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-rw-r--r--drivers/iommu/amd_iommu.c36
-rw-r--r--drivers/iommu/arm-smmu-v3.c10
-rw-r--r--drivers/iommu/arm-smmu.c20
-rw-r--r--drivers/iommu/dma-iommu.c24
-rw-r--r--drivers/iommu/dmar.c7
-rw-r--r--drivers/iommu/exynos-iommu.c23
-rw-r--r--drivers/iommu/intel-iommu.c28
-rw-r--r--drivers/iommu/io-pgtable-arm-v7s.c7
-rw-r--r--drivers/iommu/io-pgtable-arm.c7
-rw-r--r--drivers/iommu/iova.c216
-rw-r--r--drivers/iommu/ipmmu-vmsa.c10
-rw-r--r--drivers/iommu/mtk_iommu.c7
-rw-r--r--drivers/iommu/omap-iommu.c375
-rw-r--r--drivers/iommu/omap-iommu.h30
-rw-r--r--drivers/iommu/qcom_iommu.c15
15 files changed, 506 insertions, 309 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 8e8874d23717..9dc7facfd2e5 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -63,7 +63,6 @@
/* IO virtual address start page frame number */
#define IOVA_START_PFN (1)
#define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT)
-#define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32))
/* Reserved IOVA ranges */
#define MSI_RANGE_START (0xfee00000)
@@ -1547,10 +1546,11 @@ static unsigned long dma_ops_alloc_iova(struct device *dev,
if (dma_mask > DMA_BIT_MASK(32))
pfn = alloc_iova_fast(&dma_dom->iovad, pages,
- IOVA_PFN(DMA_BIT_MASK(32)));
+ IOVA_PFN(DMA_BIT_MASK(32)), false);
if (!pfn)
- pfn = alloc_iova_fast(&dma_dom->iovad, pages, IOVA_PFN(dma_mask));
+ pfn = alloc_iova_fast(&dma_dom->iovad, pages,
+ IOVA_PFN(dma_mask), true);
return (pfn << PAGE_SHIFT);
}
@@ -1788,8 +1788,7 @@ static struct dma_ops_domain *dma_ops_domain_alloc(void)
if (!dma_dom->domain.pt_root)
goto free_dma_dom;
- init_iova_domain(&dma_dom->iovad, PAGE_SIZE,
- IOVA_START_PFN, DMA_32BIT_PFN);
+ init_iova_domain(&dma_dom->iovad, PAGE_SIZE, IOVA_START_PFN);
if (init_iova_flush_queue(&dma_dom->iovad, iova_domain_flush_tlb, NULL))
goto free_dma_dom;
@@ -2696,8 +2695,7 @@ static int init_reserved_iova_ranges(void)
struct pci_dev *pdev = NULL;
struct iova *val;
- init_iova_domain(&reserved_iova_ranges, PAGE_SIZE,
- IOVA_START_PFN, DMA_32BIT_PFN);
+ init_iova_domain(&reserved_iova_ranges, PAGE_SIZE, IOVA_START_PFN);
lockdep_set_class(&reserved_iova_ranges.iova_rbtree_lock,
&reserved_rbtree_key);
@@ -3663,11 +3661,11 @@ out_unlock:
return table;
}
-static int alloc_irq_index(u16 devid, int count)
+static int alloc_irq_index(u16 devid, int count, bool align)
{
struct irq_remap_table *table;
+ int index, c, alignment = 1;
unsigned long flags;
- int index, c;
struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
if (!iommu)
@@ -3677,16 +3675,22 @@ static int alloc_irq_index(u16 devid, int count)
if (!table)
return -ENODEV;
+ if (align)
+ alignment = roundup_pow_of_two(count);
+
spin_lock_irqsave(&table->lock, flags);
/* Scan table for free entries */
- for (c = 0, index = table->min_index;
+ for (index = ALIGN(table->min_index, alignment), c = 0;
index < MAX_IRQS_PER_TABLE;
- ++index) {
- if (!iommu->irte_ops->is_allocated(table, index))
+ index++) {
+ if (!iommu->irte_ops->is_allocated(table, index)) {
c += 1;
- else
- c = 0;
+ } else {
+ c = 0;
+ index = ALIGN(index, alignment);
+ continue;
+ }
if (c == count) {
for (; c != 0; --c)
@@ -4099,7 +4103,9 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
else
ret = -ENOMEM;
} else {
- index = alloc_irq_index(devid, nr_irqs);
+ bool align = (info->type == X86_IRQ_ALLOC_TYPE_MSI);
+
+ index = alloc_irq_index(devid, nr_irqs, align);
}
if (index < 0) {
pr_warn("Failed to allocate IRTE\n");
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index e67ba6c40faf..ee0c7b73cff7 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1743,6 +1743,14 @@ arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size)
return ops->unmap(ops, iova, size);
}
+static void arm_smmu_iotlb_sync(struct iommu_domain *domain)
+{
+ struct arm_smmu_device *smmu = to_smmu_domain(domain)->smmu;
+
+ if (smmu)
+ __arm_smmu_tlb_sync(smmu);
+}
+
static phys_addr_t
arm_smmu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
{
@@ -1963,6 +1971,8 @@ static struct iommu_ops arm_smmu_ops = {
.map = arm_smmu_map,
.unmap = arm_smmu_unmap,
.map_sg = default_iommu_map_sg,
+ .flush_iotlb_all = arm_smmu_iotlb_sync,
+ .iotlb_sync = arm_smmu_iotlb_sync,
.iova_to_phys = arm_smmu_iova_to_phys,
.add_device = arm_smmu_add_device,
.remove_device = arm_smmu_remove_device,
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 3bdb799d3b4b..e4a82d70d446 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -250,6 +250,7 @@ enum arm_smmu_domain_stage {
struct arm_smmu_domain {
struct arm_smmu_device *smmu;
struct io_pgtable_ops *pgtbl_ops;
+ const struct iommu_gather_ops *tlb_ops;
struct arm_smmu_cfg cfg;
enum arm_smmu_domain_stage stage;
struct mutex init_mutex; /* Protects smmu pointer */
@@ -735,7 +736,6 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
enum io_pgtable_fmt fmt;
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
- const struct iommu_gather_ops *tlb_ops;
mutex_lock(&smmu_domain->init_mutex);
if (smmu_domain->smmu)
@@ -813,7 +813,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
ias = min(ias, 32UL);
oas = min(oas, 32UL);
}
- tlb_ops = &arm_smmu_s1_tlb_ops;
+ smmu_domain->tlb_ops = &arm_smmu_s1_tlb_ops;
break;
case ARM_SMMU_DOMAIN_NESTED:
/*
@@ -833,9 +833,9 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
oas = min(oas, 40UL);
}
if (smmu->version == ARM_SMMU_V2)
- tlb_ops = &arm_smmu_s2_tlb_ops_v2;
+ smmu_domain->tlb_ops = &arm_smmu_s2_tlb_ops_v2;
else
- tlb_ops = &arm_smmu_s2_tlb_ops_v1;
+ smmu_domain->tlb_ops = &arm_smmu_s2_tlb_ops_v1;
break;
default:
ret = -EINVAL;
@@ -863,7 +863,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
.pgsize_bitmap = smmu->pgsize_bitmap,
.ias = ias,
.oas = oas,
- .tlb = tlb_ops,
+ .tlb = smmu_domain->tlb_ops,
.iommu_dev = smmu->dev,
};
@@ -1259,6 +1259,14 @@ static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
return ops->unmap(ops, iova, size);
}
+static void arm_smmu_iotlb_sync(struct iommu_domain *domain)
+{
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
+
+ if (smmu_domain->tlb_ops)
+ smmu_domain->tlb_ops->tlb_sync(smmu_domain);
+}
+
static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
dma_addr_t iova)
{
@@ -1562,6 +1570,8 @@ static struct iommu_ops arm_smmu_ops = {
.map = arm_smmu_map,
.unmap = arm_smmu_unmap,
.map_sg = default_iommu_map_sg,
+ .flush_iotlb_all = arm_smmu_iotlb_sync,
+ .iotlb_sync = arm_smmu_iotlb_sync,
.iova_to_phys = arm_smmu_iova_to_phys,
.add_device = arm_smmu_add_device,
.remove_device = arm_smmu_remove_device,
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 9d1cebe7f6cb..25914d36c5ac 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -292,18 +292,7 @@ int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base,
/* ...then finally give it a kicking to make sure it fits */
base_pfn = max_t(unsigned long, base_pfn,
domain->geometry.aperture_start >> order);
- end_pfn = min_t(unsigned long, end_pfn,
- domain->geometry.aperture_end >> order);
}
- /*
- * PCI devices may have larger DMA masks, but still prefer allocating
- * within a 32-bit mask to avoid DAC addressing. Such limitations don't
- * apply to the typical platform device, so for those we may as well
- * leave the cache limit at the top of their range to save an rb_last()
- * traversal on every allocation.
- */
- if (dev && dev_is_pci(dev))
- end_pfn &= DMA_BIT_MASK(32) >> order;
/* start_pfn is always nonzero for an already-initialised domain */
if (iovad->start_pfn) {
@@ -312,16 +301,11 @@ int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base,
pr_warn("Incompatible range for DMA domain\n");
return -EFAULT;
}
- /*
- * If we have devices with different DMA masks, move the free
- * area cache limit down for the benefit of the smaller one.
- */
- iovad->dma_32bit_pfn = min(end_pfn + 1, iovad->dma_32bit_pfn);
return 0;
}
- init_iova_domain(iovad, 1UL << order, base_pfn, end_pfn);
+ init_iova_domain(iovad, 1UL << order, base_pfn);
if (!dev)
return 0;
@@ -386,10 +370,12 @@ static dma_addr_t iommu_dma_alloc_iova(struct iommu_domain *domain,
/* Try to get PCI devices a SAC address */
if (dma_limit > DMA_BIT_MASK(32) && dev_is_pci(dev))
- iova = alloc_iova_fast(iovad, iova_len, DMA_BIT_MASK(32) >> shift);
+ iova = alloc_iova_fast(iovad, iova_len,
+ DMA_BIT_MASK(32) >> shift, false);
if (!iova)
- iova = alloc_iova_fast(iovad, iova_len, dma_limit >> shift);
+ iova = alloc_iova_fast(iovad, iova_len, dma_limit >> shift,
+ true);
return (dma_addr_t)iova << shift;
}
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 57c920c1372d..1ea7cd537873 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -801,13 +801,16 @@ int __init dmar_dev_scope_init(void)
dmar_free_pci_notify_info(info);
}
}
-
- bus_register_notifier(&pci_bus_type, &dmar_pci_bus_nb);
}
return dmar_dev_scope_status;
}
+void dmar_register_bus_notifier(void)
+{
+ bus_register_notifier(&pci_bus_type, &dmar_pci_bus_nb);
+}
+
int __init dmar_table_init(void)
{
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 25c2c75f5332..79c45650f8de 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -263,6 +263,7 @@ struct exynos_iommu_domain {
struct sysmmu_drvdata {
struct device *sysmmu; /* SYSMMU controller device */
struct device *master; /* master device (owner) */
+ struct device_link *link; /* runtime PM link to master */
void __iomem *sfrbase; /* our registers */
struct clk *clk; /* SYSMMU's clock */
struct clk *aclk; /* SYSMMU's aclk clock */
@@ -1250,6 +1251,8 @@ static struct iommu_group *get_device_iommu_group(struct device *dev)
static int exynos_iommu_add_device(struct device *dev)
{
+ struct exynos_iommu_owner *owner = dev->archdata.iommu;
+ struct sysmmu_drvdata *data;
struct iommu_group *group;
if (!has_sysmmu(dev))
@@ -1260,6 +1263,15 @@ static int exynos_iommu_add_device(struct device *dev)
if (IS_ERR(group))
return PTR_ERR(group);
+ list_for_each_entry(data, &owner->controllers, owner_node) {
+ /*
+ * SYSMMU will be runtime activated via device link
+ * (dependency) to its master device, so there are no
+ * direct calls to pm_runtime_get/put in this driver.
+ */
+ data->link = device_link_add(dev, data->sysmmu,
+ DL_FLAG_PM_RUNTIME);
+ }
iommu_group_put(group);
return 0;
@@ -1268,6 +1280,7 @@ static int exynos_iommu_add_device(struct device *dev)
static void exynos_iommu_remove_device(struct device *dev)
{
struct exynos_iommu_owner *owner = dev->archdata.iommu;
+ struct sysmmu_drvdata *data;
if (!has_sysmmu(dev))
return;
@@ -1283,6 +1296,9 @@ static void exynos_iommu_remove_device(struct device *dev)
}
}
iommu_group_remove_device(dev);
+
+ list_for_each_entry(data, &owner->controllers, owner_node)
+ device_link_del(data->link);
}
static int exynos_iommu_of_xlate(struct device *dev,
@@ -1316,13 +1332,6 @@ static int exynos_iommu_of_xlate(struct device *dev,
list_add_tail(&data->owner_node, &owner->controllers);
data->master = dev;
- /*
- * SYSMMU will be runtime activated via device link (dependency) to its
- * master device, so there are no direct calls to pm_runtime_get/put
- * in this driver.
- */
- device_link_add(dev, data->sysmmu, DL_FLAG_PM_RUNTIME);
-
return 0;
}
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 6784a05dd6b2..a0babdbf7146 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -82,8 +82,6 @@
#define IOVA_START_PFN (1)
#define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT)
-#define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32))
-#define DMA_64BIT_PFN IOVA_PFN(DMA_BIT_MASK(64))
/* page table handling */
#define LEVEL_STRIDE (9)
@@ -1878,8 +1876,7 @@ static int dmar_init_reserved_ranges(void)
struct iova *iova;
int i;
- init_iova_domain(&reserved_iova_list, VTD_PAGE_SIZE, IOVA_START_PFN,
- DMA_32BIT_PFN);
+ init_iova_domain(&reserved_iova_list, VTD_PAGE_SIZE, IOVA_START_PFN);
lockdep_set_class(&reserved_iova_list.iova_rbtree_lock,
&reserved_rbtree_key);
@@ -1938,8 +1935,7 @@ static int domain_init(struct dmar_domain *domain, struct intel_iommu *iommu,
unsigned long sagaw;
int err;
- init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN,
- DMA_32BIT_PFN);
+ init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN);
err = init_iova_flush_queue(&domain->iovad,
iommu_flush_iova, iova_entry_free);
@@ -2058,7 +2054,7 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
if (context_copied(context)) {
u16 did_old = context_domain_id(context);
- if (did_old >= 0 && did_old < cap_ndoms(iommu->cap)) {
+ if (did_old < cap_ndoms(iommu->cap)) {
iommu->flush.flush_context(iommu, did_old,
(((u16)bus) << 8) | devfn,
DMA_CCMD_MASK_NOBIT,
@@ -3473,11 +3469,12 @@ static unsigned long intel_alloc_iova(struct device *dev,
* from higher range
*/
iova_pfn = alloc_iova_fast(&domain->iovad, nrpages,
- IOVA_PFN(DMA_BIT_MASK(32)));
+ IOVA_PFN(DMA_BIT_MASK(32)), false);
if (iova_pfn)
return iova_pfn;
}
- iova_pfn = alloc_iova_fast(&domain->iovad, nrpages, IOVA_PFN(dma_mask));
+ iova_pfn = alloc_iova_fast(&domain->iovad, nrpages,
+ IOVA_PFN(dma_mask), true);
if (unlikely(!iova_pfn)) {
pr_err("Allocating %ld-page iova for %s failed",
nrpages, dev_name(dev));
@@ -4752,6 +4749,16 @@ int __init intel_iommu_init(void)
goto out_free_dmar;
}
+ up_write(&dmar_global_lock);
+
+ /*
+ * The bus notifier takes the dmar_global_lock, so lockdep will
+ * complain later when we register it under the lock.
+ */
+ dmar_register_bus_notifier();
+
+ down_write(&dmar_global_lock);
+
if (no_iommu || dmar_disabled) {
/*
* We exit the function here to ensure IOMMU's remapping and
@@ -4897,8 +4904,7 @@ static int md_domain_init(struct dmar_domain *domain, int guest_width)
{
int adjust_width;
- init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN,
- DMA_32BIT_PFN);
+ init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN);
domain_reserve_special_ranges(domain);
/* calculate AGAW */
diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index 6961fc393f0b..2ca08dc9331c 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -660,16 +660,11 @@ static int arm_v7s_unmap(struct io_pgtable_ops *ops, unsigned long iova,
size_t size)
{
struct arm_v7s_io_pgtable *data = io_pgtable_ops_to_data(ops);
- size_t unmapped;
if (WARN_ON(upper_32_bits(iova)))
return 0;
- unmapped = __arm_v7s_unmap(data, iova, size, 1, data->pgd);
- if (unmapped)
- io_pgtable_tlb_sync(&data->iop);
-
- return unmapped;
+ return __arm_v7s_unmap(data, iova, size, 1, data->pgd);
}
static phys_addr_t arm_v7s_iova_to_phys(struct io_pgtable_ops *ops,
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
index e8018a308868..51e5c43caed1 100644
--- a/drivers/iommu/io-pgtable-arm.c
+++ b/drivers/iommu/io-pgtable-arm.c
@@ -609,7 +609,6 @@ static int __arm_lpae_unmap(struct arm_lpae_io_pgtable *data,
static int arm_lpae_unmap(struct io_pgtable_ops *ops, unsigned long iova,
size_t size)
{
- size_t unmapped;
struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops);
arm_lpae_iopte *ptep = data->pgd;
int lvl = ARM_LPAE_START_LVL(data);
@@ -617,11 +616,7 @@ static int arm_lpae_unmap(struct io_pgtable_ops *ops, unsigned long iova,
if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias)))
return 0;
- unmapped = __arm_lpae_unmap(data, iova, size, lvl, ptep);
- if (unmapped)
- io_pgtable_tlb_sync(&data->iop);
-
- return unmapped;
+ return __arm_lpae_unmap(data, iova, size, lvl, ptep);
}
static phys_addr_t arm_lpae_iova_to_phys(struct io_pgtable_ops *ops,
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index 33edfa794ae9..84bda3a4dafc 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -24,6 +24,9 @@
#include <linux/bitops.h>
#include <linux/cpu.h>
+/* The anchor node sits above the top of the usable address space */
+#define IOVA_ANCHOR ~0UL
+
static bool iova_rcache_insert(struct iova_domain *iovad,
unsigned long pfn,
unsigned long size);
@@ -37,7 +40,7 @@ static void fq_flush_timeout(unsigned long data);
void
init_iova_domain(struct iova_domain *iovad, unsigned long granule,
- unsigned long start_pfn, unsigned long pfn_32bit)
+ unsigned long start_pfn)
{
/*
* IOVA granularity will normally be equal to the smallest
@@ -48,12 +51,16 @@ init_iova_domain(struct iova_domain *iovad, unsigned long granule,
spin_lock_init(&iovad->iova_rbtree_lock);
iovad->rbroot = RB_ROOT;
- iovad->cached32_node = NULL;
+ iovad->cached_node = &iovad->anchor.node;
+ iovad->cached32_node = &iovad->anchor.node;
iovad->granule = granule;
iovad->start_pfn = start_pfn;
- iovad->dma_32bit_pfn = pfn_32bit + 1;
+ iovad->dma_32bit_pfn = 1UL << (32 - iova_shift(iovad));
iovad->flush_cb = NULL;
iovad->fq = NULL;
+ iovad->anchor.pfn_lo = iovad->anchor.pfn_hi = IOVA_ANCHOR;
+ rb_link_node(&iovad->anchor.node, NULL, &iovad->rbroot.rb_node);
+ rb_insert_color(&iovad->anchor.node, &iovad->rbroot);
init_iova_rcaches(iovad);
}
EXPORT_SYMBOL_GPL(init_iova_domain);
@@ -108,50 +115,36 @@ int init_iova_flush_queue(struct iova_domain *iovad,
EXPORT_SYMBOL_GPL(init_iova_flush_queue);
static struct rb_node *
-__get_cached_rbnode(struct iova_domain *iovad, unsigned long *limit_pfn)
+__get_cached_rbnode(struct iova_domain *iovad, unsigned long limit_pfn)
{
- if ((*limit_pfn > iovad->dma_32bit_pfn) ||
- (iovad->cached32_node == NULL))
- return rb_last(&iovad->rbroot);
- else {
- struct rb_node *prev_node = rb_prev(iovad->cached32_node);
- struct iova *curr_iova =
- rb_entry(iovad->cached32_node, struct iova, node);
- *limit_pfn = curr_iova->pfn_lo;
- return prev_node;
- }
+ if (limit_pfn <= iovad->dma_32bit_pfn)
+ return iovad->cached32_node;
+
+ return iovad->cached_node;
}
static void
-__cached_rbnode_insert_update(struct iova_domain *iovad,
- unsigned long limit_pfn, struct iova *new)
+__cached_rbnode_insert_update(struct iova_domain *iovad, struct iova *new)
{
- if (limit_pfn != iovad->dma_32bit_pfn)
- return;
- iovad->cached32_node = &new->node;
+ if (new->pfn_hi < iovad->dma_32bit_pfn)
+ iovad->cached32_node = &new->node;
+ else
+ iovad->cached_node = &new->node;
}
static void
__cached_rbnode_delete_update(struct iova_domain *iovad, struct iova *free)
{
struct iova *cached_iova;
- struct rb_node *curr;
- if (!iovad->cached32_node)
- return;
- curr = iovad->cached32_node;
- cached_iova = rb_entry(curr, struct iova, node);
-
- if (free->pfn_lo >= cached_iova->pfn_lo) {
- struct rb_node *node = rb_next(&free->node);
- struct iova *iova = rb_entry(node, struct iova, node);
+ cached_iova = rb_entry(iovad->cached32_node, struct iova, node);
+ if (free->pfn_hi < iovad->dma_32bit_pfn &&
+ free->pfn_lo >= cached_iova->pfn_lo)
+ iovad->cached32_node = rb_next(&free->node);
- /* only cache if it's below 32bit pfn */
- if (node && iova->pfn_lo < iovad->dma_32bit_pfn)
- iovad->cached32_node = node;
- else
- iovad->cached32_node = NULL;
- }
+ cached_iova = rb_entry(iovad->cached_node, struct iova, node);
+ if (free->pfn_lo >= cached_iova->pfn_lo)
+ iovad->cached_node = rb_next(&free->node);
}
/* Insert the iova into domain rbtree by holding writer lock */
@@ -182,63 +175,43 @@ iova_insert_rbtree(struct rb_root *root, struct iova *iova,
rb_insert_color(&iova->node, root);
}
-/*
- * Computes the padding size required, to make the start address
- * naturally aligned on the power-of-two order of its size
- */
-static unsigned int
-iova_get_pad_size(unsigned int size, unsigned int limit_pfn)
-{
- return (limit_pfn - size) & (__roundup_pow_of_two(size) - 1);
-}
-
static int __alloc_and_insert_iova_range(struct iova_domain *iovad,
unsigned long size, unsigned long limit_pfn,
struct iova *new, bool size_aligned)
{
- struct rb_node *prev, *curr = NULL;
+ struct rb_node *curr, *prev;
+ struct iova *curr_iova;
unsigned long flags;
- unsigned long saved_pfn;
- unsigned int pad_size = 0;
+ unsigned long new_pfn;
+ unsigned long align_mask = ~0UL;
+
+ if (size_aligned)
+ align_mask <<= fls_long(size - 1);
/* Walk the tree backwards */
spin_lock_irqsave(&iovad->iova_rbtree_lock, flags);
- saved_pfn = limit_pfn;
- curr = __get_cached_rbnode(iovad, &limit_pfn);
- prev = curr;
- while (curr) {
- struct iova *curr_iova = rb_entry(curr, struct iova, node);
-
- if (limit_pfn <= curr_iova->pfn_lo) {
- goto move_left;
- } else if (limit_pfn > curr_iova->pfn_hi) {
- if (size_aligned)
- pad_size = iova_get_pad_size(size, limit_pfn);
- if ((curr_iova->pfn_hi + size + pad_size) < limit_pfn)
- break; /* found a free slot */
- }
- limit_pfn = curr_iova->pfn_lo;
-move_left:
+ curr = __get_cached_rbnode(iovad, limit_pfn);
+ curr_iova = rb_entry(curr, struct iova, node);
+ do {
+ limit_pfn = min(limit_pfn, curr_iova->pfn_lo);
+ new_pfn = (limit_pfn - size) & align_mask;
prev = curr;
curr = rb_prev(curr);
- }
+ curr_iova = rb_entry(curr, struct iova, node);
+ } while (curr && new_pfn <= curr_iova->pfn_hi);
- if (!curr) {
- if (size_aligned)
- pad_size = iova_get_pad_size(size, limit_pfn);
- if ((iovad->start_pfn + size + pad_size) > limit_pfn) {
- spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags);
- return -ENOMEM;
- }
+ if (limit_pfn < size || new_pfn < iovad->start_pfn) {
+ spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags);
+ return -ENOMEM;
}
/* pfn_lo will point to size aligned address if size_aligned is set */
- new->pfn_lo = limit_pfn - (size + pad_size);
+ new->pfn_lo = new_pfn;
new->pfn_hi = new->pfn_lo + size - 1;
/* If we have 'prev', it's a valid place to start the insertion. */
iova_insert_rbtree(&iovad->rbroot, new, prev);
- __cached_rbnode_insert_update(iovad, saved_pfn, new);
+ __cached_rbnode_insert_update(iovad, new);
spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags);
@@ -258,7 +231,8 @@ EXPORT_SYMBOL(alloc_iova_mem);
void free_iova_mem(struct iova *iova)
{
- kmem_cache_free(iova_cache, iova);
+ if (iova->pfn_lo != IOVA_ANCHOR)
+ kmem_cache_free(iova_cache, iova);
}
EXPORT_SYMBOL(free_iova_mem);
@@ -342,15 +316,12 @@ private_find_iova(struct iova_domain *iovad, unsigned long pfn)
while (node) {
struct iova *iova = rb_entry(node, struct iova, node);
- /* If pfn falls within iova's range, return iova */
- if ((pfn >= iova->pfn_lo) && (pfn <= iova->pfn_hi)) {
- return iova;
- }
-
if (pfn < iova->pfn_lo)
node = node->rb_left;
- else if (pfn > iova->pfn_lo)
+ else if (pfn > iova->pfn_hi)
node = node->rb_right;
+ else
+ return iova; /* pfn falls within iova's range */
}
return NULL;
@@ -424,18 +395,19 @@ EXPORT_SYMBOL_GPL(free_iova);
* @iovad: - iova domain in question
* @size: - size of page frames to allocate
* @limit_pfn: - max limit address
+ * @flush_rcache: - set to flush rcache on regular allocation failure
* This function tries to satisfy an iova allocation from the rcache,
- * and falls back to regular allocation on failure.
+ * and falls back to regular allocation on failure. If regular allocation
+ * fails too and the flush_rcache flag is set then the rcache will be flushed.
*/
unsigned long
alloc_iova_fast(struct iova_domain *iovad, unsigned long size,
- unsigned long limit_pfn)
+ unsigned long limit_pfn, bool flush_rcache)
{
- bool flushed_rcache = false;
unsigned long iova_pfn;
struct iova *new_iova;
- iova_pfn = iova_rcache_get(iovad, size, limit_pfn);
+ iova_pfn = iova_rcache_get(iovad, size, limit_pfn + 1);
if (iova_pfn)
return iova_pfn;
@@ -444,11 +416,11 @@ retry:
if (!new_iova) {
unsigned int cpu;
- if (flushed_rcache)
+ if (!flush_rcache)
return 0;
/* Try replenishing IOVAs by flushing rcache. */
- flushed_rcache = true;
+ flush_rcache = false;
for_each_online_cpu(cpu)
free_cpu_cached_iovas(cpu, iovad);
goto retry;
@@ -612,21 +584,12 @@ EXPORT_SYMBOL_GPL(queue_iova);
*/
void put_iova_domain(struct iova_domain *iovad)
{
- struct rb_node *node;
- unsigned long flags;
+ struct iova *iova, *tmp;
free_iova_flush_queue(iovad);
free_iova_rcaches(iovad);
- spin_lock_irqsave(&iovad->iova_rbtree_lock, flags);
- node = rb_first(&iovad->rbroot);
- while (node) {
- struct iova *iova = rb_entry(node, struct iova, node);
-
- rb_erase(node, &iovad->rbroot);
+ rbtree_postorder_for_each_entry_safe(iova, tmp, &iovad->rbroot, node)
free_iova_mem(iova);
- node = rb_first(&iovad->rbroot);
- }
- spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags);
}
EXPORT_SYMBOL_GPL(put_iova_domain);
@@ -695,6 +658,10 @@ reserve_iova(struct iova_domain *iovad,
struct iova *iova;
unsigned int overlap = 0;
+ /* Don't allow nonsensical pfns */
+ if (WARN_ON((pfn_hi | pfn_lo) > (ULLONG_MAX >> iova_shift(iovad))))
+ return NULL;
+
spin_lock_irqsave(&iovad->iova_rbtree_lock, flags);
for (node = rb_first(&iovad->rbroot); node; node = rb_next(node)) {
if (__is_range_overlap(node, pfn_lo, pfn_hi)) {
@@ -738,6 +705,9 @@ copy_reserved_iova(struct iova_domain *from, struct iova_domain *to)
struct iova *iova = rb_entry(node, struct iova, node);
struct iova *new_iova;
+ if (iova->pfn_lo == IOVA_ANCHOR)
+ continue;
+
new_iova = reserve_iova(to, iova->pfn_lo, iova->pfn_hi);
if (!new_iova)
printk(KERN_ERR "Reserve iova range %lx@%lx failed\n",
@@ -855,12 +825,21 @@ static bool iova_magazine_empty(struct iova_magazine *mag)
static unsigned long iova_magazine_pop(struct iova_magazine *mag,
unsigned long limit_pfn)
{
+ int i;
+ unsigned long pfn;
+
BUG_ON(iova_magazine_empty(mag));
- if (mag->pfns[mag->size - 1] >= limit_pfn)
- return 0;
+ /* Only fall back to the rbtree if we have no suitable pfns at all */
+ for (i = mag->size - 1; mag->pfns[i] > limit_pfn; i--)
+ if (i == 0)
+ return 0;
+
+ /* Swap it to pop it */
+ pfn = mag->pfns[i];
+ mag->pfns[i] = mag->pfns[--mag->size];
- return mag->pfns[--mag->size];
+ return pfn;
}
static void iova_magazine_push(struct iova_magazine *mag, unsigned long pfn)
@@ -1011,27 +990,7 @@ static unsigned long iova_rcache_get(struct iova_domain *iovad,
if (log_size >= IOVA_RANGE_CACHE_MAX_SIZE)
return 0;
- return __iova_rcache_get(&iovad->rcaches[log_size], limit_pfn);
-}
-
-/*
- * Free a cpu's rcache.
- */
-static void free_cpu_iova_rcache(unsigned int cpu, struct iova_domain *iovad,
- struct iova_rcache *rcache)
-{
- struct iova_cpu_rcache *cpu_rcache = per_cpu_ptr(rcache->cpu_rcaches, cpu);
- unsigned long flags;
-
- spin_lock_irqsave(&cpu_rcache->lock, flags);
-
- iova_magazine_free_pfns(cpu_rcache->loaded, iovad);
- iova_magazine_free(cpu_rcache->loaded);
-
- iova_magazine_free_pfns(cpu_rcache->prev, iovad);
- iova_magazine_free(cpu_rcache->prev);
-
- spin_unlock_irqrestore(&cpu_rcache->lock, flags);
+ return __iova_rcache_get(&iovad->rcaches[log_size], limit_pfn - size);
}
/*
@@ -1040,21 +999,20 @@ static void free_cpu_iova_rcache(unsigned int cpu, struct iova_domain *iovad,
static void free_iova_rcaches(struct iova_domain *iovad)
{
struct iova_rcache *rcache;
- unsigned long flags;
+ struct iova_cpu_rcache *cpu_rcache;
unsigned int cpu;
int i, j;
for (i = 0; i < IOVA_RANGE_CACHE_MAX_SIZE; ++i) {
rcache = &iovad->rcaches[i];
- for_each_possible_cpu(cpu)
- free_cpu_iova_rcache(cpu, iovad, rcache);
- spin_lock_irqsave(&rcache->lock, flags);
+ for_each_possible_cpu(cpu) {
+ cpu_rcache = per_cpu_ptr(rcache->cpu_rcaches, cpu);
+ iova_magazine_free(cpu_rcache->loaded);
+ iova_magazine_free(cpu_rcache->prev);
+ }
free_percpu(rcache->cpu_rcaches);
- for (j = 0; j < rcache->depot_size; ++j) {
- iova_magazine_free_pfns(rcache->depot[j], iovad);
+ for (j = 0; j < rcache->depot_size; ++j)
iova_magazine_free(rcache->depot[j]);
- }
- spin_unlock_irqrestore(&rcache->lock, flags);
}
}
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 195d6e93ac71..af8140054273 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -619,6 +619,14 @@ static size_t ipmmu_unmap(struct iommu_domain *io_domain, unsigned long iova,
return domain->iop->unmap(domain->iop, iova, size);
}
+static void ipmmu_iotlb_sync(struct iommu_domain *io_domain)
+{
+ struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
+
+ if (domain->mmu)
+ ipmmu_tlb_flush_all(domain);
+}
+
static phys_addr_t ipmmu_iova_to_phys(struct iommu_domain *io_domain,
dma_addr_t iova)
{
@@ -876,6 +884,8 @@ static const struct iommu_ops ipmmu_ops = {
.detach_dev = ipmmu_detach_device,
.map = ipmmu_map,
.unmap = ipmmu_unmap,
+ .flush_iotlb_all = ipmmu_iotlb_sync,
+ .iotlb_sync = ipmmu_iotlb_sync,
.map_sg = default_iommu_map_sg,
.iova_to_phys = ipmmu_iova_to_phys,
.add_device = ipmmu_add_device_dma,
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 16d33ac19db0..f227d73e7bf6 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -392,6 +392,11 @@ static size_t mtk_iommu_unmap(struct iommu_domain *domain,
return unmapsz;
}
+static void mtk_iommu_iotlb_sync(struct iommu_domain *domain)
+{
+ mtk_iommu_tlb_sync(mtk_iommu_get_m4u_data());
+}
+
static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
dma_addr_t iova)
{
@@ -491,6 +496,8 @@ static struct iommu_ops mtk_iommu_ops = {
.map = mtk_iommu_map,
.unmap = mtk_iommu_unmap,
.map_sg = default_iommu_map_sg,
+ .flush_iotlb_all = mtk_iommu_iotlb_sync,
+ .iotlb_sync = mtk_iommu_iotlb_sync,
.iova_to_phys = mtk_iommu_iova_to_phys,
.add_device = mtk_iommu_add_device,
.remove_device = mtk_iommu_remove_device,
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index bd67e1b2c64e..e135ab830ebf 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -2,6 +2,7 @@
* omap iommu: tlb and pagetable primitives
*
* Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2013-2017 Texas Instruments Incorporated - http://www.ti.com/
*
* Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>,
* Paul Mundt and Toshihiro Kobayashi
@@ -71,13 +72,23 @@ static struct omap_iommu_domain *to_omap_domain(struct iommu_domain *dom)
**/
void omap_iommu_save_ctx(struct device *dev)
{
- struct omap_iommu *obj = dev_to_omap_iommu(dev);
- u32 *p = obj->ctx;
+ struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
+ struct omap_iommu *obj;
+ u32 *p;
int i;
- for (i = 0; i < (MMU_REG_SIZE / sizeof(u32)); i++) {
- p[i] = iommu_read_reg(obj, i * sizeof(u32));
- dev_dbg(obj->dev, "%s\t[%02d] %08x\n", __func__, i, p[i]);
+ if (!arch_data)
+ return;
+
+ while (arch_data->iommu_dev) {
+ obj = arch_data->iommu_dev;
+ p = obj->ctx;
+ for (i = 0; i < (MMU_REG_SIZE / sizeof(u32)); i++) {
+ p[i] = iommu_read_reg(obj, i * sizeof(u32));
+ dev_dbg(obj->dev, "%s\t[%02d] %08x\n", __func__, i,
+ p[i]);
+ }
+ arch_data++;
}
}
EXPORT_SYMBOL_GPL(omap_iommu_save_ctx);
@@ -88,13 +99,23 @@ EXPORT_SYMBOL_GPL(omap_iommu_save_ctx);
**/
void omap_iommu_restore_ctx(struct device *dev)
{
- struct omap_iommu *obj = dev_to_omap_iommu(dev);
- u32 *p = obj->ctx;
+ struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
+ struct omap_iommu *obj;
+ u32 *p;
int i;
- for (i = 0; i < (MMU_REG_SIZE / sizeof(u32)); i++) {
- iommu_write_reg(obj, p[i], i * sizeof(u32));
- dev_dbg(obj->dev, "%s\t[%02d] %08x\n", __func__, i, p[i]);
+ if (!arch_data)
+ return;
+
+ while (arch_data->iommu_dev) {
+ obj = arch_data->iommu_dev;
+ p = obj->ctx;
+ for (i = 0; i < (MMU_REG_SIZE / sizeof(u32)); i++) {
+ iommu_write_reg(obj, p[i], i * sizeof(u32));
+ dev_dbg(obj->dev, "%s\t[%02d] %08x\n", __func__, i,
+ p[i]);
+ }
+ arch_data++;
}
}
EXPORT_SYMBOL_GPL(omap_iommu_restore_ctx);
@@ -805,7 +826,7 @@ static irqreturn_t iommu_fault_handler(int irq, void *data)
struct iommu_domain *domain = obj->domain;
struct omap_iommu_domain *omap_domain = to_omap_domain(domain);
- if (!omap_domain->iommu_dev)
+ if (!omap_domain->dev)
return IRQ_NONE;
errs = iommu_report_fault(obj, &da);
@@ -893,6 +914,24 @@ static void omap_iommu_detach(struct omap_iommu *obj)
dev_dbg(obj->dev, "%s: %s\n", __func__, obj->name);
}
+static bool omap_iommu_can_register(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+
+ if (!of_device_is_compatible(np, "ti,dra7-dsp-iommu"))
+ return true;
+
+ /*
+ * restrict IOMMU core registration only for processor-port MDMA MMUs
+ * on DRA7 DSPs
+ */
+ if ((!strcmp(dev_name(&pdev->dev), "40d01000.mmu")) ||
+ (!strcmp(dev_name(&pdev->dev), "41501000.mmu")))
+ return true;
+
+ return false;
+}
+
static int omap_iommu_dra7_get_dsp_system_cfg(struct platform_device *pdev,
struct omap_iommu *obj)
{
@@ -984,19 +1023,22 @@ static int omap_iommu_probe(struct platform_device *pdev)
return err;
platform_set_drvdata(pdev, obj);
- obj->group = iommu_group_alloc();
- if (IS_ERR(obj->group))
- return PTR_ERR(obj->group);
+ if (omap_iommu_can_register(pdev)) {
+ obj->group = iommu_group_alloc();
+ if (IS_ERR(obj->group))
+ return PTR_ERR(obj->group);
- err = iommu_device_sysfs_add(&obj->iommu, obj->dev, NULL, obj->name);
- if (err)
- goto out_group;
+ err = iommu_device_sysfs_add(&obj->iommu, obj->dev, NULL,
+ obj->name);
+ if (err)
+ goto out_group;
- iommu_device_set_ops(&obj->iommu, &omap_iommu_ops);
+ iommu_device_set_ops(&obj->iommu, &omap_iommu_ops);
- err = iommu_device_register(&obj->iommu);
- if (err)
- goto out_sysfs;
+ err = iommu_device_register(&obj->iommu);
+ if (err)
+ goto out_sysfs;
+ }
pm_runtime_irq_safe(obj->dev);
pm_runtime_enable(obj->dev);
@@ -1018,11 +1060,13 @@ static int omap_iommu_remove(struct platform_device *pdev)
{
struct omap_iommu *obj = platform_get_drvdata(pdev);
- iommu_group_put(obj->group);
- obj->group = NULL;
+ if (obj->group) {
+ iommu_group_put(obj->group);
+ obj->group = NULL;
- iommu_device_sysfs_remove(&obj->iommu);
- iommu_device_unregister(&obj->iommu);
+ iommu_device_sysfs_remove(&obj->iommu);
+ iommu_device_unregister(&obj->iommu);
+ }
omap_iommu_debugfs_remove(obj);
@@ -1068,11 +1112,13 @@ static int omap_iommu_map(struct iommu_domain *domain, unsigned long da,
phys_addr_t pa, size_t bytes, int prot)
{
struct omap_iommu_domain *omap_domain = to_omap_domain(domain);
- struct omap_iommu *oiommu = omap_domain->iommu_dev;
- struct device *dev = oiommu->dev;
+ struct device *dev = omap_domain->dev;
+ struct omap_iommu_device *iommu;
+ struct omap_iommu *oiommu;
struct iotlb_entry e;
int omap_pgsz;
- u32 ret;
+ u32 ret = -EINVAL;
+ int i;
omap_pgsz = bytes_to_iopgsz(bytes);
if (omap_pgsz < 0) {
@@ -1084,9 +1130,24 @@ static int omap_iommu_map(struct iommu_domain *domain, unsigned long da,
iotlb_init_entry(&e, da, pa, omap_pgsz);
- ret = omap_iopgtable_store_entry(oiommu, &e);
- if (ret)
- dev_err(dev, "omap_iopgtable_store_entry failed: %d\n", ret);
+ iommu = omap_domain->iommus;
+ for (i = 0; i < omap_domain->num_iommus; i++, iommu++) {
+ oiommu = iommu->iommu_dev;
+ ret = omap_iopgtable_store_entry(oiommu, &e);
+ if (ret) {
+ dev_err(dev, "omap_iopgtable_store_entry failed: %d\n",
+ ret);
+ break;
+ }
+ }
+
+ if (ret) {
+ while (i--) {
+ iommu--;
+ oiommu = iommu->iommu_dev;
+ iopgtable_clear_entry(oiommu, da);
+ }
+ }
return ret;
}
@@ -1095,12 +1156,90 @@ static size_t omap_iommu_unmap(struct iommu_domain *domain, unsigned long da,
size_t size)
{
struct omap_iommu_domain *omap_domain = to_omap_domain(domain);
- struct omap_iommu *oiommu = omap_domain->iommu_dev;
- struct device *dev = oiommu->dev;
+ struct device *dev = omap_domain->dev;
+ struct omap_iommu_device *iommu;
+ struct omap_iommu *oiommu;
+ bool error = false;
+ size_t bytes = 0;
+ int i;
dev_dbg(dev, "unmapping da 0x%lx size %u\n", da, size);
- return iopgtable_clear_entry(oiommu, da);
+ iommu = omap_domain->iommus;
+ for (i = 0; i < omap_domain->num_iommus; i++, iommu++) {
+ oiommu = iommu->iommu_dev;
+ bytes = iopgtable_clear_entry(oiommu, da);
+ if (!bytes)
+ error = true;
+ }
+
+ /*
+ * simplify return - we are only checking if any of the iommus
+ * reported an error, but not if all of them are unmapping the
+ * same number of entries. This should not occur due to the
+ * mirror programming.
+ */
+ return error ? 0 : bytes;
+}
+
+static int omap_iommu_count(struct device *dev)
+{
+ struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
+ int count = 0;
+
+ while (arch_data->iommu_dev) {
+ count++;
+ arch_data++;
+ }
+
+ return count;
+}
+
+/* caller should call cleanup if this function fails */
+static int omap_iommu_attach_init(struct device *dev,
+ struct omap_iommu_domain *odomain)
+{
+ struct omap_iommu_device *iommu;
+ int i;
+
+ odomain->num_iommus = omap_iommu_count(dev);
+ if (!odomain->num_iommus)
+ return -EINVAL;
+
+ odomain->iommus = kcalloc(odomain->num_iommus, sizeof(*iommu),
+ GFP_ATOMIC);
+ if (!odomain->iommus)
+ return -ENOMEM;
+
+ iommu = odomain->iommus;
+ for (i = 0; i < odomain->num_iommus; i++, iommu++) {
+ iommu->pgtable = kzalloc(IOPGD_TABLE_SIZE, GFP_ATOMIC);
+ if (!iommu->pgtable)
+ return -ENOMEM;
+
+ /*
+ * should never fail, but please keep this around to ensure
+ * we keep the hardware happy
+ */
+ if (WARN_ON(!IS_ALIGNED((long)iommu->pgtable,
+ IOPGD_TABLE_SIZE)))
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void omap_iommu_detach_fini(struct omap_iommu_domain *odomain)
+{
+ int i;
+ struct omap_iommu_device *iommu = odomain->iommus;
+
+ for (i = 0; iommu && i < odomain->num_iommus; i++, iommu++)
+ kfree(iommu->pgtable);
+
+ kfree(odomain->iommus);
+ odomain->num_iommus = 0;
+ odomain->iommus = NULL;
}
static int
@@ -1108,8 +1247,10 @@ omap_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
struct omap_iommu_domain *omap_domain = to_omap_domain(domain);
struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
+ struct omap_iommu_device *iommu;
struct omap_iommu *oiommu;
int ret = 0;
+ int i;
if (!arch_data || !arch_data->iommu_dev) {
dev_err(dev, "device doesn't have an associated iommu\n");
@@ -1118,26 +1259,49 @@ omap_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
spin_lock(&omap_domain->lock);
- /* only a single device is supported per domain for now */
- if (omap_domain->iommu_dev) {
+ /* only a single client device can be attached to a domain */
+ if (omap_domain->dev) {
dev_err(dev, "iommu domain is already attached\n");
ret = -EBUSY;
goto out;
}
- oiommu = arch_data->iommu_dev;
-
- /* get a handle to and enable the omap iommu */
- ret = omap_iommu_attach(oiommu, omap_domain->pgtable);
+ ret = omap_iommu_attach_init(dev, omap_domain);
if (ret) {
- dev_err(dev, "can't get omap iommu: %d\n", ret);
- goto out;
+ dev_err(dev, "failed to allocate required iommu data %d\n",
+ ret);
+ goto init_fail;
+ }
+
+ iommu = omap_domain->iommus;
+ for (i = 0; i < omap_domain->num_iommus; i++, iommu++, arch_data++) {
+ /* configure and enable the omap iommu */
+ oiommu = arch_data->iommu_dev;
+ ret = omap_iommu_attach(oiommu, iommu->pgtable);
+ if (ret) {
+ dev_err(dev, "can't get omap iommu: %d\n", ret);
+ goto attach_fail;
+ }
+
+ oiommu->domain = domain;
+ iommu->iommu_dev = oiommu;
}
- omap_domain->iommu_dev = oiommu;
omap_domain->dev = dev;
- oiommu->domain = domain;
+ goto out;
+
+attach_fail:
+ while (i--) {
+ iommu--;
+ arch_data--;
+ oiommu = iommu->iommu_dev;
+ omap_iommu_detach(oiommu);
+ iommu->iommu_dev = NULL;
+ oiommu->domain = NULL;
+ }
+init_fail:
+ omap_iommu_detach_fini(omap_domain);
out:
spin_unlock(&omap_domain->lock);
return ret;
@@ -1146,21 +1310,40 @@ out:
static void _omap_iommu_detach_dev(struct omap_iommu_domain *omap_domain,
struct device *dev)
{
- struct omap_iommu *oiommu = dev_to_omap_iommu(dev);
+ struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
+ struct omap_iommu_device *iommu = omap_domain->iommus;
+ struct omap_iommu *oiommu;
+ int i;
+
+ if (!omap_domain->dev) {
+ dev_err(dev, "domain has no attached device\n");
+ return;
+ }
/* only a single device is supported per domain for now */
- if (omap_domain->iommu_dev != oiommu) {
- dev_err(dev, "invalid iommu device\n");
+ if (omap_domain->dev != dev) {
+ dev_err(dev, "invalid attached device\n");
return;
}
- iopgtable_clear_entry_all(oiommu);
+ /*
+ * cleanup in the reverse order of attachment - this addresses
+ * any h/w dependencies between multiple instances, if any
+ */
+ iommu += (omap_domain->num_iommus - 1);
+ arch_data += (omap_domain->num_iommus - 1);
+ for (i = 0; i < omap_domain->num_iommus; i++, iommu--, arch_data--) {
+ oiommu = iommu->iommu_dev;
+ iopgtable_clear_entry_all(oiommu);
+
+ omap_iommu_detach(oiommu);
+ iommu->iommu_dev = NULL;
+ oiommu->domain = NULL;
+ }
- omap_iommu_detach(oiommu);
+ omap_iommu_detach_fini(omap_domain);
- omap_domain->iommu_dev = NULL;
omap_domain->dev = NULL;
- oiommu->domain = NULL;
}
static void omap_iommu_detach_dev(struct iommu_domain *domain,
@@ -1182,18 +1365,7 @@ static struct iommu_domain *omap_iommu_domain_alloc(unsigned type)
omap_domain = kzalloc(sizeof(*omap_domain), GFP_KERNEL);
if (!omap_domain)
- goto out;
-
- omap_domain->pgtable = kzalloc(IOPGD_TABLE_SIZE, GFP_KERNEL);
- if (!omap_domain->pgtable)
- goto fail_nomem;
-
- /*
- * should never fail, but please keep this around to ensure
- * we keep the hardware happy
- */
- if (WARN_ON(!IS_ALIGNED((long)omap_domain->pgtable, IOPGD_TABLE_SIZE)))
- goto fail_align;
+ return NULL;
spin_lock_init(&omap_domain->lock);
@@ -1202,13 +1374,6 @@ static struct iommu_domain *omap_iommu_domain_alloc(unsigned type)
omap_domain->domain.geometry.force_aperture = true;
return &omap_domain->domain;
-
-fail_align:
- kfree(omap_domain->pgtable);
-fail_nomem:
- kfree(omap_domain);
-out:
- return NULL;
}
static void omap_iommu_domain_free(struct iommu_domain *domain)
@@ -1219,10 +1384,9 @@ static void omap_iommu_domain_free(struct iommu_domain *domain)
* An iommu device is still attached
* (currently, only one device can be attached) ?
*/
- if (omap_domain->iommu_dev)
+ if (omap_domain->dev)
_omap_iommu_detach_dev(omap_domain, omap_domain->dev);
- kfree(omap_domain->pgtable);
kfree(omap_domain);
}
@@ -1230,11 +1394,16 @@ static phys_addr_t omap_iommu_iova_to_phys(struct iommu_domain *domain,
dma_addr_t da)
{
struct omap_iommu_domain *omap_domain = to_omap_domain(domain);
- struct omap_iommu *oiommu = omap_domain->iommu_dev;
+ struct omap_iommu_device *iommu = omap_domain->iommus;
+ struct omap_iommu *oiommu = iommu->iommu_dev;
struct device *dev = oiommu->dev;
u32 *pgd, *pte;
phys_addr_t ret = 0;
+ /*
+ * all the iommus within the domain will have identical programming,
+ * so perform the lookup using just the first iommu
+ */
iopgtable_lookup_entry(oiommu, da, &pgd, &pte);
if (pte) {
@@ -1260,11 +1429,12 @@ static phys_addr_t omap_iommu_iova_to_phys(struct iommu_domain *domain,
static int omap_iommu_add_device(struct device *dev)
{
- struct omap_iommu_arch_data *arch_data;
+ struct omap_iommu_arch_data *arch_data, *tmp;
struct omap_iommu *oiommu;
struct iommu_group *group;
struct device_node *np;
struct platform_device *pdev;
+ int num_iommus, i;
int ret;
/*
@@ -1276,36 +1446,57 @@ static int omap_iommu_add_device(struct device *dev)
if (!dev->of_node)
return 0;
- np = of_parse_phandle(dev->of_node, "iommus", 0);
- if (!np)
+ /*
+ * retrieve the count of IOMMU nodes using phandle size as element size
+ * since #iommu-cells = 0 for OMAP
+ */
+ num_iommus = of_property_count_elems_of_size(dev->of_node, "iommus",
+ sizeof(phandle));
+ if (num_iommus < 0)
return 0;
- pdev = of_find_device_by_node(np);
- if (WARN_ON(!pdev)) {
- of_node_put(np);
- return -EINVAL;
- }
+ arch_data = kzalloc((num_iommus + 1) * sizeof(*arch_data), GFP_KERNEL);
+ if (!arch_data)
+ return -ENOMEM;
- oiommu = platform_get_drvdata(pdev);
- if (!oiommu) {
- of_node_put(np);
- return -EINVAL;
- }
+ for (i = 0, tmp = arch_data; i < num_iommus; i++, tmp++) {
+ np = of_parse_phandle(dev->of_node, "iommus", i);
+ if (!np) {
+ kfree(arch_data);
+ return -EINVAL;
+ }
+
+ pdev = of_find_device_by_node(np);
+ if (WARN_ON(!pdev)) {
+ of_node_put(np);
+ kfree(arch_data);
+ return -EINVAL;
+ }
+
+ oiommu = platform_get_drvdata(pdev);
+ if (!oiommu) {
+ of_node_put(np);
+ kfree(arch_data);
+ return -EINVAL;
+ }
+
+ tmp->iommu_dev = oiommu;
- arch_data = kzalloc(sizeof(*arch_data), GFP_KERNEL);
- if (!arch_data) {
of_node_put(np);
- return -ENOMEM;
}
+ /*
+ * use the first IOMMU alone for the sysfs device linking.
+ * TODO: Evaluate if a single iommu_group needs to be
+ * maintained for both IOMMUs
+ */
+ oiommu = arch_data->iommu_dev;
ret = iommu_device_link(&oiommu->iommu, dev);
if (ret) {
kfree(arch_data);
- of_node_put(np);
return ret;
}
- arch_data->iommu_dev = oiommu;
dev->archdata.iommu = arch_data;
/*
@@ -1321,8 +1512,6 @@ static int omap_iommu_add_device(struct device *dev)
}
iommu_group_put(group);
- of_node_put(np);
-
return 0;
}
diff --git a/drivers/iommu/omap-iommu.h b/drivers/iommu/omap-iommu.h
index a675af29a6ec..1703159ef5af 100644
--- a/drivers/iommu/omap-iommu.h
+++ b/drivers/iommu/omap-iommu.h
@@ -29,17 +29,26 @@ struct iotlb_entry {
};
/**
+ * struct omap_iommu_device - omap iommu device data
+ * @pgtable: page table used by an omap iommu attached to a domain
+ * @iommu_dev: pointer to store an omap iommu instance attached to a domain
+ */
+struct omap_iommu_device {
+ u32 *pgtable;
+ struct omap_iommu *iommu_dev;
+};
+
+/**
* struct omap_iommu_domain - omap iommu domain
- * @pgtable: the page table
- * @iommu_dev: an omap iommu device attached to this domain. only a single
- * iommu device can be attached for now.
+ * @num_iommus: number of iommus in this domain
+ * @iommus: omap iommu device data for all iommus in this domain
* @dev: Device using this domain.
* @lock: domain lock, should be taken when attaching/detaching
* @domain: generic domain handle used by iommu core code
*/
struct omap_iommu_domain {
- u32 *pgtable;
- struct omap_iommu *iommu_dev;
+ u32 num_iommus;
+ struct omap_iommu_device *iommus;
struct device *dev;
spinlock_t lock;
struct iommu_domain domain;
@@ -97,17 +106,6 @@ struct iotlb_lock {
short vict;
};
-/**
- * dev_to_omap_iommu() - retrieves an omap iommu object from a user device
- * @dev: iommu client device
- */
-static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
-{
- struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
-
- return arch_data->iommu_dev;
-}
-
/*
* MMU Register offsets
*/
diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c
index c8a587d034b0..4a2c4378b3db 100644
--- a/drivers/iommu/qcom_iommu.c
+++ b/drivers/iommu/qcom_iommu.c
@@ -443,6 +443,19 @@ static size_t qcom_iommu_unmap(struct iommu_domain *domain, unsigned long iova,
return ret;
}
+static void qcom_iommu_iotlb_sync(struct iommu_domain *domain)
+{
+ struct qcom_iommu_domain *qcom_domain = to_qcom_iommu_domain(domain);
+ struct io_pgtable *pgtable = container_of(qcom_domain->pgtbl_ops,
+ struct io_pgtable, ops);
+ if (!qcom_domain->pgtbl_ops)
+ return;
+
+ pm_runtime_get_sync(qcom_domain->iommu->dev);
+ qcom_iommu_tlb_sync(pgtable->cookie);
+ pm_runtime_put_sync(qcom_domain->iommu->dev);
+}
+
static phys_addr_t qcom_iommu_iova_to_phys(struct iommu_domain *domain,
dma_addr_t iova)
{
@@ -570,6 +583,8 @@ static const struct iommu_ops qcom_iommu_ops = {
.map = qcom_iommu_map,
.unmap = qcom_iommu_unmap,
.map_sg = default_iommu_map_sg,
+ .flush_iotlb_all = qcom_iommu_iotlb_sync,
+ .iotlb_sync = qcom_iommu_iotlb_sync,
.iova_to_phys = qcom_iommu_iova_to_phys,
.add_device = qcom_iommu_add_device,
.remove_device = qcom_iommu_remove_device,
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-25 19:38:55 +0000