#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;
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;
ipmmu_write(mmu, IMUCTR(utlb),
IMUCTR_TTSEL_MMU(domain->context_id) | IMUCTR_FLUSH |
IMUCTR_MMUEN);
+ mmu->utlb_ctx[utlb] = domain->context_id;
}
/*
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)
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. */
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,