 if (domain->dev_iommu[i] == 0)
3506 ret = iommu_queue_command(amd_iommus[i], &cmd);
3511 /* Wait until IOMMU TLB flushes are complete */
3512 domain_flush_complete(domain);
3514 /* Now flush device TLBs */
3515 list_for_each_entry(dev_data, &domain->dev_list, list) {
3516 struct amd_iommu *iommu;
3520 There might be non-IOMMUv2 capable devices in an IOMMUv2
3523 if (!dev_data->ats.enabled)
3526 qdep = dev_data->ats.qdep;
3527 iommu = amd_iommu_rlookup_table[dev_data->devid];
3529 build_inv_iotlb_pasid(&cmd, dev_data->devid, pasid,
3530 qdep, address, size);
3532 ret = iommu_queue_command(iommu, &cmd);
3537 /* Wait until all device TLBs are flushed */
3538 domain_flush_complete(domain);
3547 static int __amd_iommu_flush_page(struct protection_domain *domain, int pasid,
3550 return __flush_pasid(domain, pasid, address, false);
3553 int amd_iommu_flush_page(struct iommu_domain *dom, int pasid,
3556 struct protection_domain *domain = to_pdomain(dom);
3557 unsigned long flags;
3560 spin_lock_irqsave(&domain->lock, flags);
3561 ret = __amd_iommu_flush_page(domain, pasid, address);
3562 spin_unlock_irqrestore(&domain->lock, flags);
3566 EXPORT_SYMBOL(amd_iommu_flush_page);
3568 static int __amd_iommu_flush_tlb(struct protection_domain *domain, int pasid)
3570 return __flush_pasid(domain, pasid, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
3574 int amd_iommu_flush_tlb(struct iommu_domain *dom, int pasid)
3576 struct protection_domain *domain = to_pdomain(dom);
3577 unsigned long flags;
3580 spin_lock_irqsave(&domain->lock, flags);
3581 ret = __amd_iommu_flush_tlb(domain, pasid);
3582 spin_unlock_irqrestore(&domain->lock, flags);
3586 EXPORT_SYMBOL(amd_iommu_flush_tlb);
3588 static u64 *__get_gcr3_pte(u64 *root, int level, int pasid, bool alloc)
3595 index = (pasid >> (9 * level)) & 0x1ff;
3601 if (!(*pte & GCR3_VALID)) {
3605 root = (void *)get_zeroed_page(GFP_ATOMIC);
3609 *pte = __pa(root) | GCR3_VALID;
3612 root = __va(*pte & PAGE_MASK);
3620 static int __set_gcr3(struct protection_domain *domain, int pasid,
3625 if (domain->mode != PAGE_MODE_NONE)
3628 pte = __get_gcr3_pte(domain->gcr3_tbl, domain->glx, pasid, true);
3632 *pte = (cr3 & PAGE_MASK) | GCR3_VALID;
3634 return __amd_iommu_flush_tlb(domain, pasid);
3637 static int __clear_gcr3(struct protection_domain *domain, int pasid)
3641 if (domain->mode != PAGE_MODE_NONE)
3644 pte = __get_gcr3_pte(domain->gcr3_tbl, domain->glx, pasid, false);
3650 return __amd_iommu_flush_tlb(domain, pasid);
3653 int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
3656 struct protection_domain *domain = to_pdomain(dom);
3657 unsigned long flags;
3660 spin_lock_irqsave(&domain->lock, flags);
3661 ret = __set_gcr3(domain, pasid, cr3);
3662 spin_unlock_irqrestore(&domain->lock, flags);
3666 EXPORT_SYMBOL(amd_iommu_domain_set_gcr3);
3668 int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid)
3670 struct protection_domain *domain = to_pdomain(dom);
3671 unsigned long flags;
3674 spin_lock_irqsave(&domain->lock, flags);
3675 ret = __clear_gcr3(domain, pasid);
3676 spin_unlock_irqrestore(&domain->lock, flags);
3680 EXPORT_SYMBOL(amd_iommu_domain_clear_gcr3);
3682 int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid,
3683 int status, int tag)
3685 struct iommu_dev_data *dev_data;
3686 struct amd_iommu *iommu;
3687 struct iommu_cmd cmd;
3689 dev_data = get_dev_data(&pdev->dev);
3690 iommu = amd_iommu_rlookup_table[dev_data->devid];
3692 build_complete_ppr(&cmd, dev_data->devid, pasid, status,
3693 tag, dev_data->pri_tlp);
3695 return iommu_queue_command(iommu, &cmd);
3697 EXPORT_SYMBOL(amd_iommu_complete_ppr);
3699 struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev)
3701 struct protection_domain *pdomain;
3703 pdomain = get_domain(&pdev->dev);
3704 if (IS_ERR(pdomain))
3707 /* Only return IOMMUv2 domains */
3708 if (!(pdomain->flags & PD_IOMMUV2_MASK))
3711 return &pdomain->domain;
3713 EXPORT_SYMBOL(amd_iommu_get_v2_domain);
3715 void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum)
3717 struct iommu_dev_data *dev_data;
3719 if (!amd_iommu_v2_supported())
3722 dev_data = get_dev_data(&pdev->dev);
3723 dev_data->errata |= (1 << erratum);
3725 EXPORT_SYMBOL(amd_iommu_enable_device_erratum);
3727 int amd_iommu_device_info(struct pci_dev *pdev,
3728 struct amd_iommu_device_info *info)
3733 if (pdev == NULL || info == NULL)
3736 if (!amd_iommu_v2_supported())
3739 memset(info, 0, sizeof(*info));
3741 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ATS);
3743 info->flags |= AMD_IOMMU_DEVICE_FLAG_ATS_SUP;
3745 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
3747 info->flags |= AMD_IOMMU_DEVICE_FLAG_PRI_SUP;
3749 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PASID);
3753 max_pasids = 1 << (9 * (amd_iommu_max_glx_val + 1));
3754 max_pasids = min(max_pasids, (1 << 20));
3756 info->flags |= AMD_IOMMU_DEVICE_FLAG_PASID_SUP;
3757 info->max_pasids = min(pci_max_pasids(pdev), max_pasids);
3759 features = pci_pasid_features(pdev);
3760 if (features & PCI_PASID_CAP_EXEC)
3761 info->flags |= AMD_IOMMU_DEVICE_FLAG_EXEC_SUP;
3762 if (features & PCI_PASID_CAP_PRIV)
3763 info->flags |= AMD_IOMMU_DEVICE_FLAG_PRIV_SUP;
3768 EXPORT_SYMBOL(amd_iommu_device_info);
3770 #ifdef CONFIG_IRQ_REMAP
3772 /*****************************************************************************
3774 * Interrupt Remapping Implementation
3776 *****************************************************************************/
3778 static struct irq_chip amd_ir_chip;
3780 #define DTE_IRQ_PHYS_ADDR_MASK (((1ULL << 45)-1) << 6)
3781 #define DTE_IRQ_REMAP_INTCTL (2ULL << 60)
3782 #define DTE_IRQ_TABLE_LEN (8ULL << 1)
3783 #define DTE_IRQ_REMAP_ENABLE 1ULL
3785 static void set_dte_irq_entry(u16 devid, struct irq_remap_table *table)
3789 dte = amd_iommu_dev_table[devid].data[2];
3790 dte &= ~DTE_IRQ_PHYS_ADDR_MASK;
3791 dte |= virt_to_phys(table->table);
3792 dte |= DTE_IRQ_REMAP_INTCTL;
3793 dte |= DTE_IRQ_TABLE_LEN;
3794 dte |= DTE_IRQ_REMAP_ENABLE;
3796 amd_iommu_dev_table[devid].data[2] = dte;
3799 static struct irq_remap_table *get_irq_table(u16 devid, bool ioapic)
3801 struct irq_remap_table *table = NULL;
3802 struct amd_iommu *iommu;
3803 unsigned long flags;
3806 write_lock_irqsave(&amd_iommu_devtable_lock, flags);
3808 iommu = amd_iommu_rlookup_table[devid];
3812 table = irq_lookup_table[devid];
3816 alias = amd_iommu_alias_table[devid];
3817 table = irq_lookup_table[alias];
3819 irq_lookup_table[devid] = table;
3820 set_dte_irq_entry(devid, table);
3821 iommu_flush_dte(iommu, devid);
3825 /* Nothing there yet, allocate new irq remapping table */
3826 table = kzalloc(sizeof(*table), GFP_ATOMIC);
3830 /* Initialize table spin-lock */
3831 spin_lock_init(&table->lock);
3834 /* Keep the first 32 indexes free for IOAPIC interrupts */
3835 table->min_index = 32;
3837 table->table = kmem_cache_alloc(amd_iommu_irq_cache, GFP_ATOMIC);
3838 if (!table->table) {
3844 if (!AMD_IOMMU_GUEST_IR_GA(amd_iommu_guest_ir))
3845 memset(table->table, 0,
3846 MAX_IRQS_PER_TABLE * sizeof(u32));
3848 memset(table->table, 0,
3849 (MAX_IRQS_PER_TABLE * (sizeof(u64) * 2)));
3854 for (i = 0; i < 32; ++i)
3855 iommu->irte_ops->set_allocated(table, i);
3858 irq_lookup_table[devid] = table;
3859 set_dte_irq_entry(devid, table);
3860 iommu_flush_dte(iommu, devid);
3861 if (devid != alias) {
3862 irq_lookup_table[alias] = table;
3863 set_dte_irq_entry(alias, table);
3864 iommu_flush_dte(iommu, alias);
3868 iommu_completion_wait(iommu);
3871 write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
3876 static int alloc_irq_index(u16 devid, int count)
3878 struct irq_remap_table *table;
3879 unsigned long flags;
3881 struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
3886 table = get_irq_table(devid, false);
3890 spin_lock_irqsave(&table->lock, flags);
3892 /* Scan table for free entries */
3893 for (c = 0, index = table->min_index;
3894 index < MAX_IRQS_PER_TABLE;
3896 if (!iommu->irte_ops->is_allocated(table, index))
3903 iommu->irte_ops->set_allocated(table, index - c + 1);
3913 spin_unlock_irqrestore(&table->lock, flags);
3918 static int modify_irte_ga(u16 devid, int index, struct irte_ga *irte,
3919 struct amd_ir_data *data)
3921 struct irq_remap_table *table;
3922 struct amd_iommu *iommu;
3923 unsigned long flags;
3924 struct irte_ga *entry;
3926 iommu = amd_iommu_rlookup_table[devid];
3930 table = get_irq_table(devid, false);
3934 spin_lock_irqsave(&table->lock, flags);
3936 entry = (struct irte_ga *)table->table;
3937 entry = &entry[index];
3938 entry->lo.fields_remap.valid = 0;
3939 entry->hi.val = irte->hi.val;
3940 entry->lo.val = irte->lo.val;
3941 entry->lo.fields_remap.valid = 1;
3945 spin_unlock_irqrestore(&table->lock, flags);
3947 iommu_flush_irt(iommu, devid);
3948 iommu_completion_wait(iommu);
3953 static int modify_irte(u16 devid, int index, union irte *irte)
3955 struct irq_remap_table *table;
3956 struct amd_iommu *iommu;
3957 unsigned long flags;
3959 iommu = amd_iommu_rlookup_table[devid];
3963 table = get_irq_table(devid, false);
3967 spin_lock_irqsave(&table->lock, flags);
3968 table->table[index] = irte->val;
3969 spin_unlock_irqrestore(&table->lock, flags);
3971 iommu_flush_irt(iommu, devid);
3972 iommu_completion_wait(iommu);
3977 static void free_irte(u16 devid, int index)
3979 struct irq_remap_table *table;
3980 struct amd_iommu *iommu;
3981 unsigned long flags;
3983 iommu = amd_iommu_rlookup_table[devid];
3987 table = get_irq_table(devid, false);
3991 spin_lock_irqsave(&table->lock, flags);
3992 iommu->irte_ops->clear_allocated(table, index);
3993 spin_unlock_irqrestore(&table->lock, flags);
3995 iommu_flush_irt(iommu, devid);
3996 iommu_completion_wait(iommu);
3999 static void irte_prepare(void *entry,
4000 u32 delivery_mode, u32 dest_mode,
4001 u8 vector, u32 dest_apicid, int devid)
4003 union irte *irte = (union irte *) entry;
4006 irte->fields.vector = vector;
4007 irte->fields.int_type = delivery_mode;
4008 irte->fields.destination = dest_apicid;
4009 irte->fields.dm = dest_mode;
4010 irte->fields.valid = 1;
4013 static void irte_ga_prepare(void *entry,
4014 u32 delivery_mode, u32 dest_mode,
4015 u8 vector, u32 dest_apicid, int devid)
4017 struct irte_ga *irte = (struct irte_ga *) entry;
4021 irte->lo.fields_remap.int_type = delivery_mode;
4022 irte->lo.fields_remap.dm = dest_mode;
4023 irte->hi.fields.vector = vector;
4024 irte->lo.fields_remap.destination = dest_apicid;
4025 irte->lo.fields_remap.valid = 1;
4028 static void irte_activate(void *entry, u16 devid, u16 index)
4030 union irte *irte = (union irte *) entry;
4032 irte->fields.valid = 1;
4033 modify_irte(devid, index, irte);
4036 static void irte_ga_activate(void *entry, u16 devid, u16 index)
4038 struct irte_ga *irte = (struct irte_ga *) entry;
4040 irte->lo.fields_remap.valid = 1;
4041 modify_irte_ga(devid, index, irte, NULL);
4044 static void irte_deactivate(void *entry, u16 devid, u16 index)
4046 union irte *irte = (union irte *) entry;
4048 irte->fields.valid = 0;
4049 modify_irte(devid, index, irte);
4052 static void irte_ga_deactivate(void *entry, u16 devid, u16 index)
4054 struct irte_ga *irte = (struct irte_ga *) entry;
4056 irte->lo.fields_remap.valid = 0;
4057 modify_irte_ga(devid, index, irte, NULL);
4060 static void irte_set_affinity(void *entry, u16 devid, u16 index,
4061 u8 vector, u32 dest_apicid)
4063 union irte *irte = (union irte *) entry;
4065 irte->fields.vector = vector;
4066 irte->fields.destination = dest_apicid;
4067 modify_irte(devid, index, irte);
4070 static void irte_ga_set_affinity(void *entry, u16 devid, u16 index,
4071 u8 vector, u32 dest_apicid)
4073 struct irte_ga *irte = (struct irte_ga *) entry;
4074 struct iommu_dev_data *dev_data = search_dev_data(devid);
4076 if (!dev_data || !dev_data->use_vapic ||
4077 !irte->lo.fields_remap.guest_mode) {
4078 irte->hi.fields.vector = vector;
4079 irte->lo.fields_remap.destination = dest_apicid;
4080 modify_irte_ga(devid, index, irte, NULL);
4084 #define IRTE_ALLOCATED (~1U)
4085 static void irte_set_allocated(struct irq_remap_table *table, int index)
4087 table->table[index] = IRTE_ALLOCATED;
4090 static void irte_ga_set_allocated(struct irq_remap_table *table, int index)
4092 struct irte_ga *ptr = (struct irte_ga *)table->table;
4093 struct irte_ga *irte = &ptr[index];
4095 memset(&irte->lo.val, 0, sizeof(u64));
4096 memset(&irte->hi.val, 0, sizeof(u64));
4097 irte->hi.fields.vector = 0xff;
4100 static bool irte_is_allocated(struct irq_remap_table *table, int index)
4102 union irte *ptr = (union irte *)table->table;
4103 union irte *irte = &ptr[index];
4105 return irte->val != 0;
4108 static bool irte_ga_is_allocated(struct irq_remap_table *table, int index)
4110 struct irte_ga *ptr = (struct irte_ga *)table->table;
4111 struct irte_ga *irte = &ptr[index];
4113 return irte->hi.fields.vector != 0;
4116 static void irte_clear_allocated(struct irq_remap_table *table, int index)
4118 table->table[index] = 0;
4121 static void irte_ga_clear_allocated(struct irq_remap_table *table, int index)
4123 struct irte_ga *ptr = (struct irte_ga *)table->table;
4124 struct irte_ga *irte = &ptr[index];
4126 memset(&irte->lo.val, 0, sizeof(u64));
4127 memset(&irte->hi.val, 0, sizeof(u64));
4130 static int get_devid(struct irq_alloc_info *info)
4134 switch (info->type) {
4135 case X86_IRQ_ALLOC_TYPE_IOAPIC:
4136 devid = get_ioapic_devid(info->ioapic_id);
4138 case X86_IRQ_ALLOC_TYPE_HPET:
4139 devid = get_hpet_devid(info->hpet_id);
4141 case X86_IRQ_ALLOC_TYPE_MSI:
4142 case X86_IRQ_ALLOC_TYPE_MSIX:
4143 devid = get_device_id(&info->msi_dev->dev);
4153 static struct irq_domain *get_ir_irq_domain(struct irq_alloc_info *info)
4155 struct amd_iommu *iommu;
4161 devid = get_devid(info);
4163 iommu = amd_iommu_rlookup_table[devid];
4165 return iommu->ir_domain;
4171 static struct irq_domain *get_irq_domain(struct irq_alloc_info *info)
4173 struct amd_iommu *iommu;
4179 switch (info->type) {
4180 case X86_IRQ_ALLOC_TYPE_MSI:
4181 case X86_IRQ_ALLOC_TYPE_MSIX:
4182 devid = get_device_id(&info->msi_dev->dev);
4186 iommu = amd_iommu_rlookup_table[devid];
4188 return iommu->msi_domain;
4197 struct irq_remap_ops amd_iommu_irq_ops = {
4198 .prepare = amd_iommu_prepare,
4199 .enable = amd_iommu_enable,
4200 .disable = amd_iommu_disable,
4201 .reenable = amd_iommu_reenable,
4202 .enable_faulting = amd_iommu_enable_faulting,
4203 .get_ir_irq_domain = get_ir_irq_domain,
4204 .get_irq_domain = get_irq_domain,
4207 static void irq_remapping_prepare_irte(struct amd_ir_data *data,
4208 struct irq_cfg *irq_cfg,
4209 struct irq_alloc_info *info,
4210 int devid, int index, int sub_handle)
4212 struct irq_2_irte *irte_info = &data->irq_2_irte;
4213 struct msi_msg *msg = &data->msi_entry;
4214 struct IO_APIC_route_entry *entry;
4215 struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
4220 data->irq_2_irte.devid = devid;
4221 data->irq_2_irte.index = index + sub_handle;
4222 iommu->irte_ops->prepare(data->entry, apic->irq_delivery_mode,
4223 apic->irq_dest_mode, irq_cfg->vector,
4224 irq_cfg->dest_apicid, devid);
4226 switch (info->type) {
4227 case X86_IRQ_ALLOC_TYPE_IOAPIC:
4228 /* Setup IOAPIC entry */
4229 entry = info->ioapic_entry;
4230 info->ioapic_entry = NULL;
4231 memset(entry, 0, sizeof(*entry));
4232 entry->vector = index;
4234 entry->trigger = info->ioapic_trigger;
4235 entry->polarity = info->ioapic_polarity;
4236 /* Mask level triggered irqs. */
4237 if (info->ioapic_trigger)
4241 case X86_IRQ_ALLOC_TYPE_HPET:
4242 case X86_IRQ_ALLOC_TYPE_MSI:
4243 case X86_IRQ_ALLOC_TYPE_MSIX:
4244 msg->address_hi = MSI_ADDR_BASE_HI;
4245 msg->address_lo = MSI_ADDR_BASE_LO;
4246 msg->data = irte_info->index;
4255 struct amd_irte_ops irte_32_ops = {
4256 .prepare = irte_prepare,
4257 .activate = irte_activate,
4258 .deactivate = irte_deactivate,
4259 .set_affinity = irte_set_affinity,
4260 .set_allocated = irte_set_allocated,
4261 .is_allocated = irte_is_allocated,
4262 .clear_allocated = irte_clear_allocated,
4265 struct amd_irte_ops irte_128_ops = {
4266 .prepare = irte_ga_prepare,
4267 .activate = irte_ga_activate,
4268 .deactivate = irte_ga_deactivate,
4269 .set_affinity = irte_ga_set_affinity,
4270 .set_allocated = irte_ga_set_allocated,
4271 .is_allocated = irte_ga_is_allocated,
4272 .clear_allocated = irte_ga_clear_allocated,
4275 static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
4276 unsigned int nr_irqs, void *arg)
4278 struct irq_alloc_info *info = arg;
4279 struct irq_data *irq_data;
4280 struct amd_ir_data *data = NULL;
4281 struct irq_cfg *cfg;
4287 if (nr_irqs > 1 && info->type != X86_IRQ_ALLOC_TYPE_MSI &&
4288 info->type != X86_IRQ_ALLOC_TYPE_MSIX)
4292 * With IRQ remapping enabled, don't need contiguous CPU vectors
4293 * to support multiple MSI interrupts.
4295 if (info->type == X86_IRQ_ALLOC_TYPE_MSI)
4296 info->flags &= ~X86_IRQ_ALLOC_CONTIGUOUS_VECTORS;
4298 devid = get_devid(info);
4302 ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg);
4306 if (info->type == X86_IRQ_ALLOC_TYPE_IOAPIC) {
4307 if (get_irq_table(devid, true))
4308 index = info->ioapic_pin;
4312 index = alloc_irq_index(devid, nr_irqs);
4315 pr_warn("Failed to allocate IRTE\n");
4317 goto out_free_parent;
4320 for (i = 0; i < nr_irqs; i++) {
4321 irq_data = irq_domain_get_irq_data(domain, virq + i);
4322 cfg = irqd_cfg(irq_data);
4323 if (!irq_data || !cfg) {
4329 data = kzalloc(sizeof(*data), GFP_KERNEL);
4333 if (!AMD_IOMMU_GUEST_IR_GA(amd_iommu_guest_ir))
4334 data->entry = kzalloc(sizeof(union irte), GFP_KERNEL);
4336 data->entry = kzalloc(sizeof(struct irte_ga),
4343 irq_data->hwirq = (devid << 16) + i;
4344 irq_data->chip_data = data;
4345 irq_data->chip = &amd_ir_chip;
4346 irq_remapping_prepare_irte(data, cfg, info, devid, index, i);
4347 irq_set_status_flags(virq + i, IRQ_MOVE_PCNTXT);
4353 for (i--; i >= 0; i--) {
4354 irq_data = irq_domain_get_irq_data(domain, virq + i);
4356 kfree(irq_data->chip_data);
4358 for (i = 0; i < nr_irqs; i++)
4359 free_irte(devid, index + i);
4361 irq_domain_free_irqs_common(domain, virq, nr_irqs);
4365 static void irq_remapping_free(struct irq_domain *domain, unsigned int virq,
4366 unsigned int nr_irqs)
4368 struct irq_2_irte *irte_info;
4369 struct irq_data *irq_data;
4370 struct amd_ir_data *data;
4373 for (i = 0; i < nr_irqs; i++) {
4374 irq_data = irq_domain_get_irq_data(domain, virq + i);
4375 if (irq_data && irq_data->chip_data) {
4376 data = irq_data->chip_data;
4377 irte_info = &data->irq_2_irte;
4378 free_irte(irte_info->devid, irte_info->index);
4383 irq_domain_free_irqs_common(domain, virq, nr_irqs);
4386 static void irq_remapping_activate(struct irq_domain *domain,
4387 struct irq_data *irq_data)
4389 struct amd_ir_data *data = irq_data->chip_data;
4390 struct irq_2_irte *irte_info = &data->irq_2_irte;
4391 struct amd_iommu *iommu = amd_iommu_rlookup_table[irte_info->devid];
4394 iommu->irte_ops->activate(data->entry, irte_info->devid,
4398 static void irq_remapping_deactivate(struct irq_domain *domain,
4399 struct irq_data *irq_data)
4401 struct amd_ir_data *data = irq_data->chip_data;
4402 struct irq_2_irte *irte_info = &data->irq_2_irte;
4403 struct amd_iommu *iommu = amd_iommu_rlookup_table[irte_info->devid];
4406 iommu->irte_ops->deactivate(data->entry, irte_info->devid,
4410 static const struct irq_domain_ops amd_ir_domain_ops = {
4411 .alloc = irq_remapping_alloc,
4412 .free = irq_remapping_free,
4413 .activate = irq_remapping_activate,
4414 .deactivate = irq_remapping_deactivate,
4417 static int amd_ir_set_vcpu_affinity(struct irq_data *data, void *vcpu_info)
4419 struct amd_iommu *iommu;
4420 struct amd_iommu_pi_data *pi_data = vcpu_info;
4421 struct vcpu_data *vcpu_pi_info = pi_data->vcpu_data;
4422 struct amd_ir_data *ir_data = data->chip_data;
4423 struct irte_ga *irte = (struct irte_ga *) ir_data->entry;
4424 struct irq_2_irte *irte_info = &ir_data->irq_2_irte;
4425 struct iommu_dev_data *dev_data = search_dev_data(irte_info->devid);
4428 * This device has never been set up for guest mode.
4429 * we should not modify the IRTE
4431 if (!dev_data || !dev_data->use_vapic)
4434 pi_data->ir_data = ir_data;
4437 * SVM tries to set up for VAPIC mode, but we are in
4438 * legacy mode. So, we force legacy mode instead.
4440 if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir)) {
4441 pr_debug("AMD-Vi: %s: Fall back to using intr legacy remap\n",
4443 pi_data->is_guest_mode = false;
4446 iommu = amd_iommu_rlookup_table[irte_info->devid];
4450 pi_data->prev_ga_tag = ir_data->cached_ga_tag;
4451 if (pi_data->is_guest_mode) {
4453 irte->hi.fields.ga_root_ptr = (pi_data->base >> 12);
4454 irte->hi.fields.vector = vcpu_pi_info->vector;
4455 irte->lo.fields_vapic.guest_mode = 1;
4456 irte->lo.fields_vapic.ga_tag = pi_data->ga_tag;
4458 ir_data->cached_ga_tag = pi_data->ga_tag;
4461 struct irq_cfg *cfg = irqd_cfg(data);
4465 irte->hi.fields.vector = cfg->vector;
4466 irte->lo.fields_remap.guest_mode = 0;
4467 irte->lo.fields_remap.destination = cfg->dest_apicid;
4468 irte->lo.fields_remap.int_type = apic->irq_delivery_mode;
4469 irte->lo.fields_remap.dm = apic->irq_dest_mode;
4472 * This communicates the ga_tag back to the caller
4473 * so that it can do all the necessary clean up.
4475 ir_data->cached_ga_tag = 0;
4478 return modify_irte_ga(irte_info->devid, irte_info->index, irte, ir_data);
4481 static int amd_ir_set_affinity(struct irq_data *data,
4482 const struct cpumask *mask, bool force)
4484 struct amd_ir_data *ir_data = data->chip_data;
4485 struct irq_2_irte *irte_info = &ir_data->irq_2_irte;
4486 struct irq_cfg *cfg = irqd_cfg(data);
4487 struct irq_data *parent = data->parent_data;
4488 struct amd_iommu *iommu = amd_iommu_rlookup_table[irte_info->devid];
4494 ret = parent->chip->irq_set_affinity(parent, mask, force);
4495 if (ret < 0 || ret == IRQ_SET_MASK_OK_DONE)
4499 * Atomically updates the IRTE with the new destination, vector
4500 * and flushes the interrupt entry cache.
4502 iommu->irte_ops->set_affinity(ir_data->entry, irte_info->devid,
4503 irte_info->index, cfg->vector, cfg->dest_apicid);
4506 * After this point, all the interrupts will start arriving
4507 * at the new destination. So, time to cleanup the previous
4508 * vector allocation.
4510 send_cleanup_vector(cfg);
4512 return IRQ_SET_MASK_OK_DONE;
4515 static void ir_compose_msi_msg(struct irq_data *irq_data, struct msi_msg *msg)
4517 struct amd_ir_data *ir_data = irq_data->chip_data;
4519 *msg = ir_data->msi_entry;
4522 static struct irq_chip amd_ir_chip = {
4524 .irq_ack = ir_ack_apic_edge,
4525 .irq_set_affinity = amd_ir_set_affinity,
4526 .irq_set_vcpu_affinity = amd_ir_set_vcpu_affinity,
4527 .irq_compose_msi_msg = ir_compose_msi_msg,
4530 int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
4532 struct fwnode_handle *fn;
4534 fn = irq_domain_alloc_named_id_fwnode("AMD-IR", iommu->index);
4537 iommu->ir_domain = irq_domain_create_tree(fn, &amd_ir_domain_ops, iommu);
4538 irq_domain_free_fwnode(fn);
4539 if (!iommu->ir_domain)
4542 iommu->ir_domain->parent = arch_get_ir_parent_domain();
4543 iommu->msi_domain = arch_create_remap_msi_irq_domain(iommu->ir_domain,
4549 int amd_iommu_update_ga(int cpu, bool is_run, void *data)
4551 unsigned long flags;
4552 struct amd_iommu *iommu;
4553 struct irq_remap_table *irt;
4554 struct amd_ir_data *ir_data = (struct amd_ir_data *)data;
4555 int devid = ir_data->irq_2_irte.devid;
4556 struct irte_ga *entry = (struct irte_ga *) ir_data->entry;
4557 struct irte_ga *ref = (struct irte_ga *) ir_data->ref;
4559 if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) ||
4560 !ref || !entry || !entry->lo.fields_vapic.guest_mode)
4563 iommu = amd_iommu_rlookup_table[devid];
4567 irt = get_irq_table(devid, false);
4571 spin_lock_irqsave(&irt->lock, flags);
4573 if (ref->lo.fields_vapic.guest_mode) {
4575 ref->lo.fields_vapic.destination = cpu;
4576 ref->lo.fields_vapic.is_run = is_run;
4580 spin_unlock_irqrestore(&irt->lock, flags);
4582 iommu_flush_irt(iommu, devid);
4583 iommu_completion_wait(iommu);
4586 EXPORT_SYMBOL(amd_iommu_update_ga);