Allow the iommu_unmap_fast to return newly freed page table pages and pass the freelist to queue_iova in the dma-iommu ops path.
This is useful for iommu drivers (in this case the intel iommu driver) which need to wait for the ioTLB to be flushed before newly free/unmapped page table pages can be freed. This way we can still batch ioTLB free operations and handle the freelists.
Signed-off-by: Tom Murphy murphyt7@tcd.ie --- drivers/iommu/amd_iommu.c | 14 ++++++++- drivers/iommu/arm-smmu-v3.c | 3 +- drivers/iommu/arm-smmu.c | 3 +- drivers/iommu/dma-iommu.c | 45 ++++++++++++++++++++++------- drivers/iommu/exynos-iommu.c | 3 +- drivers/iommu/intel-iommu.c | 51 +++++++++++++++++++++------------ drivers/iommu/iommu.c | 29 ++++++++++++++----- drivers/iommu/ipmmu-vmsa.c | 3 +- drivers/iommu/msm_iommu.c | 3 +- drivers/iommu/mtk_iommu.c | 3 +- drivers/iommu/mtk_iommu_v1.c | 3 +- drivers/iommu/omap-iommu.c | 3 +- drivers/iommu/qcom_iommu.c | 3 +- drivers/iommu/rockchip-iommu.c | 3 +- drivers/iommu/s390-iommu.c | 3 +- drivers/iommu/tegra-gart.c | 3 +- drivers/iommu/tegra-smmu.c | 3 +- drivers/iommu/virtio-iommu.c | 3 +- drivers/vfio/vfio_iommu_type1.c | 2 +- include/linux/iommu.h | 25 ++++++++++++---- 20 files changed, 151 insertions(+), 57 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index bd25674ee4db..e8a4c0842624 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2542,7 +2542,8 @@ static int amd_iommu_map(struct iommu_domain *dom, unsigned long iova,
static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova, size_t page_size, - struct iommu_iotlb_gather *gather) + struct iommu_iotlb_gather *gather, + struct page **freelist) { struct protection_domain *domain = to_pdomain(dom);
@@ -2668,6 +2669,16 @@ static void amd_iommu_flush_iotlb_all(struct iommu_domain *domain) spin_unlock_irqrestore(&dom->lock, flags); }
+static void amd_iommu_flush_iotlb_range(struct iommu_domain *domain, + unsigned long iova, size_t size, + struct page *freelist) +{ + struct protection_domain *dom = to_pdomain(domain); + + domain_flush_pages(dom, iova, size); + domain_flush_complete(dom); +} + static void amd_iommu_iotlb_sync(struct iommu_domain *domain, struct iommu_iotlb_gather *gather) { @@ -2692,6 +2703,7 @@ const struct iommu_ops amd_iommu_ops = { .is_attach_deferred = amd_iommu_is_attach_deferred, .pgsize_bitmap = AMD_IOMMU_PGSIZES, .flush_iotlb_all = amd_iommu_flush_iotlb_all, + .flush_iotlb_range = amd_iommu_flush_iotlb_range, .iotlb_sync = amd_iommu_iotlb_sync, };
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index effe72eb89e7..a27d4bf4492c 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2459,7 +2459,8 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova, }
static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova, - size_t size, struct iommu_iotlb_gather *gather) + size_t size, struct iommu_iotlb_gather *gather, + struct page **freelist) { struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); struct io_pgtable_ops *ops = smmu_domain->pgtbl_ops; diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 4f1a350d9529..ea1ab3387a07 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1205,7 +1205,8 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova, }
static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova, - size_t size, struct iommu_iotlb_gather *gather) + size_t size, struct iommu_iotlb_gather *gather, + struct page **freelist) { struct io_pgtable_ops *ops = to_smmu_domain(domain)->pgtbl_ops; struct arm_smmu_device *smmu = to_smmu_domain(domain)->smmu; diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 0cc702a70a96..df28facdfb8b 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -50,6 +50,19 @@ struct iommu_dma_cookie { struct iommu_domain *fq_domain; };
+static void iommu_dma_entry_dtor(unsigned long data) +{ + struct page *freelist = (struct page *)data; + + while (freelist != NULL) { + unsigned long p = (unsigned long)page_address(freelist); + + freelist = freelist->freelist; + free_page(p); + } +} + + static inline size_t cookie_msi_granule(struct iommu_dma_cookie *cookie) { if (cookie->type == IOMMU_DMA_IOVA_COOKIE) @@ -345,7 +358,8 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, if (!cookie->fq_domain && !iommu_domain_get_attr(domain, DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, &attr) && attr) { cookie->fq_domain = domain; - init_iova_flush_queue(iovad, iommu_dma_flush_iotlb_all, NULL); + init_iova_flush_queue(iovad, iommu_dma_flush_iotlb_all, + iommu_dma_entry_dtor); }
if (!dev) @@ -439,7 +453,7 @@ static dma_addr_t iommu_dma_alloc_iova(struct iommu_domain *domain, }
static void iommu_dma_free_iova(struct iommu_dma_cookie *cookie, - dma_addr_t iova, size_t size) + dma_addr_t iova, size_t size, struct page *freelist) { struct iova_domain *iovad = &cookie->iovad;
@@ -448,7 +462,8 @@ static void iommu_dma_free_iova(struct iommu_dma_cookie *cookie, cookie->msi_iova -= size; else if (cookie->fq_domain) /* non-strict mode */ queue_iova(iovad, iova_pfn(iovad, iova), - size >> iova_shift(iovad), 0); + size >> iova_shift(iovad), + (unsigned long) freelist); else free_iova_fast(iovad, iova_pfn(iovad, iova), size >> iova_shift(iovad)); @@ -462,18 +477,26 @@ static void __iommu_dma_unmap(struct device *dev, dma_addr_t dma_addr, struct iova_domain *iovad = &cookie->iovad; size_t iova_off = iova_offset(iovad, dma_addr); struct iommu_iotlb_gather iotlb_gather; + struct page *freelist = NULL; size_t unmapped;
dma_addr -= iova_off; size = iova_align(iovad, size + iova_off); iommu_iotlb_gather_init(&iotlb_gather);
- unmapped = iommu_unmap_fast(domain, dma_addr, size, &iotlb_gather); + unmapped = iommu_unmap_fast(domain, dma_addr, size, &iotlb_gather, + &freelist); WARN_ON(unmapped != size);
- if (!cookie->fq_domain) - iommu_tlb_sync(domain, &iotlb_gather); - iommu_dma_free_iova(cookie, dma_addr, size); + if (!cookie->fq_domain) { + if (domain->ops->flush_iotlb_range) + domain->ops->flush_iotlb_range(domain, dma_addr, size, + freelist); + else + iommu_tlb_sync(domain, &iotlb_gather); + } + + iommu_dma_free_iova(cookie, dma_addr, size, freelist); }
static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys, @@ -495,7 +518,7 @@ static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys, return DMA_MAPPING_ERROR;
if (iommu_map_atomic(domain, iova, phys - iova_off, size, prot)) { - iommu_dma_free_iova(cookie, iova, size); + iommu_dma_free_iova(cookie, iova, size, NULL); return DMA_MAPPING_ERROR; } return iova + iova_off; @@ -650,7 +673,7 @@ static void *iommu_dma_alloc_remap(struct device *dev, size_t size, out_free_sg: sg_free_table(&sgt); out_free_iova: - iommu_dma_free_iova(cookie, iova, size); + iommu_dma_free_iova(cookie, iova, size, NULL); out_free_pages: __iommu_dma_free_pages(pages, count); return NULL; @@ -901,7 +924,7 @@ static int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, return __finalise_sg(dev, sg, nents, iova);
out_free_iova: - iommu_dma_free_iova(cookie, iova, iova_len); + iommu_dma_free_iova(cookie, iova, iova_len, NULL); out_restore_sg: __invalidate_sg(sg, nents); return 0; @@ -1194,7 +1217,7 @@ static struct iommu_dma_msi_page *iommu_dma_get_msi_page(struct device *dev, return msi_page;
out_free_iova: - iommu_dma_free_iova(cookie, iova, size); + iommu_dma_free_iova(cookie, iova, size, NULL); out_free_page: kfree(msi_page); return NULL; diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 186ff5cc975c..e6456eb8ac4d 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -1129,7 +1129,8 @@ static void exynos_iommu_tlb_invalidate_entry(struct exynos_iommu_domain *domain
static size_t exynos_iommu_unmap(struct iommu_domain *iommu_domain, unsigned long l_iova, size_t size, - struct iommu_iotlb_gather *gather) + struct iommu_iotlb_gather *gather, + struct page **freelist) { struct exynos_iommu_domain *domain = to_exynos_domain(iommu_domain); sysmmu_iova_t iova = (sysmmu_iova_t)l_iova; diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 8d72ea0fb843..675ca2aa6e20 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -1145,9 +1145,9 @@ static struct page *dma_pte_clear_level(struct dmar_domain *domain, int level, pages can only be freed after the IOTLB flush has been done. */ static struct page *domain_unmap(struct dmar_domain *domain, unsigned long start_pfn, - unsigned long last_pfn) + unsigned long last_pfn, + struct page *freelist) { - struct page *freelist;
BUG_ON(!domain_pfn_supported(domain, start_pfn)); BUG_ON(!domain_pfn_supported(domain, last_pfn)); @@ -1155,7 +1155,8 @@ static struct page *domain_unmap(struct dmar_domain *domain,
/* we don't need lock here; nobody else touches the iova range */ freelist = dma_pte_clear_level(domain, agaw_to_level(domain->agaw), - domain->pgd, 0, start_pfn, last_pfn, NULL); + domain->pgd, 0, start_pfn, last_pfn, + freelist);
/* free pgd */ if (start_pfn == 0 && last_pfn == DOMAIN_MAX_PFN(domain->gaw)) { @@ -1914,7 +1915,8 @@ static void domain_exit(struct dmar_domain *domain) if (domain->pgd) { struct page *freelist;
- freelist = domain_unmap(domain, 0, DOMAIN_MAX_PFN(domain->gaw)); + freelist = domain_unmap(domain, 0, DOMAIN_MAX_PFN(domain->gaw), + NULL); dma_free_pagelist(freelist); }
@@ -3541,7 +3543,7 @@ static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size) if (dev_is_pci(dev)) pdev = to_pci_dev(dev);
- freelist = domain_unmap(domain, start_pfn, last_pfn); + freelist = domain_unmap(domain, start_pfn, last_pfn, NULL); if (intel_iommu_strict || (pdev && pdev->untrusted) || !has_iova_flush_queue(&domain->iovad)) { iommu_flush_iotlb_psi(iommu, domain, start_pfn, @@ -4607,7 +4609,7 @@ static int intel_iommu_memory_notifier(struct notifier_block *nb, struct page *freelist;
freelist = domain_unmap(si_domain, start_vpfn, - last_vpfn); + last_vpfn, NULL);
rcu_read_lock(); for_each_active_iommu(iommu, drhd) @@ -5412,13 +5414,12 @@ static int intel_iommu_map(struct iommu_domain *domain,
static size_t intel_iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size, - struct iommu_iotlb_gather *gather) + struct iommu_iotlb_gather *gather, + struct page **freelist) { struct dmar_domain *dmar_domain = to_dmar_domain(domain); - struct page *freelist = NULL; unsigned long start_pfn, last_pfn; - unsigned int npages; - int iommu_id, level = 0; + int level = 0;
/* Cope with horrid API which requires us to unmap more than the size argument if it happens to be a large-page mapping. */ @@ -5432,20 +5433,33 @@ static size_t intel_iommu_unmap(struct iommu_domain *domain, start_pfn = iova >> VTD_PAGE_SHIFT; last_pfn = (iova + size - 1) >> VTD_PAGE_SHIFT;
- freelist = domain_unmap(dmar_domain, start_pfn, last_pfn); + *freelist = domain_unmap(dmar_domain, start_pfn, last_pfn, *freelist);
- npages = last_pfn - start_pfn + 1; + if (dmar_domain->max_addr == iova + size) + dmar_domain->max_addr = iova; + + return size; +} + +static void intel_iommu_flush_iotlb_range(struct iommu_domain *domain, + unsigned long iova, size_t size, + struct page *freelist) +{ + struct dmar_domain *dmar_domain = to_dmar_domain(domain); + unsigned long start_pfn, last_pfn; + unsigned long iova_pfn = IOVA_PFN(iova); + unsigned long nrpages; + int iommu_id; + + nrpages = aligned_nrpages(iova, size); + start_pfn = mm_to_dma_pfn(iova_pfn); + last_pfn = start_pfn + nrpages - 1;
for_each_domain_iommu(iommu_id, dmar_domain) iommu_flush_iotlb_psi(g_iommus[iommu_id], dmar_domain, - start_pfn, npages, !freelist, 0); + start_pfn, nrpages, !freelist, 0);
dma_free_pagelist(freelist); - - if (dmar_domain->max_addr == iova + size) - dmar_domain->max_addr = iova; - - return size; }
static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain, @@ -5902,6 +5916,7 @@ const struct iommu_ops intel_iommu_ops = { .aux_get_pasid = intel_iommu_aux_get_pasid, .map = intel_iommu_map, .unmap = intel_iommu_unmap, + .flush_iotlb_range = intel_iommu_flush_iotlb_range, .iova_to_phys = intel_iommu_iova_to_phys, .add_device = intel_iommu_add_device, .remove_device = intel_iommu_remove_device, diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index db7bfd4f2d20..cec728f40d9c 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -667,7 +667,7 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group,
}
- iommu_flush_tlb_all(domain); + iommu_flush_iotlb_all(domain);
out: iommu_put_resv_regions(dev, &mappings); @@ -1961,11 +1961,13 @@ EXPORT_SYMBOL_GPL(iommu_map_atomic);
static size_t __iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size, - struct iommu_iotlb_gather *iotlb_gather) + struct iommu_iotlb_gather *iotlb_gather, + struct page **freelist) { const struct iommu_ops *ops = domain->ops; size_t unmapped_page, unmapped = 0; unsigned long orig_iova = iova; + struct page *freelist_head = NULL; unsigned int min_pagesz;
if (unlikely(ops->unmap == NULL || @@ -1998,7 +2000,8 @@ static size_t __iommu_unmap(struct iommu_domain *domain, while (unmapped < size) { size_t pgsize = iommu_pgsize(domain, iova, size - unmapped);
- unmapped_page = ops->unmap(domain, iova, pgsize, iotlb_gather); + unmapped_page = ops->unmap(domain, iova, pgsize, iotlb_gather, + &freelist_head); if (!unmapped_page) break;
@@ -2009,6 +2012,9 @@ static size_t __iommu_unmap(struct iommu_domain *domain, unmapped += unmapped_page; }
+ if (freelist) + *freelist = freelist_head; + trace_unmap(orig_iova, size, unmapped); return unmapped; } @@ -2016,12 +2022,20 @@ static size_t __iommu_unmap(struct iommu_domain *domain, size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) { + const struct iommu_ops *ops = domain->ops; struct iommu_iotlb_gather iotlb_gather; + struct page *freelist; size_t ret;
iommu_iotlb_gather_init(&iotlb_gather); - ret = __iommu_unmap(domain, iova, size, &iotlb_gather); - iommu_tlb_sync(domain, &iotlb_gather); + ret = __iommu_unmap(domain, iova, size, &iotlb_gather, + &freelist); + + if (ops->flush_iotlb_range) + ops->flush_iotlb_range(domain, iova, ret, + freelist); + else + iommu_tlb_sync(domain, &iotlb_gather);
return ret; } @@ -2029,9 +2043,10 @@ EXPORT_SYMBOL_GPL(iommu_unmap);
size_t iommu_unmap_fast(struct iommu_domain *domain, unsigned long iova, size_t size, - struct iommu_iotlb_gather *iotlb_gather) + struct iommu_iotlb_gather *iotlb_gather, + struct page **freelist) { - return __iommu_unmap(domain, iova, size, iotlb_gather); + return __iommu_unmap(domain, iova, size, iotlb_gather, freelist); } EXPORT_SYMBOL_GPL(iommu_unmap_fast);
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index d02edd2751f3..63bbee653859 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -693,7 +693,8 @@ static int ipmmu_map(struct iommu_domain *io_domain, unsigned long iova, }
static size_t ipmmu_unmap(struct iommu_domain *io_domain, unsigned long iova, - size_t size, struct iommu_iotlb_gather *gather) + size_t size, struct iommu_iotlb_gather *gather, + struct page **freelist) { struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index 93f14bca26ee..66d1587ab714 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -518,7 +518,8 @@ static int msm_iommu_map(struct iommu_domain *domain, unsigned long iova, }
static size_t msm_iommu_unmap(struct iommu_domain *domain, unsigned long iova, - size_t len, struct iommu_iotlb_gather *gather) + size_t len, struct iommu_iotlb_gather *gather, + struct page **freelist) { struct msm_priv *priv = to_msm_priv(domain); unsigned long flags; diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 6fc1f5ecf91e..6bd9f39bb259 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -402,7 +402,8 @@ static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
static size_t mtk_iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size, - struct iommu_iotlb_gather *gather) + struct iommu_iotlb_gather *gather, + struct page **freelist) { struct mtk_iommu_domain *dom = to_mtk_domain(domain);
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index e93b94ecac45..f94d225c3404 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -325,7 +325,8 @@ static int mtk_iommu_map(struct iommu_domain *domain, unsigned long iova,
static size_t mtk_iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size, - struct iommu_iotlb_gather *gather) + struct iommu_iotlb_gather *gather, + struct page **freelist) { struct mtk_iommu_domain *dom = to_mtk_domain(domain); unsigned long flags; diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index be551cc34be4..c5e012267f2b 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -1383,7 +1383,8 @@ static int omap_iommu_map(struct iommu_domain *domain, unsigned long da, }
static size_t omap_iommu_unmap(struct iommu_domain *domain, unsigned long da, - size_t size, struct iommu_iotlb_gather *gather) + size_t size, struct iommu_iotlb_gather *gather, + struct page **freelist) { struct omap_iommu_domain *omap_domain = to_omap_domain(domain); struct device *dev = omap_domain->dev; diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c index 52f38292df5b..99ebf34e50be 100644 --- a/drivers/iommu/qcom_iommu.c +++ b/drivers/iommu/qcom_iommu.c @@ -440,7 +440,8 @@ static int qcom_iommu_map(struct iommu_domain *domain, unsigned long iova, }
static size_t qcom_iommu_unmap(struct iommu_domain *domain, unsigned long iova, - size_t size, struct iommu_iotlb_gather *gather) + size_t size, struct iommu_iotlb_gather *gather, + struct page **freelist) { size_t ret; unsigned long flags; diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index b33cdd5aad81..ec16e01c376a 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -795,7 +795,8 @@ static int rk_iommu_map(struct iommu_domain *domain, unsigned long _iova, }
static size_t rk_iommu_unmap(struct iommu_domain *domain, unsigned long _iova, - size_t size, struct iommu_iotlb_gather *gather) + size_t size, struct iommu_iotlb_gather *gather, + struct page **freelist) { struct rk_iommu_domain *rk_domain = to_rk_domain(domain); unsigned long flags; diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c index 1137f3ddcb85..d69d7cf4dee3 100644 --- a/drivers/iommu/s390-iommu.c +++ b/drivers/iommu/s390-iommu.c @@ -315,7 +315,8 @@ static phys_addr_t s390_iommu_iova_to_phys(struct iommu_domain *domain,
static size_t s390_iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size, - struct iommu_iotlb_gather *gather) + struct iommu_iotlb_gather *gather, + struct page **freelist) { struct s390_domain *s390_domain = to_s390_domain(domain); int flags = ZPCI_PTE_INVALID; diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c index 3fb7ba72507d..68e7eee9172f 100644 --- a/drivers/iommu/tegra-gart.c +++ b/drivers/iommu/tegra-gart.c @@ -207,7 +207,8 @@ static inline int __gart_iommu_unmap(struct gart_device *gart, }
static size_t gart_iommu_unmap(struct iommu_domain *domain, unsigned long iova, - size_t bytes, struct iommu_iotlb_gather *gather) + size_t bytes, struct iommu_iotlb_gather *gather, + struct page **freelist) { struct gart_device *gart = gart_handle; int err; diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 63a147b623e6..0c5e5f2c3c7d 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -686,7 +686,8 @@ static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova, }
static size_t tegra_smmu_unmap(struct iommu_domain *domain, unsigned long iova, - size_t size, struct iommu_iotlb_gather *gather) + size_t size, struct iommu_iotlb_gather *gather, + struct page **freelist) { struct tegra_smmu_as *as = to_smmu_as(domain); dma_addr_t pte_dma; diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index 315c7cc4f99d..e74baab27b61 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -750,7 +750,8 @@ static int viommu_map(struct iommu_domain *domain, unsigned long iova, }
static size_t viommu_unmap(struct iommu_domain *domain, unsigned long iova, - size_t size, struct iommu_iotlb_gather *gather) + size_t size, struct iommu_iotlb_gather *gather, + struct page *freelist) { int ret = 0; size_t unmapped; diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 2ada8e6cdb88..d24ea1181c03 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -685,7 +685,7 @@ static size_t unmap_unpin_fast(struct vfio_domain *domain,
if (entry) { unmapped = iommu_unmap_fast(domain->domain, *iova, len, - iotlb_gather); + iotlb_gather, NULL);
if (!unmapped) { kfree(entry); diff --git a/include/linux/iommu.h b/include/linux/iommu.h index f2223cbb5fd5..61cac25410b5 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -219,6 +219,7 @@ struct iommu_iotlb_gather { * @map: map a physically contiguous memory region to an iommu domain * @unmap: unmap a physically contiguous memory region from an iommu domain * @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain + * @flush_iotlb_range: Flush given iova range of hardware TLBs for this domain * @iotlb_sync_map: Sync mappings created recently using @map to the hardware * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush * queue @@ -262,8 +263,12 @@ struct iommu_ops { int (*map)(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot, gfp_t gfp); size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, - size_t size, struct iommu_iotlb_gather *iotlb_gather); + size_t size, struct iommu_iotlb_gather *iotlb_gather, + struct page **freelist); void (*flush_iotlb_all)(struct iommu_domain *domain); + void (*flush_iotlb_range)(struct iommu_domain *domain, + unsigned long iova, size_t size, + struct page *freelist); void (*iotlb_sync_map)(struct iommu_domain *domain); void (*iotlb_sync)(struct iommu_domain *domain, struct iommu_iotlb_gather *iotlb_gather); @@ -444,7 +449,8 @@ extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size); extern size_t iommu_unmap_fast(struct iommu_domain *domain, unsigned long iova, size_t size, - struct iommu_iotlb_gather *iotlb_gather); + struct iommu_iotlb_gather *iotlb_gather, + struct page **freelist); extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, struct scatterlist *sg,unsigned int nents, int prot); extern size_t iommu_map_sg_atomic(struct iommu_domain *domain, @@ -518,12 +524,20 @@ extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr) extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev, unsigned long iova, int flags);
-static inline void iommu_flush_tlb_all(struct iommu_domain *domain) +static inline void iommu_flush_iotlb_all(struct iommu_domain *domain) { if (domain->ops->flush_iotlb_all) domain->ops->flush_iotlb_all(domain); }
+static inline void flush_iotlb_range(struct iommu_domain *domain, + unsigned long iova, size_t size, + struct page *freelist) +{ + if (domain->ops->flush_iotlb_range) + domain->ops->flush_iotlb_range(domain, iova, size, freelist); +} + static inline void iommu_tlb_sync(struct iommu_domain *domain, struct iommu_iotlb_gather *iotlb_gather) { @@ -699,7 +713,8 @@ static inline size_t iommu_unmap(struct iommu_domain *domain,
static inline size_t iommu_unmap_fast(struct iommu_domain *domain, unsigned long iova, int gfp_order, - struct iommu_iotlb_gather *iotlb_gather) + struct iommu_iotlb_gather *iotlb_gather, + struct page **freelist) { return 0; } @@ -718,7 +733,7 @@ static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain, return 0; }
-static inline void iommu_flush_tlb_all(struct iommu_domain *domain) +static inline void iommu_flush_iotlb_all(struct iommu_domain *domain) { }