208 static u32 ipmmu_ctx_read_root(struct ipmmu_vmsa_domain *domain,  in ipmmu_ctx_read_root()  argument
211 	return ipmmu_ctx_read(domain->mmu->root, domain->context_id, reg);  in ipmmu_ctx_read_root()
214 static void ipmmu_ctx_write_root(struct ipmmu_vmsa_domain *domain,  in ipmmu_ctx_write_root()  argument
217 	ipmmu_ctx_write(domain->mmu->root, domain->context_id, reg, data);  in ipmmu_ctx_write_root()
220 static void ipmmu_ctx_write_all(struct ipmmu_vmsa_domain *domain,  in ipmmu_ctx_write_all()  argument
223 	if (domain->mmu != domain->mmu->root)  in ipmmu_ctx_write_all()
224 		ipmmu_ctx_write(domain->mmu, domain->context_id, reg, data);  in ipmmu_ctx_write_all()
226 	ipmmu_ctx_write(domain->mmu->root, domain->context_id, reg, data);  in ipmmu_ctx_write_all()
251 static void ipmmu_tlb_sync(struct ipmmu_vmsa_domain *domain)  in ipmmu_tlb_sync()  argument
255 	while (ipmmu_ctx_read_root(domain, IMCTR) & IMCTR_FLUSH) {  in ipmmu_tlb_sync()
258 			dev_err_ratelimited(domain->mmu->dev,  in ipmmu_tlb_sync()
266 static void ipmmu_tlb_invalidate(struct ipmmu_vmsa_domain *domain)  in ipmmu_tlb_invalidate()  argument
270 	reg = ipmmu_ctx_read_root(domain, IMCTR);  in ipmmu_tlb_invalidate()
272 	ipmmu_ctx_write_all(domain, IMCTR, reg);  in ipmmu_tlb_invalidate()
274 	ipmmu_tlb_sync(domain);  in ipmmu_tlb_invalidate()
280 static void ipmmu_utlb_enable(struct ipmmu_vmsa_domain *domain,  in ipmmu_utlb_enable()  argument
283 	struct ipmmu_vmsa_device *mmu = domain->mmu;  in ipmmu_utlb_enable()
293 	ipmmu_imuctr_write(mmu, utlb, IMUCTR_TTSEL_MMU(domain->context_id) |  in ipmmu_utlb_enable()
295 	mmu->utlb_ctx[utlb] = domain->context_id;  in ipmmu_utlb_enable()
301 static void ipmmu_utlb_disable(struct ipmmu_vmsa_domain *domain,  in ipmmu_utlb_disable()  argument
304 	struct ipmmu_vmsa_device *mmu = domain->mmu;  in ipmmu_utlb_disable()
312 	struct ipmmu_vmsa_domain *domain = cookie;  in ipmmu_tlb_flush_all()  local
314 	ipmmu_tlb_invalidate(domain);  in ipmmu_tlb_flush_all()
329  * Domain/Context Management
333 					 struct ipmmu_vmsa_domain *domain)  in ipmmu_domain_allocate_context()  argument
342 		mmu->domains[ret] = domain;  in ipmmu_domain_allocate_context()
365 static void ipmmu_domain_setup_context(struct ipmmu_vmsa_domain *domain)  in ipmmu_domain_setup_context()  argument
371 	ttbr = domain->cfg.arm_lpae_s1_cfg.ttbr;  in ipmmu_domain_setup_context()
372 	ipmmu_ctx_write_root(domain, IMTTLBR0, ttbr);  in ipmmu_domain_setup_context()
373 	ipmmu_ctx_write_root(domain, IMTTUBR0, ttbr >> 32);  in ipmmu_domain_setup_context()
380 	if (domain->mmu->features->twobit_imttbcr_sl0)  in ipmmu_domain_setup_context()
385 	if (domain->mmu->features->cache_snoop)  in ipmmu_domain_setup_context()
389 	ipmmu_ctx_write_root(domain, IMTTBCR, IMTTBCR_EAE | tmp);  in ipmmu_domain_setup_context()
392 	ipmmu_ctx_write_root(domain, IMMAIR0,  in ipmmu_domain_setup_context()
393 			     domain->cfg.arm_lpae_s1_cfg.mair);  in ipmmu_domain_setup_context()
396 	if (domain->mmu->features->setup_imbuscr)  in ipmmu_domain_setup_context()
397 		ipmmu_ctx_write_root(domain, IMBUSCR,  in ipmmu_domain_setup_context()
398 				     ipmmu_ctx_read_root(domain, IMBUSCR) &  in ipmmu_domain_setup_context()
405 	ipmmu_ctx_write_root(domain, IMSTR, ipmmu_ctx_read_root(domain, IMSTR));  in ipmmu_domain_setup_context()
414 	ipmmu_ctx_write_all(domain, IMCTR,  in ipmmu_domain_setup_context()
418 static int ipmmu_domain_init_context(struct ipmmu_vmsa_domain *domain)  in ipmmu_domain_init_context()  argument
433 	domain->cfg.quirks = IO_PGTABLE_QUIRK_ARM_NS;  in ipmmu_domain_init_context()
434 	domain->cfg.pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K;  in ipmmu_domain_init_context()
435 	domain->cfg.ias = 32;  in ipmmu_domain_init_context()
436 	domain->cfg.oas = 40;  in ipmmu_domain_init_context()
437 	domain->cfg.tlb = &ipmmu_flush_ops;  in ipmmu_domain_init_context()
438 	domain->io_domain.geometry.aperture_end = DMA_BIT_MASK(32);  in ipmmu_domain_init_context()
439 	domain->io_domain.geometry.force_aperture = true;  in ipmmu_domain_init_context()
444 	domain->cfg.coherent_walk = false;  in ipmmu_domain_init_context()
445 	domain->cfg.iommu_dev = domain->mmu->root->dev;  in ipmmu_domain_init_context()
450 	ret = ipmmu_domain_allocate_context(domain->mmu->root, domain);  in ipmmu_domain_init_context()
454 	domain->context_id = ret;  in ipmmu_domain_init_context()
456 	domain->iop = alloc_io_pgtable_ops(ARM_32_LPAE_S1, &domain->cfg,  in ipmmu_domain_init_context()
457 					   domain);  in ipmmu_domain_init_context()
458 	if (!domain->iop) {  in ipmmu_domain_init_context()
459 		ipmmu_domain_free_context(domain->mmu->root,  in ipmmu_domain_init_context()
460 					  domain->context_id);  in ipmmu_domain_init_context()
464 	ipmmu_domain_setup_context(domain);  in ipmmu_domain_init_context()
468 static void ipmmu_domain_destroy_context(struct ipmmu_vmsa_domain *domain)  in ipmmu_domain_destroy_context()  argument
470 	if (!domain->mmu)  in ipmmu_domain_destroy_context()
479 	ipmmu_ctx_write_all(domain, IMCTR, IMCTR_FLUSH);  in ipmmu_domain_destroy_context()
480 	ipmmu_tlb_sync(domain);  in ipmmu_domain_destroy_context()
481 	ipmmu_domain_free_context(domain->mmu->root, domain->context_id);  in ipmmu_domain_destroy_context()
488 static irqreturn_t ipmmu_domain_irq(struct ipmmu_vmsa_domain *domain)  in ipmmu_domain_irq()  argument
491 	struct ipmmu_vmsa_device *mmu = domain->mmu;  in ipmmu_domain_irq()
495 	status = ipmmu_ctx_read_root(domain, IMSTR);  in ipmmu_domain_irq()
499 	iova = ipmmu_ctx_read_root(domain, IMELAR);  in ipmmu_domain_irq()
501 		iova |= (u64)ipmmu_ctx_read_root(domain, IMEUAR) << 32;  in ipmmu_domain_irq()
509 	ipmmu_ctx_write_root(domain, IMSTR, 0);  in ipmmu_domain_irq()
528 	if (!report_iommu_fault(&domain->io_domain, mmu->dev, iova, 0))  in ipmmu_domain_irq()
568 	struct ipmmu_vmsa_domain *domain;  in ipmmu_domain_alloc()  local
573 	domain = kzalloc(sizeof(*domain), GFP_KERNEL);  in ipmmu_domain_alloc()
574 	if (!domain)  in ipmmu_domain_alloc()
577 	mutex_init(&domain->mutex);  in ipmmu_domain_alloc()
579 	return &domain->io_domain;  in ipmmu_domain_alloc()
584 	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);  in ipmmu_domain_free()  local
587 	 * Free the domain resources. We assume that all devices have already  in ipmmu_domain_free()
590 	ipmmu_domain_destroy_context(domain);  in ipmmu_domain_free()
591 	free_io_pgtable_ops(domain->iop);  in ipmmu_domain_free()
592 	kfree(domain);  in ipmmu_domain_free()
600 	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);  in ipmmu_attach_device()  local
609 	mutex_lock(&domain->mutex);  in ipmmu_attach_device()
611 	if (!domain->mmu) {  in ipmmu_attach_device()
612 		/* The domain hasn't been used yet, initialize it. */  in ipmmu_attach_device()
613 		domain->mmu = mmu;  in ipmmu_attach_device()
614 		ret = ipmmu_domain_init_context(domain);  in ipmmu_attach_device()
617 			domain->mmu = NULL;  in ipmmu_attach_device()
620 				 domain->context_id);  in ipmmu_attach_device()
622 	} else if (domain->mmu != mmu) {  in ipmmu_attach_device()
625 		 * different IOMMUs to the same domain.  in ipmmu_attach_device()
627 		dev_err(dev, "Can't attach IPMMU %s to domain on IPMMU %s\n",  in ipmmu_attach_device()
628 			dev_name(mmu->dev), dev_name(domain->mmu->dev));  in ipmmu_attach_device()
631 		dev_info(dev, "Reusing IPMMU context %u\n", domain->context_id);  in ipmmu_attach_device()
633 	mutex_unlock(&domain->mutex);  in ipmmu_attach_device()
639 		ipmmu_utlb_enable(domain, fwspec->ids[i]);  in ipmmu_attach_device()
648 	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);  in ipmmu_detach_device()  local
652 		ipmmu_utlb_disable(domain, fwspec->ids[i]);  in ipmmu_detach_device()
662 	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);  in ipmmu_map()  local
664 	if (!domain)  in ipmmu_map()
667 	return domain->iop->map(domain->iop, iova, paddr, size, prot, gfp);  in ipmmu_map()
673 	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);  in ipmmu_unmap()  local
675 	return domain->iop->unmap(domain->iop, iova, size, gather);  in ipmmu_unmap()
680 	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);  in ipmmu_flush_iotlb_all()  local
682 	if (domain->mmu)  in ipmmu_flush_iotlb_all()
683 		ipmmu_tlb_flush_all(domain);  in ipmmu_flush_iotlb_all()
695 	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);  in ipmmu_iova_to_phys()  local
699 	return domain->iop->iova_to_phys(domain->iop, iova);  in ipmmu_iova_to_phys()
784 	 * VAs. This will allocate a corresponding IOMMU domain.  in ipmmu_init_arm_mapping()