diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-24 13:10:38 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-24 13:10:38 -0700 |
commit | 18b8bfdfbae5821a7df691bc1e542bbab6c31e9c (patch) | |
tree | 4c7c1d942c71b19fc6430e4acbe5b2f5967ab93d /drivers/iommu/ipmmu-vmsa.c | |
parent | d972604f6f87478212f012af5560c4fd4bb2b01d (diff) | |
parent | 6488a7f35eeab463f6c9c2ea34d30ca856f0bc8e (diff) |
Merge tag 'iommu-updates-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
- PASID table handling updates for the Intel VT-d driver. It implements
a global PASID space now so that applications usings multiple devices
will just have one PASID.
- A new config option to make iommu passthroug mode the default.
- New sysfs attribute for iommu groups to export the type of the
default domain.
- A debugfs interface (for debug only) usable by IOMMU drivers to
export internals to user-space.
- R-Car Gen3 SoCs support for the ipmmu-vmsa driver
- The ARM-SMMU now aborts transactions from unknown devices and devices
not attached to any domain.
- Various cleanups and smaller fixes all over the place.
* tag 'iommu-updates-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (42 commits)
iommu/omap: Fix cache flushes on L2 table entries
iommu: Remove the ->map_sg indirection
iommu/arm-smmu-v3: Abort all transactions if SMMU is enabled in kdump kernel
iommu/arm-smmu-v3: Prevent any devices access to memory without registration
iommu/ipmmu-vmsa: Don't register as BUS IOMMU if machine doesn't have IPMMU-VMSA
iommu/ipmmu-vmsa: Clarify supported platforms
iommu/ipmmu-vmsa: Fix allocation in atomic context
iommu: Add config option to set passthrough as default
iommu: Add sysfs attribyte for domain type
iommu/arm-smmu-v3: sync the OVACKFLG to PRIQ consumer register
iommu/arm-smmu: Error out only if not enough context interrupts
iommu/io-pgtable-arm-v7s: Abort allocation when table address overflows the PTE
iommu/io-pgtable-arm: Fix pgtable allocation in selftest
iommu/vt-d: Remove the obsolete per iommu pasid tables
iommu/vt-d: Apply per pci device pasid table in SVA
iommu/vt-d: Allocate and free pasid table
iommu/vt-d: Per PCI device pasid table interfaces
iommu/vt-d: Add for_each_device_domain() helper
iommu/vt-d: Move device_domain_info to header
iommu/vt-d: Apply global PASID in SVA
...
Diffstat (limited to 'drivers/iommu/ipmmu-vmsa.c')
-rw-r--r-- | drivers/iommu/ipmmu-vmsa.c | 59 |
1 files changed, 46 insertions, 13 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index f026aa16d5f1..22b94f8a9a04 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -47,6 +47,7 @@ struct ipmmu_features { unsigned int number_of_contexts; bool setup_imbuscr; bool twobit_imttbcr_sl0; + bool reserved_context; }; struct ipmmu_vmsa_device { @@ -73,7 +74,7 @@ struct ipmmu_vmsa_domain { struct io_pgtable_ops *iop; unsigned int context_id; - spinlock_t lock; /* Protects mappings */ + struct mutex mutex; /* Protects mappings */ }; static struct ipmmu_vmsa_domain *to_vmsa_domain(struct iommu_domain *dom) @@ -194,7 +195,9 @@ static struct ipmmu_vmsa_device *to_ipmmu(struct device *dev) #define IMPMBA(n) (0x0280 + ((n) * 4)) #define IMPMBD(n) (0x02c0 + ((n) * 4)) -#define IMUCTR(n) (0x0300 + ((n) * 16)) +#define IMUCTR(n) ((n) < 32 ? IMUCTR0(n) : IMUCTR32(n)) +#define IMUCTR0(n) (0x0300 + ((n) * 16)) +#define IMUCTR32(n) (0x0600 + (((n) - 32) * 16)) #define IMUCTR_FIXADDEN (1 << 31) #define IMUCTR_FIXADD_MASK (0xff << 16) #define IMUCTR_FIXADD_SHIFT 16 @@ -204,7 +207,9 @@ static struct ipmmu_vmsa_device *to_ipmmu(struct device *dev) #define IMUCTR_FLUSH (1 << 1) #define IMUCTR_MMUEN (1 << 0) -#define IMUASID(n) (0x0308 + ((n) * 16)) +#define IMUASID(n) ((n) < 32 ? IMUASID0(n) : IMUASID32(n)) +#define IMUASID0(n) (0x0308 + ((n) * 16)) +#define IMUASID32(n) (0x0608 + (((n) - 32) * 16)) #define IMUASID_ASID8_MASK (0xff << 8) #define IMUASID_ASID8_SHIFT 8 #define IMUASID_ASID0_MASK (0xff << 0) @@ -595,7 +600,7 @@ static struct iommu_domain *__ipmmu_domain_alloc(unsigned type) if (!domain) return NULL; - spin_lock_init(&domain->lock); + mutex_init(&domain->mutex); return &domain->io_domain; } @@ -641,7 +646,6 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain, struct iommu_fwspec *fwspec = dev->iommu_fwspec; struct ipmmu_vmsa_device *mmu = to_ipmmu(dev); struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain); - unsigned long flags; unsigned int i; int ret = 0; @@ -650,7 +654,7 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain, return -ENXIO; } - spin_lock_irqsave(&domain->lock, flags); + mutex_lock(&domain->mutex); if (!domain->mmu) { /* The domain hasn't been used yet, initialize it. */ @@ -674,7 +678,7 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain, } else dev_info(dev, "Reusing IPMMU context %u\n", domain->context_id); - spin_unlock_irqrestore(&domain->lock, flags); + mutex_unlock(&domain->mutex); if (ret < 0) return ret; @@ -756,8 +760,12 @@ static bool ipmmu_slave_whitelist(struct device *dev) return false; } -static const struct soc_device_attribute soc_r8a7795[] = { +static const struct soc_device_attribute soc_rcar_gen3[] = { { .soc_id = "r8a7795", }, + { .soc_id = "r8a7796", }, + { .soc_id = "r8a77965", }, + { .soc_id = "r8a77970", }, + { .soc_id = "r8a77995", }, { /* sentinel */ } }; @@ -765,7 +773,7 @@ static int ipmmu_of_xlate(struct device *dev, struct of_phandle_args *spec) { /* For R-Car Gen3 use a white list to opt-in slave devices */ - if (soc_device_match(soc_r8a7795) && !ipmmu_slave_whitelist(dev)) + if (soc_device_match(soc_rcar_gen3) && !ipmmu_slave_whitelist(dev)) return -ENODEV; iommu_fwspec_add_ids(dev, spec->args, 1); @@ -889,7 +897,6 @@ static const struct iommu_ops ipmmu_ops = { .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, .remove_device = ipmmu_remove_device, @@ -917,14 +924,16 @@ static const struct ipmmu_features ipmmu_features_default = { .number_of_contexts = 1, /* software only tested with one context */ .setup_imbuscr = true, .twobit_imttbcr_sl0 = false, + .reserved_context = false, }; -static const struct ipmmu_features ipmmu_features_r8a7795 = { +static const struct ipmmu_features ipmmu_features_rcar_gen3 = { .use_ns_alias_offset = false, .has_cache_leaf_nodes = true, .number_of_contexts = 8, .setup_imbuscr = false, .twobit_imttbcr_sl0 = true, + .reserved_context = true, }; static const struct of_device_id ipmmu_of_ids[] = { @@ -933,7 +942,19 @@ static const struct of_device_id ipmmu_of_ids[] = { .data = &ipmmu_features_default, }, { .compatible = "renesas,ipmmu-r8a7795", - .data = &ipmmu_features_r8a7795, + .data = &ipmmu_features_rcar_gen3, + }, { + .compatible = "renesas,ipmmu-r8a7796", + .data = &ipmmu_features_rcar_gen3, + }, { + .compatible = "renesas,ipmmu-r8a77965", + .data = &ipmmu_features_rcar_gen3, + }, { + .compatible = "renesas,ipmmu-r8a77970", + .data = &ipmmu_features_rcar_gen3, + }, { + .compatible = "renesas,ipmmu-r8a77995", + .data = &ipmmu_features_rcar_gen3, }, { /* Terminator */ }, @@ -955,7 +976,7 @@ static int ipmmu_probe(struct platform_device *pdev) } mmu->dev = &pdev->dev; - mmu->num_utlbs = 32; + mmu->num_utlbs = 48; spin_lock_init(&mmu->lock); bitmap_zero(mmu->ctx, IPMMU_CTX_MAX); mmu->features = of_device_get_match_data(&pdev->dev); @@ -1018,6 +1039,11 @@ static int ipmmu_probe(struct platform_device *pdev) } ipmmu_device_reset(mmu); + + if (mmu->features->reserved_context) { + dev_info(&pdev->dev, "IPMMU context 0 is reserved\n"); + set_bit(0, mmu->ctx); + } } /* @@ -1081,12 +1107,19 @@ static struct platform_driver ipmmu_driver = { static int __init ipmmu_init(void) { + struct device_node *np; static bool setup_done; int ret; if (setup_done) return 0; + np = of_find_matching_node(NULL, ipmmu_of_ids); + if (!np) + return 0; + + of_node_put(np); + ret = platform_driver_register(&ipmmu_driver); if (ret < 0) return ret; |