diff options
Diffstat (limited to 'drivers/iommu/ipmmu-vmsa.c')
| -rw-r--r-- | drivers/iommu/ipmmu-vmsa.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 56e84bcc9532..408ad0b25919 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -36,7 +36,10 @@ #define arm_iommu_detach_device(...) do {} while (0) #endif -#define IPMMU_CTX_MAX 8U +#define IPMMU_CTX_MAX 8U +#define IPMMU_CTX_INVALID -1 + +#define IPMMU_UTLB_MAX 48U struct ipmmu_features { bool use_ns_alias_offset; @@ -58,6 +61,7 @@ struct ipmmu_vmsa_device { spinlock_t lock; /* Protects ctx and domains[] */ DECLARE_BITMAP(ctx, IPMMU_CTX_MAX); struct ipmmu_vmsa_domain *domains[IPMMU_CTX_MAX]; + s8 utlb_ctx[IPMMU_UTLB_MAX]; struct iommu_group *group; struct dma_iommu_mapping *mapping; @@ -335,6 +339,7 @@ static void ipmmu_utlb_enable(struct ipmmu_vmsa_domain *domain, ipmmu_write(mmu, IMUCTR(utlb), IMUCTR_TTSEL_MMU(domain->context_id) | IMUCTR_FLUSH | IMUCTR_MMUEN); + mmu->utlb_ctx[utlb] = domain->context_id; } /* @@ -346,6 +351,7 @@ static void ipmmu_utlb_disable(struct ipmmu_vmsa_domain *domain, struct ipmmu_vmsa_device *mmu = domain->mmu; ipmmu_write(mmu, IMUCTR(utlb), 0); + mmu->utlb_ctx[utlb] = IPMMU_CTX_INVALID; } static void ipmmu_tlb_flush_all(void *cookie) @@ -1043,6 +1049,7 @@ static int ipmmu_probe(struct platform_device *pdev) spin_lock_init(&mmu->lock); bitmap_zero(mmu->ctx, IPMMU_CTX_MAX); mmu->features = of_device_get_match_data(&pdev->dev); + memset(mmu->utlb_ctx, IPMMU_CTX_INVALID, mmu->features->num_utlbs); dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40)); /* Map I/O memory and request IRQ. */ @@ -1158,10 +1165,48 @@ static int ipmmu_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int ipmmu_resume_noirq(struct device *dev) +{ + struct ipmmu_vmsa_device *mmu = dev_get_drvdata(dev); + unsigned int i; + + /* Reset root MMU and restore contexts */ + if (ipmmu_is_root(mmu)) { + ipmmu_device_reset(mmu); + + for (i = 0; i < mmu->num_ctx; i++) { + if (!mmu->domains[i]) + continue; + + ipmmu_domain_setup_context(mmu->domains[i]); + } + } + + /* Re-enable active micro-TLBs */ + for (i = 0; i < mmu->features->num_utlbs; i++) { + if (mmu->utlb_ctx[i] == IPMMU_CTX_INVALID) + continue; + + ipmmu_utlb_enable(mmu->root->domains[mmu->utlb_ctx[i]], i); + } + + return 0; +} + +static const struct dev_pm_ops ipmmu_pm = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, ipmmu_resume_noirq) +}; +#define DEV_PM_OPS &ipmmu_pm +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + static struct platform_driver ipmmu_driver = { .driver = { .name = "ipmmu-vmsa", .of_match_table = of_match_ptr(ipmmu_of_ids), + .pm = DEV_PM_OPS, }, .probe = ipmmu_probe, .remove = ipmmu_remove, |