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author | Joerg Roedel <jroedel@suse.de> | 2017-08-17 16:31:27 +0200 |
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committer | Joerg Roedel <jroedel@suse.de> | 2017-08-17 16:31:27 +0200 |
commit | fa94cf84af20d179e04eab429cfec9d91922111d (patch) | |
tree | 87936b77ca8e67277fad1132077e7d2f047bb720 | |
parent | ef954844c7ace62f773f4f23e28d2d915adc419f (diff) | |
parent | 13cf01744608e1dc3f13dd316c95cb7a1fdaf740 (diff) | |
download | linux-stable-fa94cf84af20d179e04eab429cfec9d91922111d.tar.gz linux-stable-fa94cf84af20d179e04eab429cfec9d91922111d.tar.bz2 linux-stable-fa94cf84af20d179e04eab429cfec9d91922111d.zip |
Merge branch 'core' into arm/tegra
-rw-r--r-- | drivers/iommu/amd_iommu.c | 229 | ||||
-rw-r--r-- | drivers/iommu/dmar.c | 2 | ||||
-rw-r--r-- | drivers/iommu/fsl_pamu.c | 20 | ||||
-rw-r--r-- | drivers/iommu/fsl_pamu_domain.c | 10 | ||||
-rw-r--r-- | drivers/iommu/intel-iommu.c | 197 | ||||
-rw-r--r-- | drivers/iommu/iommu.c | 19 | ||||
-rw-r--r-- | drivers/iommu/iova.c | 183 | ||||
-rw-r--r-- | drivers/iommu/msm_iommu.c | 15 | ||||
-rw-r--r-- | drivers/iommu/of_iommu.c | 144 | ||||
-rw-r--r-- | drivers/iommu/rockchip-iommu.c | 10 | ||||
-rw-r--r-- | drivers/iommu/tegra-gart.c | 19 | ||||
-rw-r--r-- | drivers/iommu/tegra-smmu.c | 9 | ||||
-rw-r--r-- | include/linux/iommu.h | 4 | ||||
-rw-r--r-- | include/linux/iova.h | 67 |
14 files changed, 429 insertions, 499 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 354cbd6392cd..5a61cf5a4443 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -137,20 +137,7 @@ struct kmem_cache *amd_iommu_irq_cache; static void update_domain(struct protection_domain *domain); static int protection_domain_init(struct protection_domain *domain); static void detach_device(struct device *dev); - -#define FLUSH_QUEUE_SIZE 256 - -struct flush_queue_entry { - unsigned long iova_pfn; - unsigned long pages; - u64 counter; /* Flush counter when this entry was added to the queue */ -}; - -struct flush_queue { - struct flush_queue_entry *entries; - unsigned head, tail; - spinlock_t lock; -}; +static void iova_domain_flush_tlb(struct iova_domain *iovad); /* * Data container for a dma_ops specific protection domain @@ -161,36 +148,6 @@ struct dma_ops_domain { /* IOVA RB-Tree */ struct iova_domain iovad; - - struct flush_queue __percpu *flush_queue; - - /* - * We need two counter here to be race-free wrt. IOTLB flushing and - * adding entries to the flush queue. - * - * The flush_start_cnt is incremented _before_ the IOTLB flush starts. - * New entries added to the flush ring-buffer get their 'counter' value - * from here. This way we can make sure that entries added to the queue - * (or other per-cpu queues of the same domain) while the TLB is about - * to be flushed are not considered to be flushed already. - */ - atomic64_t flush_start_cnt; - - /* - * The flush_finish_cnt is incremented when an IOTLB flush is complete. - * This value is always smaller than flush_start_cnt. The queue_add - * function frees all IOVAs that have a counter value smaller than - * flush_finish_cnt. This makes sure that we only free IOVAs that are - * flushed out of the IOTLB of the domain. - */ - atomic64_t flush_finish_cnt; - - /* - * Timer to make sure we don't keep IOVAs around unflushed - * for too long - */ - struct timer_list flush_timer; - atomic_t flush_timer_on; }; static struct iova_domain reserved_iova_ranges; @@ -1788,178 +1745,19 @@ static void free_gcr3_table(struct protection_domain *domain) free_page((unsigned long)domain->gcr3_tbl); } -static void dma_ops_domain_free_flush_queue(struct dma_ops_domain *dom) -{ - int cpu; - - for_each_possible_cpu(cpu) { - struct flush_queue *queue; - - queue = per_cpu_ptr(dom->flush_queue, cpu); - kfree(queue->entries); - } - - free_percpu(dom->flush_queue); - - dom->flush_queue = NULL; -} - -static int dma_ops_domain_alloc_flush_queue(struct dma_ops_domain *dom) -{ - int cpu; - - atomic64_set(&dom->flush_start_cnt, 0); - atomic64_set(&dom->flush_finish_cnt, 0); - - dom->flush_queue = alloc_percpu(struct flush_queue); - if (!dom->flush_queue) - return -ENOMEM; - - /* First make sure everything is cleared */ - for_each_possible_cpu(cpu) { - struct flush_queue *queue; - - queue = per_cpu_ptr(dom->flush_queue, cpu); - queue->head = 0; - queue->tail = 0; - queue->entries = NULL; - } - - /* Now start doing the allocation */ - for_each_possible_cpu(cpu) { - struct flush_queue *queue; - - queue = per_cpu_ptr(dom->flush_queue, cpu); - queue->entries = kzalloc(FLUSH_QUEUE_SIZE * sizeof(*queue->entries), - GFP_KERNEL); - if (!queue->entries) { - dma_ops_domain_free_flush_queue(dom); - return -ENOMEM; - } - - spin_lock_init(&queue->lock); - } - - return 0; -} - static void dma_ops_domain_flush_tlb(struct dma_ops_domain *dom) { - atomic64_inc(&dom->flush_start_cnt); domain_flush_tlb(&dom->domain); domain_flush_complete(&dom->domain); - atomic64_inc(&dom->flush_finish_cnt); } -static inline bool queue_ring_full(struct flush_queue *queue) +static void iova_domain_flush_tlb(struct iova_domain *iovad) { - assert_spin_locked(&queue->lock); - - return (((queue->tail + 1) % FLUSH_QUEUE_SIZE) == queue->head); -} + struct dma_ops_domain *dom; -#define queue_ring_for_each(i, q) \ - for (i = (q)->head; i != (q)->tail; i = (i + 1) % FLUSH_QUEUE_SIZE) - -static inline unsigned queue_ring_add(struct flush_queue *queue) -{ - unsigned idx = queue->tail; - - assert_spin_locked(&queue->lock); - queue->tail = (idx + 1) % FLUSH_QUEUE_SIZE; - - return idx; -} - -static inline void queue_ring_remove_head(struct flush_queue *queue) -{ - assert_spin_locked(&queue->lock); - queue->head = (queue->head + 1) % FLUSH_QUEUE_SIZE; -} - -static void queue_ring_free_flushed(struct dma_ops_domain *dom, - struct flush_queue *queue) -{ - u64 counter = atomic64_read(&dom->flush_finish_cnt); - int idx; - - queue_ring_for_each(idx, queue) { - /* - * This assumes that counter values in the ring-buffer are - * monotonously rising. - */ - if (queue->entries[idx].counter >= counter) - break; - - free_iova_fast(&dom->iovad, - queue->entries[idx].iova_pfn, - queue->entries[idx].pages); - - queue_ring_remove_head(queue); - } -} - -static void queue_add(struct dma_ops_domain *dom, - unsigned long address, unsigned long pages) -{ - struct flush_queue *queue; - unsigned long flags; - int idx; - - pages = __roundup_pow_of_two(pages); - address >>= PAGE_SHIFT; - - queue = get_cpu_ptr(dom->flush_queue); - spin_lock_irqsave(&queue->lock, flags); - - /* - * First remove the enries from the ring-buffer that are already - * flushed to make the below queue_ring_full() check less likely - */ - queue_ring_free_flushed(dom, queue); - - /* - * When ring-queue is full, flush the entries from the IOTLB so - * that we can free all entries with queue_ring_free_flushed() - * below. - */ - if (queue_ring_full(queue)) { - dma_ops_domain_flush_tlb(dom); - queue_ring_free_flushed(dom, queue); - } - - idx = queue_ring_add(queue); - - queue->entries[idx].iova_pfn = address; - queue->entries[idx].pages = pages; - queue->entries[idx].counter = atomic64_read(&dom->flush_start_cnt); - - spin_unlock_irqrestore(&queue->lock, flags); - - if (atomic_cmpxchg(&dom->flush_timer_on, 0, 1) == 0) - mod_timer(&dom->flush_timer, jiffies + msecs_to_jiffies(10)); - - put_cpu_ptr(dom->flush_queue); -} - -static void queue_flush_timeout(unsigned long data) -{ - struct dma_ops_domain *dom = (struct dma_ops_domain *)data; - int cpu; - - atomic_set(&dom->flush_timer_on, 0); + dom = container_of(iovad, struct dma_ops_domain, iovad); dma_ops_domain_flush_tlb(dom); - - for_each_possible_cpu(cpu) { - struct flush_queue *queue; - unsigned long flags; - - queue = per_cpu_ptr(dom->flush_queue, cpu); - spin_lock_irqsave(&queue->lock, flags); - queue_ring_free_flushed(dom, queue); - spin_unlock_irqrestore(&queue->lock, flags); - } } /* @@ -1973,11 +1771,6 @@ static void dma_ops_domain_free(struct dma_ops_domain *dom) del_domain_from_list(&dom->domain); - if (timer_pending(&dom->flush_timer)) - del_timer(&dom->flush_timer); - - dma_ops_domain_free_flush_queue(dom); - put_iova_domain(&dom->iovad); free_pagetable(&dom->domain); @@ -2013,16 +1806,11 @@ static struct dma_ops_domain *dma_ops_domain_alloc(void) init_iova_domain(&dma_dom->iovad, PAGE_SIZE, IOVA_START_PFN, DMA_32BIT_PFN); - /* Initialize reserved ranges */ - copy_reserved_iova(&reserved_iova_ranges, &dma_dom->iovad); - - if (dma_ops_domain_alloc_flush_queue(dma_dom)) + if (init_iova_flush_queue(&dma_dom->iovad, iova_domain_flush_tlb, NULL)) goto free_dma_dom; - setup_timer(&dma_dom->flush_timer, queue_flush_timeout, - (unsigned long)dma_dom); - - atomic_set(&dma_dom->flush_timer_on, 0); + /* Initialize reserved ranges */ + copy_reserved_iova(&reserved_iova_ranges, &dma_dom->iovad); add_domain_to_list(&dma_dom->domain); @@ -2619,7 +2407,8 @@ static void __unmap_single(struct dma_ops_domain *dma_dom, domain_flush_tlb(&dma_dom->domain); domain_flush_complete(&dma_dom->domain); } else { - queue_add(dma_dom, dma_addr, pages); + pages = __roundup_pow_of_two(pages); + queue_iova(&dma_dom->iovad, dma_addr >> PAGE_SHIFT, pages, 0); } } diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index c8b0329c85d2..ca5ebaeafd6a 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1343,7 +1343,7 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep, if (mask) { BUG_ON(addr & ((1 << (VTD_PAGE_SHIFT + mask)) - 1)); - addr |= (1 << (VTD_PAGE_SHIFT + mask - 1)) - 1; + addr |= (1ULL << (VTD_PAGE_SHIFT + mask - 1)) - 1; desc.high = QI_DEV_IOTLB_ADDR(addr) | QI_DEV_IOTLB_SIZE; } else desc.high = QI_DEV_IOTLB_ADDR(addr); diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c index a34355fca37a..919ad9045ac4 100644 --- a/drivers/iommu/fsl_pamu.c +++ b/drivers/iommu/fsl_pamu.c @@ -530,8 +530,8 @@ u32 get_stash_id(u32 stash_dest_hint, u32 vcpu) if (node) { prop = of_get_property(node, "cache-stash-id", NULL); if (!prop) { - pr_debug("missing cache-stash-id at %s\n", - node->full_name); + pr_debug("missing cache-stash-id at %pOF\n", + node); of_node_put(node); return ~(u32)0; } @@ -557,8 +557,8 @@ found_cpu_node: if (stash_dest_hint == cache_level) { prop = of_get_property(node, "cache-stash-id", NULL); if (!prop) { - pr_debug("missing cache-stash-id at %s\n", - node->full_name); + pr_debug("missing cache-stash-id at %pOF\n", + node); of_node_put(node); return ~(u32)0; } @@ -568,8 +568,7 @@ found_cpu_node: prop = of_get_property(node, "next-level-cache", NULL); if (!prop) { - pr_debug("can't find next-level-cache at %s\n", - node->full_name); + pr_debug("can't find next-level-cache at %pOF\n", node); of_node_put(node); return ~(u32)0; /* can't traverse any further */ } @@ -1063,8 +1062,7 @@ static int fsl_pamu_probe(struct platform_device *pdev) guts_node = of_find_matching_node(NULL, guts_device_ids); if (!guts_node) { - dev_err(dev, "could not find GUTS node %s\n", - dev->of_node->full_name); + dev_err(dev, "could not find GUTS node %pOF\n", dev->of_node); ret = -ENODEV; goto error; } @@ -1246,8 +1244,7 @@ static __init int fsl_pamu_init(void) pdev = platform_device_alloc("fsl-of-pamu", 0); if (!pdev) { - pr_err("could not allocate device %s\n", - np->full_name); + pr_err("could not allocate device %pOF\n", np); ret = -ENOMEM; goto error_device_alloc; } @@ -1259,8 +1256,7 @@ static __init int fsl_pamu_init(void) ret = platform_device_add(pdev); if (ret) { - pr_err("could not add device %s (err=%i)\n", - np->full_name, ret); + pr_err("could not add device %pOF (err=%i)\n", np, ret); goto error_device_add; } diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c index da0e1e30ef37..01c73479345d 100644 --- a/drivers/iommu/fsl_pamu_domain.c +++ b/drivers/iommu/fsl_pamu_domain.c @@ -619,8 +619,8 @@ static int handle_attach_device(struct fsl_dma_domain *dma_domain, for (i = 0; i < num; i++) { /* Ensure that LIODN value is valid */ if (liodn[i] >= PAACE_NUMBER_ENTRIES) { - pr_debug("Invalid liodn %d, attach device failed for %s\n", - liodn[i], dev->of_node->full_name); + pr_debug("Invalid liodn %d, attach device failed for %pOF\n", + liodn[i], dev->of_node); ret = -EINVAL; break; } @@ -684,8 +684,7 @@ static int fsl_pamu_attach_device(struct iommu_domain *domain, liodn_cnt = len / sizeof(u32); ret = handle_attach_device(dma_domain, dev, liodn, liodn_cnt); } else { - pr_debug("missing fsl,liodn property at %s\n", - dev->of_node->full_name); + pr_debug("missing fsl,liodn property at %pOF\n", dev->of_node); ret = -EINVAL; } @@ -720,8 +719,7 @@ static void fsl_pamu_detach_device(struct iommu_domain *domain, if (prop) detach_device(dev, dma_domain); else - pr_debug("missing fsl,liodn property at %s\n", - dev->of_node->full_name); + pr_debug("missing fsl,liodn property at %pOF\n", dev->of_node); } static int configure_domain_geometry(struct iommu_domain *domain, void *data) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 687f18f65cea..d5e8b8628a1a 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -458,31 +458,6 @@ static LIST_HEAD(dmar_rmrr_units); #define for_each_rmrr_units(rmrr) \ list_for_each_entry(rmrr, &dmar_rmrr_units, list) -static void flush_unmaps_timeout(unsigned long data); - -struct deferred_flush_entry { - unsigned long iova_pfn; - unsigned long nrpages; - struct dmar_domain *domain; - struct page *freelist; -}; - -#define HIGH_WATER_MARK 250 -struct deferred_flush_table { - int next; - struct deferred_flush_entry entries[HIGH_WATER_MARK]; -}; - -struct deferred_flush_data { - spinlock_t lock; - int timer_on; - struct timer_list timer; - long size; - struct deferred_flush_table *tables; -}; - -static DEFINE_PER_CPU(struct deferred_flush_data, deferred_flush); - /* bitmap for indexing intel_iommus */ static int g_num_of_iommus; @@ -1309,6 +1284,13 @@ static void dma_free_pagelist(struct page *freelist) } } +static void iova_entry_free(unsigned long data) +{ + struct page *freelist = (struct page *)data; + + dma_free_pagelist(freelist); +} + /* iommu handling */ static int iommu_alloc_root_entry(struct intel_iommu *iommu) { @@ -1622,6 +1604,25 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu, addr, mask); } +static void iommu_flush_iova(struct iova_domain *iovad) +{ + struct dmar_domain *domain; + int idx; + + domain = container_of(iovad, struct dmar_domain, iovad); + + for_each_domain_iommu(idx, domain) { + struct intel_iommu *iommu = g_iommus[idx]; + u16 did = domain->iommu_did[iommu->seq_id]; + + iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH); + + if (!cap_caching_mode(iommu->cap)) + iommu_flush_dev_iotlb(get_iommu_domain(iommu, did), + 0, MAX_AGAW_PFN_WIDTH); + } +} + static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) { u32 pmen; @@ -1932,9 +1933,16 @@ static int domain_init(struct dmar_domain *domain, struct intel_iommu *iommu, { int adjust_width, agaw; unsigned long sagaw; + int err; init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN, DMA_32BIT_PFN); + + err = init_iova_flush_queue(&domain->iovad, + iommu_flush_iova, iova_entry_free); + if (err) + return err; + domain_reserve_special_ranges(domain); /* calculate AGAW */ @@ -1986,14 +1994,6 @@ static void domain_exit(struct dmar_domain *domain) if (!domain) return; - /* Flush any lazy unmaps that may reference this domain */ - if (!intel_iommu_strict) { - int cpu; - - for_each_possible_cpu(cpu) - flush_unmaps_timeout(cpu); - } - /* Remove associated devices and clear attached or cached domains */ rcu_read_lock(); domain_remove_dev_info(domain); @@ -3206,7 +3206,7 @@ static int __init init_dmars(void) bool copied_tables = false; struct device *dev; struct intel_iommu *iommu; - int i, ret, cpu; + int i, ret; /* * for each drhd @@ -3239,22 +3239,6 @@ static int __init init_dmars(void) goto error; } - for_each_possible_cpu(cpu) { - struct deferred_flush_data *dfd = per_cpu_ptr(&deferred_flush, - cpu); - - dfd->tables = kzalloc(g_num_of_iommus * - sizeof(struct deferred_flush_table), - GFP_KERNEL); - if (!dfd->tables) { - ret = -ENOMEM; - goto free_g_iommus; - } - - spin_lock_init(&dfd->lock); - setup_timer(&dfd->timer, flush_unmaps_timeout, cpu); - } - for_each_active_iommu(iommu, drhd) { g_iommus[iommu->seq_id] = iommu; @@ -3437,10 +3421,9 @@ free_iommu: disable_dmar_iommu(iommu); free_dmar_iommu(iommu); } -free_g_iommus: - for_each_possible_cpu(cpu) - kfree(per_cpu_ptr(&deferred_flush, cpu)->tables); + kfree(g_iommus); + error: return ret; } @@ -3645,110 +3628,6 @@ static dma_addr_t intel_map_page(struct device *dev, struct page *page, dir, *dev->dma_mask); } -static void flush_unmaps(struct deferred_flush_data *flush_data) -{ - int i, j; - - flush_data->timer_on = 0; - - /* just flush them all */ - for (i = 0; i < g_num_of_iommus; i++) { - struct intel_iommu *iommu = g_iommus[i]; - struct deferred_flush_table *flush_table = - &flush_data->tables[i]; - if (!iommu) - continue; - - if (!flush_table->next) - continue; - - /* In caching mode, global flushes turn emulation expensive */ - if (!cap_caching_mode(iommu->cap)) - iommu->flush.flush_iotlb(iommu, 0, 0, 0, - DMA_TLB_GLOBAL_FLUSH); - for (j = 0; j < flush_table->next; j++) { - unsigned long mask; - struct deferred_flush_entry *entry = - &flush_table->entries[j]; - unsigned long iova_pfn = entry->iova_pfn; - unsigned long nrpages = entry->nrpages; - struct dmar_domain *domain = entry->domain; - struct page *freelist = entry->freelist; - - /* On real hardware multiple invalidations are expensive */ - if (cap_caching_mode(iommu->cap)) - iommu_flush_iotlb_psi(iommu, domain, - mm_to_dma_pfn(iova_pfn), - nrpages, !freelist, 0); - else { - mask = ilog2(nrpages); - iommu_flush_dev_iotlb(domain, - (uint64_t)iova_pfn << PAGE_SHIFT, mask); - } - free_iova_fast(&domain->iovad, iova_pfn, nrpages); - if (freelist) - dma_free_pagelist(freelist); - } - flush_table->next = 0; - } - - flush_data->size = 0; -} - -static void flush_unmaps_timeout(unsigned long cpuid) -{ - struct deferred_flush_data *flush_data = per_cpu_ptr(&deferred_flush, cpuid); - unsigned long flags; - - spin_lock_irqsave(&flush_data->lock, flags); - flush_unmaps(flush_data); - spin_unlock_irqrestore(&flush_data->lock, flags); -} - -static void add_unmap(struct dmar_domain *dom, unsigned long iova_pfn, - unsigned long nrpages, struct page *freelist) -{ - unsigned long flags; - int entry_id, iommu_id; - struct intel_iommu *iommu; - struct deferred_flush_entry *entry; - struct deferred_flush_data *flush_data; - - flush_data = raw_cpu_ptr(&deferred_flush); - - /* Flush all CPUs' entries to avoid deferring too much. If - * this becomes a bottleneck, can just flush us, and rely on - * flush timer for the rest. - */ - if (flush_data->size == HIGH_WATER_MARK) { - int cpu; - - for_each_online_cpu(cpu) - flush_unmaps_timeout(cpu); - } - - spin_lock_irqsave(&flush_data->lock, flags); - - iommu = domain_get_iommu(dom); - iommu_id = iommu->seq_id; - - entry_id = flush_data->tables[iommu_id].next; - ++(flush_data->tables[iommu_id].next); - - entry = &flush_data->tables[iommu_id].entries[entry_id]; - entry->domain = dom; - entry->iova_pfn = iova_pfn; - entry->nrpages = nrpages; - entry->freelist = freelist; - - if (!flush_data->timer_on) { - mod_timer(&flush_data->timer, jiffies + msecs_to_jiffies(10)); - flush_data->timer_on = 1; - } - flush_data->size++; - spin_unlock_irqrestore(&flush_data->lock, flags); -} - static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size) { struct dmar_domain *domain; @@ -3784,7 +3663,8 @@ static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size) free_iova_fast(&domain->iovad, iova_pfn, dma_to_mm_pfn(nrpages)); dma_free_pagelist(freelist); } else { - add_unmap(domain, iova_pfn, nrpages, freelist); + queue_iova(&domain->iovad, iova_pfn, nrpages, + (unsigned long)freelist); /* * queue up the release of the unmap to save the 1/6th of the * cpu used up by the iotlb flush operation... @@ -4721,7 +4601,6 @@ static void free_all_cpu_cached_iovas(unsigned int cpu) static int intel_iommu_cpu_dead(unsigned int cpu) { free_all_cpu_cached_iovas(cpu); - flush_unmaps_timeout(cpu); return 0; } diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 3f6ea160afed..af69bf7e035a 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1005,11 +1005,10 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev) if (group) return group; - group = ERR_PTR(-EINVAL); - - if (ops && ops->device_group) - group = ops->device_group(dev); + if (!ops) + return ERR_PTR(-EINVAL); + group = ops->device_group(dev); if (WARN_ON_ONCE(group == NULL)) return ERR_PTR(-EINVAL); @@ -1298,12 +1297,8 @@ int iommu_attach_device(struct iommu_domain *domain, struct device *dev) int ret; group = iommu_group_get(dev); - /* FIXME: Remove this when groups a mandatory for iommu drivers */ - if (group == NULL) - return __iommu_attach_device(domain, dev); - /* - * We have a group - lock it to make sure the device-count doesn't + * Lock the group to make sure the device-count doesn't * change while we are attaching */ mutex_lock(&group->mutex); @@ -1336,9 +1331,6 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev) struct iommu_group *group; group = iommu_group_get(dev); - /* FIXME: Remove this when groups a mandatory for iommu drivers */ - if (group == NULL) - return __iommu_detach_device(domain, dev); mutex_lock(&group->mutex); if (iommu_group_device_count(group) != 1) { @@ -1360,9 +1352,6 @@ struct iommu_domain *iommu_get_domain_for_dev(struct device *dev) struct iommu_group *group; group = iommu_group_get(dev); - /* FIXME: Remove this when groups a mandatory for iommu drivers */ - if (group == NULL) - return NULL; domain = group->domain; diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index 246f14c83944..33edfa794ae9 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -32,6 +32,8 @@ static unsigned long iova_rcache_get(struct iova_domain *iovad, unsigned long limit_pfn); static void init_iova_rcaches(struct iova_domain *iovad); static void free_iova_rcaches(struct iova_domain *iovad); +static void fq_destroy_all_entries(struct iova_domain *iovad); +static void fq_flush_timeout(unsigned long data); void init_iova_domain(struct iova_domain *iovad, unsigned long granule, @@ -50,10 +52,61 @@ init_iova_domain(struct iova_domain *iovad, unsigned long granule, iovad->granule = granule; iovad->start_pfn = start_pfn; iovad->dma_32bit_pfn = pfn_32bit + 1; + iovad->flush_cb = NULL; + iovad->fq = NULL; init_iova_rcaches(iovad); } EXPORT_SYMBOL_GPL(init_iova_domain); +static void free_iova_flush_queue(struct iova_domain *iovad) +{ + if (!iovad->fq) + return; + + if (timer_pending(&iovad->fq_timer)) + del_timer(&iovad->fq_timer); + + fq_destroy_all_entries(iovad); + + free_percpu(iovad->fq); + + iovad->fq = NULL; + iovad->flush_cb = NULL; + iovad->entry_dtor = NULL; +} + +int init_iova_flush_queue(struct iova_domain *iovad, + iova_flush_cb flush_cb, iova_entry_dtor entry_dtor) +{ + int cpu; + + atomic64_set(&iovad->fq_flush_start_cnt, 0); + atomic64_set(&iovad->fq_flush_finish_cnt, 0); + + iovad->fq = alloc_percpu(struct iova_fq); + if (!iovad->fq) + return -ENOMEM; + + iovad->flush_cb = flush_cb; + iovad->entry_dtor = entry_dtor; + + for_each_possible_cpu(cpu) { + struct iova_fq *fq; + + fq = per_cpu_ptr(iovad->fq, cpu); + fq->head = 0; + fq->tail = 0; + + spin_lock_init(&fq->lock); + } + + setup_timer(&iovad->fq_timer, fq_flush_timeout, (unsigned long)iovad); + atomic_set(&iovad->fq_timer_on, 0); + + return 0; +} +EXPORT_SYMBOL_GPL(init_iova_flush_queue); + static struct rb_node * __get_cached_rbnode(struct iova_domain *iovad, unsigned long *limit_pfn) { @@ -423,6 +476,135 @@ free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size) } EXPORT_SYMBOL_GPL(free_iova_fast); +#define fq_ring_for_each(i, fq) \ + for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE) + +static inline bool fq_full(struct iova_fq *fq) +{ + assert_spin_locked(&fq->lock); + return (((fq->tail + 1) % IOVA_FQ_SIZE) == fq->head); +} + +static inline unsigned fq_ring_add(struct iova_fq *fq) +{ + unsigned idx = fq->tail; + + assert_spin_locked(&fq->lock); + + fq->tail = (idx + 1) % IOVA_FQ_SIZE; + + return idx; +} + +static void fq_ring_free(struct iova_domain *iovad, struct iova_fq *fq) +{ + u64 counter = atomic64_read(&iovad->fq_flush_finish_cnt); + unsigned idx; + + assert_spin_locked(&fq->lock); + + fq_ring_for_each(idx, fq) { + + if (fq->entries[idx].counter >= counter) + break; + + if (iovad->entry_dtor) + iovad->entry_dtor(fq->entries[idx].data); + + free_iova_fast(iovad, + fq->entries[idx].iova_pfn, + fq->entries[idx].pages); + + fq->head = (fq->head + 1) % IOVA_FQ_SIZE; + } +} + +static void iova_domain_flush(struct iova_domain *iovad) +{ + atomic64_inc(&iovad->fq_flush_start_cnt); + iovad->flush_cb(iovad); + atomic64_inc(&iovad->fq_flush_finish_cnt); +} + +static void fq_destroy_all_entries(struct iova_domain *iovad) +{ + int cpu; + + /* + * This code runs when the iova_domain is being detroyed, so don't + * bother to free iovas, just call the entry_dtor on all remaining + * entries. + */ + if (!iovad->entry_dtor) + return; + + for_each_possible_cpu(cpu) { + struct iova_fq *fq = per_cpu_ptr(iovad->fq, cpu); + int idx; + + fq_ring_for_each(idx, fq) + iovad->entry_dtor(fq->entries[idx].data); + } +} + +static void fq_flush_timeout(unsigned long data) +{ + struct iova_domain *iovad = (struct iova_domain *)data; + int cpu; + + atomic_set(&iovad->fq_timer_on, 0); + iova_domain_flush(iovad); + + for_each_possible_cpu(cpu) { + unsigned long flags; + struct iova_fq *fq; + + fq = per_cpu_ptr(iovad->fq, cpu); + spin_lock_irqsave(&fq->lock, flags); + fq_ring_free(iovad, fq); + spin_unlock_irqrestore(&fq->lock, flags); + } +} + +void queue_iova(struct iova_domain *iovad, + unsigned long pfn, unsigned long pages, + unsigned long data) +{ + struct iova_fq *fq = get_cpu_ptr(iovad->fq); + unsigned long flags; + unsigned idx; + + spin_lock_irqsave(&fq->lock, flags); + + /* + * First remove all entries from the flush queue that have already been + * flushed out on another CPU. This makes the fq_full() check below less + * likely to be true. + */ + fq_ring_free(iovad, fq); + + if (fq_full(fq)) { + iova_domain_flush(iovad); + fq_ring_free(iovad, fq); + } + + idx = fq_ring_add(fq); + + fq->entries[idx].iova_pfn = pfn; + fq->entries[idx].pages = pages; + fq->entries[idx].data = data; + fq->entries[idx].counter = atomic64_read(&iovad->fq_flush_start_cnt); + + spin_unlock_irqrestore(&fq->lock, flags); + + if (atomic_cmpxchg(&iovad->fq_timer_on, 0, 1) == 0) + mod_timer(&iovad->fq_timer, + jiffies + msecs_to_jiffies(IOVA_FQ_TIMEOUT)); + + put_cpu_ptr(iovad->fq); +} +EXPORT_SYMBOL_GPL(queue_iova); + /** * put_iova_domain - destroys the iova doamin * @iovad: - iova domain in question. @@ -433,6 +615,7 @@ void put_iova_domain(struct iova_domain *iovad) struct rb_node *node; unsigned long flags; + free_iova_flush_queue(iovad); free_iova_rcaches(iovad); spin_lock_irqsave(&iovad->iova_rbtree_lock, flags); node = rb_first(&iovad->rbroot); diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index d0448353d501..04f4d51ffacb 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -393,6 +393,7 @@ static struct msm_iommu_dev *find_iommu_for_dev(struct device *dev) static int msm_iommu_add_device(struct device *dev) { struct msm_iommu_dev *iommu; + struct iommu_group *group; unsigned long flags; int ret = 0; @@ -406,7 +407,16 @@ static int msm_iommu_add_device(struct device *dev) spin_unlock_irqrestore(&msm_iommu_lock, flags); - return ret; + if (ret) + return ret; + + group = iommu_group_get_for_dev(dev); + if (IS_ERR(group)) + return PTR_ERR(group); + + iommu_group_put(group); + + return 0; } static void msm_iommu_remove_device(struct device *dev) @@ -421,6 +431,8 @@ static void msm_iommu_remove_device(struct device *dev) iommu_device_unlink(&iommu->iommu, dev); spin_unlock_irqrestore(&msm_iommu_lock, flags); + + iommu_group_remove_device(dev); } static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev) @@ -700,6 +712,7 @@ static struct iommu_ops msm_iommu_ops = { .iova_to_phys = msm_iommu_iova_to_phys, .add_device = msm_iommu_add_device, .remove_device = msm_iommu_remove_device, + .device_group = generic_device_group, .pgsize_bitmap = MSM_IOMMU_PGSIZES, .of_xlate = qcom_iommu_of_xlate, }; diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 8cb60829a7a1..e60e3dba85a0 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -25,6 +25,8 @@ #include <linux/of_pci.h> #include <linux/slab.h> +#define NO_IOMMU 1 + static const struct of_device_id __iommu_of_table_sentinel __used __section(__iommu_of_table_end); @@ -109,8 +111,8 @@ static bool of_iommu_driver_present(struct device_node *np) return of_match_node(&__iommu_of_table, np); } -static const struct iommu_ops -*of_iommu_xlate(struct device *dev, struct of_phandle_args *iommu_spec) +static int of_iommu_xlate(struct device *dev, + struct of_phandle_args *iommu_spec) { const struct iommu_ops *ops; struct fwnode_handle *fwnode = &iommu_spec->np->fwnode; @@ -120,95 +122,53 @@ static const struct iommu_ops if ((ops && !ops->of_xlate) || !of_device_is_available(iommu_spec->np) || (!ops && !of_iommu_driver_present(iommu_spec->np))) - return NULL; + return NO_IOMMU; err = iommu_fwspec_init(dev, &iommu_spec->np->fwnode, ops); if (err) - return ERR_PTR(err); + return err; /* * The otherwise-empty fwspec handily serves to indicate the specific * IOMMU device we're waiting for, which will be useful if we ever get * a proper probe-ordering dependency mechanism in future. */ if (!ops) - return ERR_PTR(-EPROBE_DEFER); - - err = ops->of_xlate(dev, iommu_spec); - if (err) - return ERR_PTR(err); + return -EPROBE_DEFER; - return ops; + return ops->of_xlate(dev, iommu_spec); } -static int __get_pci_rid(struct pci_dev *pdev, u16 alias, void *data) -{ - struct of_phandle_args *iommu_spec = data; - - iommu_spec->args[0] = alias; - return iommu_spec->np == pdev->bus->dev.of_node; -} +struct of_pci_iommu_alias_info { + struct device *dev; + struct device_node *np; +}; -static const struct iommu_ops -*of_pci_iommu_init(struct pci_dev *pdev, struct device_node *bridge_np) +static int of_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data) { - const struct iommu_ops *ops; - struct of_phandle_args iommu_spec; + struct of_pci_iommu_alias_info *info = data; + struct of_phandle_args iommu_spec = { .args_count = 1 }; int err; - /* - * Start by tracing the RID alias down the PCI topology as - * far as the host bridge whose OF node we have... - * (we're not even attempting to handle multi-alias devices yet) - */ - iommu_spec.args_count = 1; - iommu_spec.np = bridge_np; - pci_for_each_dma_alias(pdev, __get_pci_rid, &iommu_spec); - /* - * ...then find out what that becomes once it escapes the PCI - * bus into the system beyond, and which IOMMU it ends up at. - */ - iommu_spec.np = NULL; - err = of_pci_map_rid(bridge_np, iommu_spec.args[0], "iommu-map", + err = of_pci_map_rid(info->np, alias, "iommu-map", "iommu-map-mask", &iommu_spec.np, iommu_spec.args); if (err) - return err == -ENODEV ? NULL : ERR_PTR(err); - - ops = of_iommu_xlate(&pdev->dev, &iommu_spec); + return err == -ENODEV ? NO_IOMMU : err; + err = of_iommu_xlate(info->dev, &iommu_spec); of_node_put(iommu_spec.np); - return ops; -} - -static const struct iommu_ops -*of_platform_iommu_init(struct device *dev, struct device_node *np) -{ - struct of_phandle_args iommu_spec; - const struct iommu_ops *ops = NULL; - int idx = 0; - - /* - * We don't currently walk up the tree looking for a parent IOMMU. - * See the `Notes:' section of - * Documentation/devicetree/bindings/iommu/iommu.txt - */ - while (!of_parse_phandle_with_args(np, "iommus", "#iommu-cells", - idx, &iommu_spec)) { - ops = of_iommu_xlate(dev, &iommu_spec); - of_node_put(iommu_spec.np); - idx++; - if (IS_ERR_OR_NULL(ops)) - break; - } + if (err) + return err; - return ops; + return info->np == pdev->bus->dev.of_node; } const struct iommu_ops *of_iommu_configure(struct device *dev, struct device_node *master_np) { - const struct iommu_ops *ops; + const struct iommu_ops *ops = NULL; struct iommu_fwspec *fwspec = dev->iommu_fwspec; + int err = NO_IOMMU; if (!master_np) return NULL; @@ -221,25 +181,54 @@ const struct iommu_ops *of_iommu_configure(struct device *dev, iommu_fwspec_free(dev); } - if (dev_is_pci(dev)) - ops = of_pci_iommu_init(to_pci_dev(dev), master_np); - else - ops = of_platform_iommu_init(dev, master_np); + /* + * We don't currently walk up the tree looking for a parent IOMMU. + * See the `Notes:' section of + * Documentation/devicetree/bindings/iommu/iommu.txt + */ + if (dev_is_pci(dev)) { + struct of_pci_iommu_alias_info info = { + .dev = dev, + .np = master_np, + }; + + err = pci_for_each_dma_alias(to_pci_dev(dev), + of_pci_iommu_init, &info); + } else { + struct of_phandle_args iommu_spec; + int idx = 0; + + while (!of_parse_phandle_with_args(master_np, "iommus", + "#iommu-cells", + idx, &iommu_spec)) { + err = of_iommu_xlate(dev, &iommu_spec); + of_node_put(iommu_spec.np); + idx++; + if (err) + break; + } + } + + /* + * Two success conditions can be represented by non-negative err here: + * >0 : there is no IOMMU, or one was unavailable for non-fatal reasons + * 0 : we found an IOMMU, and dev->fwspec is initialised appropriately + * <0 : any actual error + */ + if (!err) + ops = dev->iommu_fwspec->ops; /* * If we have reason to believe the IOMMU driver missed the initial * add_device callback for dev, replay it to get things in order. */ - if (!IS_ERR_OR_NULL(ops) && ops->add_device && - dev->bus && !dev->iommu_group) { - int err = ops->add_device(dev); - - if (err) - ops = ERR_PTR(err); - } + if (ops && ops->add_device && dev->bus && !dev->iommu_group) + err = ops->add_device(dev); /* Ignore all other errors apart from EPROBE_DEFER */ - if (IS_ERR(ops) && (PTR_ERR(ops) != -EPROBE_DEFER)) { - dev_dbg(dev, "Adding to IOMMU failed: %ld\n", PTR_ERR(ops)); + if (err == -EPROBE_DEFER) { + ops = ERR_PTR(err); + } else if (err < 0) { + dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); ops = NULL; } @@ -255,8 +244,7 @@ static int __init of_iommu_init(void) const of_iommu_init_fn init_fn = match->data; if (init_fn && init_fn(np)) - pr_err("Failed to initialise IOMMU %s\n", - of_node_full_name(np)); + pr_err("Failed to initialise IOMMU %pOF\n", np); } return 0; diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 4ba48a26b389..1b8155dada26 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -1008,20 +1008,20 @@ static int rk_iommu_group_set_iommudata(struct iommu_group *group, ret = of_parse_phandle_with_args(np, "iommus", "#iommu-cells", 0, &args); if (ret) { - dev_err(dev, "of_parse_phandle_with_args(%s) => %d\n", - np->full_name, ret); + dev_err(dev, "of_parse_phandle_with_args(%pOF) => %d\n", + np, ret); return ret; } if (args.args_count != 0) { - dev_err(dev, "incorrect number of iommu params found for %s (found %d, expected 0)\n", - args.np->full_name, args.args_count); + dev_err(dev, "incorrect number of iommu params found for %pOF (found %d, expected 0)\n", + args.np, args.args_count); return -EINVAL; } pd = of_find_device_by_node(args.np); of_node_put(args.np); if (!pd) { - dev_err(dev, "iommu %s not found\n", args.np->full_name); + dev_err(dev, "iommu %pOF not found\n", args.np); return -EPROBE_DEFER; } diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c index 37e708fdbb5a..29bafc6e82ae 100644 --- a/drivers/iommu/tegra-gart.c +++ b/drivers/iommu/tegra-gart.c @@ -334,12 +334,31 @@ static bool gart_iommu_capable(enum iommu_cap cap) return false; } +static int gart_iommu_add_device(struct device *dev) +{ + struct iommu_group *group = iommu_group_get_for_dev(dev); + + if (IS_ERR(group)) + return PTR_ERR(group); + + iommu_group_put(group); + return 0; +} + +static void gart_iommu_remove_device(struct device *dev) +{ + iommu_group_remove_device(dev); +} + static const struct iommu_ops gart_iommu_ops = { .capable = gart_iommu_capable, .domain_alloc = gart_iommu_domain_alloc, .domain_free = gart_iommu_domain_free, .attach_dev = gart_iommu_attach_dev, .detach_dev = gart_iommu_detach_dev, + .add_device = gart_iommu_add_device, + .remove_device = gart_iommu_remove_device, + .device_group = generic_device_group, .map = gart_iommu_map, .map_sg = default_iommu_map_sg, .unmap = gart_iommu_unmap, diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index eeb19f560a05..faa9c1e70482 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -704,6 +704,7 @@ static struct tegra_smmu *tegra_smmu_find(struct device_node *np) static int tegra_smmu_add_device(struct device *dev) { struct device_node *np = dev->of_node; + struct iommu_group *group; struct of_phandle_args args; unsigned int index = 0; @@ -725,12 +726,19 @@ static int tegra_smmu_add_device(struct device *dev) index++; } + group = iommu_group_get_for_dev(dev); + if (IS_ERR(group)) + return PTR_ERR(group); + + iommu_group_put(group); + return 0; } static void tegra_smmu_remove_device(struct device *dev) { dev->archdata.iommu = NULL; + iommu_group_remove_device(dev); } static const struct iommu_ops tegra_smmu_ops = { @@ -741,6 +749,7 @@ static const struct iommu_ops tegra_smmu_ops = { .detach_dev = tegra_smmu_detach_dev, .add_device = tegra_smmu_add_device, .remove_device = tegra_smmu_remove_device, + .device_group = generic_device_group, .map = tegra_smmu_map, .unmap = tegra_smmu_unmap, .map_sg = default_iommu_map_sg, diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 2cb54adc4a33..f1ce8e517d8d 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -425,13 +425,13 @@ static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev) } static inline int iommu_map(struct iommu_domain *domain, unsigned long iova, - phys_addr_t paddr, int gfp_order, int prot) + phys_addr_t paddr, size_t size, int prot) { return -ENODEV; } static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, - int gfp_order) + size_t size) { return -ENODEV; } diff --git a/include/linux/iova.h b/include/linux/iova.h index e0a892ae45c0..d179b9bf7814 100644 --- a/include/linux/iova.h +++ b/include/linux/iova.h @@ -14,6 +14,7 @@ #include <linux/types.h> #include <linux/kernel.h> #include <linux/rbtree.h> +#include <linux/atomic.h> #include <linux/dma-mapping.h> /* iova structure */ @@ -36,6 +37,35 @@ struct iova_rcache { struct iova_cpu_rcache __percpu *cpu_rcaches; }; +struct iova_domain; + +/* Call-Back from IOVA code into IOMMU drivers */ +typedef void (* iova_flush_cb)(struct iova_domain *domain); + +/* Destructor for per-entry data */ +typedef void (* iova_entry_dtor)(unsigned long data); + +/* Number of entries per Flush Queue */ +#define IOVA_FQ_SIZE 256 + +/* Timeout (in ms) after which entries are flushed from the Flush-Queue */ +#define IOVA_FQ_TIMEOUT 10 + +/* Flush Queue entry for defered flushing */ +struct iova_fq_entry { + unsigned long iova_pfn; + unsigned long pages; + unsigned long data; + u64 counter; /* Flush counter when this entrie was added */ +}; + +/* Per-CPU Flush Queue structure */ +struct iova_fq { + struct iova_fq_entry entries[IOVA_FQ_SIZE]; + unsigned head, tail; + spinlock_t lock; +}; + /* holds all the iova translations for a domain */ struct iova_domain { spinlock_t iova_rbtree_lock; /* Lock to protect update of rbtree */ @@ -45,6 +75,25 @@ struct iova_domain { unsigned long start_pfn; /* Lower limit for this domain */ unsigned long dma_32bit_pfn; struct iova_rcache rcaches[IOVA_RANGE_CACHE_MAX_SIZE]; /* IOVA range caches */ + + iova_flush_cb flush_cb; /* Call-Back function to flush IOMMU + TLBs */ + + iova_entry_dtor entry_dtor; /* IOMMU driver specific destructor for + iova entry */ + + struct iova_fq __percpu *fq; /* Flush Queue */ + + atomic64_t fq_flush_start_cnt; /* Number of TLB flushes that + have been started */ + + atomic64_t fq_flush_finish_cnt; /* Number of TLB flushes that + have been finished */ + + struct timer_list fq_timer; /* Timer to regularily empty the + flush-queues */ + atomic_t fq_timer_on; /* 1 when timer is active, 0 + when not */ }; static inline unsigned long iova_size(struct iova *iova) @@ -95,6 +144,9 @@ struct iova *alloc_iova(struct iova_domain *iovad, unsigned long size, bool size_aligned); void free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size); +void queue_iova(struct iova_domain *iovad, + unsigned long pfn, unsigned long pages, + unsigned long data); unsigned long alloc_iova_fast(struct iova_domain *iovad, unsigned long size, unsigned long limit_pfn); struct iova *reserve_iova(struct iova_domain *iovad, unsigned long pfn_lo, @@ -102,6 +154,8 @@ struct iova *reserve_iova(struct iova_domain *iovad, unsigned long pfn_lo, void copy_reserved_iova(struct iova_domain *from, struct iova_domain *to); void init_iova_domain(struct iova_domain *iovad, unsigned long granule, unsigned long start_pfn, unsigned long pfn_32bit); +int init_iova_flush_queue(struct iova_domain *iovad, + iova_flush_cb flush_cb, iova_entry_dtor entry_dtor); struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn); void put_iova_domain(struct iova_domain *iovad); struct iova *split_and_remove_iova(struct iova_domain *iovad, @@ -148,6 +202,12 @@ static inline void free_iova_fast(struct iova_domain *iovad, { } +static inline void queue_iova(struct iova_domain *iovad, + unsigned long pfn, unsigned long pages, + unsigned long data) +{ +} + static inline unsigned long alloc_iova_fast(struct iova_domain *iovad, unsigned long size, unsigned long limit_pfn) @@ -174,6 +234,13 @@ static inline void init_iova_domain(struct iova_domain *iovad, { } +static inline int init_iova_flush_queue(struct iova_domain *iovad, + iova_flush_cb flush_cb, + iova_entry_dtor entry_dtor) +{ + return -ENODEV; +} + static inline struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn) { |