1 // SPDX-License-Identifier: GPL-2.0-only
3  * Apple DART (Device Address Resolution Table) IOMMU driver
7  * Based on arm/arm-smmu/arm-ssmu.c and arm/arm-smmu-v3/arm-smmu-v3.c
10  * and on exynos-iommu.c
18 #include <linux/dma-mapping.h>
21 #include <linux/io-pgtable.h>
35 #include "dma-iommu.h"
144 #define DART_TCR(dart, sid) ((dart)->hw->tcr + ((sid) << 2))  argument
146 #define DART_TTBR(dart, sid, idx) ((dart)->hw->ttbr + \  argument
147 				   (((dart)->hw->ttbr_count * (sid)) << 2) + \
188  * Private structure associated with each DART device.
191  * @hw: SoC-specific hardware data
194  * @clks: clocks associated with this DART
196  * @lock: lock for hardware operations involving this dart
197  * @pgsize: pagesize supported by this DART
198  * @supports_bypass: indicates if this DART supports bypass mode
238  * and never changed again afterwards. Devices with different dart pointers
241  * @dart dart pointer
245 	struct apple_dart *dart;  member
249 	struct apple_dart *dart;  member
254  * This structure is attached to each iommu domain handled by a DART.
256  * @pgtbl_ops: pagetable ops allocated by io-pgtable
293 	for (i = 0, stream_map = &(base)->stream_maps[0];                      \
294 	     i < MAX_DARTS_PER_DEVICE && stream_map->dart;                     \
295 	     stream_map = &(base)->stream_maps[++i])
308 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_enable_translation()  local
311 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_enable_translation()
312 		writel(dart->hw->tcr_enabled, dart->regs + DART_TCR(dart, sid));  in apple_dart_hw_enable_translation()
317 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_disable_dma()  local
320 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_disable_dma()
321 		writel(dart->hw->tcr_disabled, dart->regs + DART_TCR(dart, sid));  in apple_dart_hw_disable_dma()
327 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_enable_bypass()  local
330 	WARN_ON(!stream_map->dart->supports_bypass);  in apple_dart_hw_enable_bypass()
331 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_enable_bypass()
332 		writel(dart->hw->tcr_bypass,  in apple_dart_hw_enable_bypass()
333 		       dart->regs + DART_TCR(dart, sid));  in apple_dart_hw_enable_bypass()
339 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_set_ttbr()  local
342 	WARN_ON(paddr & ((1 << dart->hw->ttbr_shift) - 1));  in apple_dart_hw_set_ttbr()
343 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_set_ttbr()
344 		writel(dart->hw->ttbr_valid |  in apple_dart_hw_set_ttbr()
345 		       (paddr >> dart->hw->ttbr_shift) << dart->hw->ttbr_addr_field_shift,  in apple_dart_hw_set_ttbr()
346 		       dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_hw_set_ttbr()
352 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_clear_ttbr()  local
355 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_clear_ttbr()
356 		writel(0, dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_hw_clear_ttbr()
364 	for (i = 0; i < stream_map->dart->hw->ttbr_count; ++i)  in apple_dart_hw_clear_all_ttbrs()
376 	spin_lock_irqsave(&stream_map->dart->lock, flags);  in apple_dart_t8020_hw_stream_command()
378 	writel(stream_map->sidmap[0], stream_map->dart->regs + DART_T8020_STREAM_SELECT);  in apple_dart_t8020_hw_stream_command()
379 	writel(command, stream_map->dart->regs + DART_T8020_STREAM_COMMAND);  in apple_dart_t8020_hw_stream_command()
382 		stream_map->dart->regs + DART_T8020_STREAM_COMMAND, command_reg,  in apple_dart_t8020_hw_stream_command()
386 	spin_unlock_irqrestore(&stream_map->dart->lock, flags);  in apple_dart_t8020_hw_stream_command()
389 		dev_err(stream_map->dart->dev,  in apple_dart_t8020_hw_stream_command()
391 			command, stream_map->sidmap[0]);  in apple_dart_t8020_hw_stream_command()
402 	struct apple_dart *dart = stream_map->dart;  in apple_dart_t8110_hw_tlb_command()  local
407 	spin_lock_irqsave(&dart->lock, flags);  in apple_dart_t8110_hw_tlb_command()
409 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams) {  in apple_dart_t8110_hw_tlb_command()
412 		writel(val, dart->regs + DART_T8110_TLB_CMD);  in apple_dart_t8110_hw_tlb_command()
415 			dart->regs + DART_T8110_TLB_CMD, val,  in apple_dart_t8110_hw_tlb_command()
424 	spin_unlock_irqrestore(&dart->lock, flags);  in apple_dart_t8110_hw_tlb_command()
427 		dev_err(stream_map->dart->dev,  in apple_dart_t8110_hw_tlb_command()
450 static int apple_dart_hw_reset(struct apple_dart *dart)  in apple_dart_hw_reset()  argument
456 	config = readl(dart->regs + dart->hw->lock);  in apple_dart_hw_reset()
457 	if (config & dart->hw->lock_bit) {  in apple_dart_hw_reset()
458 		dev_err(dart->dev, "DART is locked down until reboot: %08x\n",  in apple_dart_hw_reset()
460 		return -EINVAL;  in apple_dart_hw_reset()
463 	stream_map.dart = dart;  in apple_dart_hw_reset()
465 	bitmap_set(stream_map.sidmap, 0, dart->num_streams);  in apple_dart_hw_reset()
470 	for (i = 0; i < BITS_TO_U32(dart->num_streams); i++)  in apple_dart_hw_reset()
471 		writel(U32_MAX, dart->regs + dart->hw->enable_streams + 4 * i);  in apple_dart_hw_reset()
474 	writel(readl(dart->regs + dart->hw->error), dart->regs + dart->hw->error);  in apple_dart_hw_reset()
476 	if (dart->hw->type == DART_T8110)  in apple_dart_hw_reset()
477 		writel(0,  dart->regs + DART_T8110_ERROR_MASK);  in apple_dart_hw_reset()
479 	return dart->hw->invalidate_tlb(&stream_map);  in apple_dart_hw_reset()
489 		stream_map.dart = domain_stream_map->dart;  in apple_dart_domain_flush_tlb()
491 		for (j = 0; j < BITS_TO_LONGS(stream_map.dart->num_streams); j++)  in apple_dart_domain_flush_tlb()
492 			stream_map.sidmap[j] = atomic_long_read(&domain_stream_map->sidmap[j]);  in apple_dart_domain_flush_tlb()
494 		stream_map.dart->hw->invalidate_tlb(&stream_map);  in apple_dart_domain_flush_tlb()
519 	struct io_pgtable_ops *ops = dart_domain->pgtbl_ops;  in apple_dart_iova_to_phys()
524 	return ops->iova_to_phys(ops, iova);  in apple_dart_iova_to_phys()
533 	struct io_pgtable_ops *ops = dart_domain->pgtbl_ops;  in apple_dart_map_pages()
536 		return -ENODEV;  in apple_dart_map_pages()
538 	return ops->map_pages(ops, iova, paddr, pgsize, pgcount, prot, gfp,  in apple_dart_map_pages()
548 	struct io_pgtable_ops *ops = dart_domain->pgtbl_ops;  in apple_dart_unmap_pages()
550 	return ops->unmap_pages(ops, iova, pgsize, pgcount, gather);  in apple_dart_unmap_pages()
559 		&io_pgtable_ops_to_pgtable(domain->pgtbl_ops)->cfg;  in apple_dart_setup_translation()
561 	for (i = 0; i < pgtbl_cfg->apple_dart_cfg.n_ttbrs; ++i)  in apple_dart_setup_translation()
563 				       pgtbl_cfg->apple_dart_cfg.ttbr[i]);  in apple_dart_setup_translation()
564 	for (; i < stream_map->dart->hw->ttbr_count; ++i)  in apple_dart_setup_translation()
568 	stream_map->dart->hw->invalidate_tlb(stream_map);  in apple_dart_setup_translation()
575 	struct apple_dart *dart = cfg->stream_maps[0].dart;  in apple_dart_finalize_domain()  local
580 	mutex_lock(&dart_domain->init_lock);  in apple_dart_finalize_domain()
582 	if (dart_domain->finalized)  in apple_dart_finalize_domain()
586 		dart_domain->stream_maps[i].dart = cfg->stream_maps[i].dart;  in apple_dart_finalize_domain()
587 		for (j = 0; j < BITS_TO_LONGS(dart->num_streams); j++)  in apple_dart_finalize_domain()
588 			atomic_long_set(&dart_domain->stream_maps[i].sidmap[j],  in apple_dart_finalize_domain()
589 					cfg->stream_maps[i].sidmap[j]);  in apple_dart_finalize_domain()
593 		.pgsize_bitmap = dart->pgsize,  in apple_dart_finalize_domain()
594 		.ias = dart->ias,  in apple_dart_finalize_domain()
595 		.oas = dart->oas,  in apple_dart_finalize_domain()
597 		.iommu_dev = dart->dev,  in apple_dart_finalize_domain()
600 	dart_domain->pgtbl_ops =  in apple_dart_finalize_domain()
601 		alloc_io_pgtable_ops(dart->hw->fmt, &pgtbl_cfg, domain);  in apple_dart_finalize_domain()
602 	if (!dart_domain->pgtbl_ops) {  in apple_dart_finalize_domain()
603 		ret = -ENOMEM;  in apple_dart_finalize_domain()
607 	domain->pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;  in apple_dart_finalize_domain()
608 	domain->geometry.aperture_start = 0;  in apple_dart_finalize_domain()
609 	domain->geometry.aperture_end = (dma_addr_t)DMA_BIT_MASK(dart->ias);  in apple_dart_finalize_domain()
610 	domain->geometry.force_aperture = true;  in apple_dart_finalize_domain()
612 	dart_domain->finalized = true;  in apple_dart_finalize_domain()
615 	mutex_unlock(&dart_domain->init_lock);  in apple_dart_finalize_domain()
627 		if (domain_maps[i].dart != master_maps[i].dart)  in apple_dart_mod_streams()
628 			return -EINVAL;  in apple_dart_mod_streams()
632 		if (!domain_maps[i].dart)  in apple_dart_mod_streams()
634 		for (j = 0; j < BITS_TO_LONGS(domain_maps[i].dart->num_streams); j++) {  in apple_dart_mod_streams()
650 	return apple_dart_mod_streams(domain->stream_maps, cfg->stream_maps,  in apple_dart_domain_add_streams()
662 	if (cfg->stream_maps[0].dart->force_bypass &&  in apple_dart_attach_dev()
663 	    domain->type != IOMMU_DOMAIN_IDENTITY)  in apple_dart_attach_dev()
664 		return -EINVAL;  in apple_dart_attach_dev()
665 	if (!cfg->stream_maps[0].dart->supports_bypass &&  in apple_dart_attach_dev()
666 	    domain->type == IOMMU_DOMAIN_IDENTITY)  in apple_dart_attach_dev()
667 		return -EINVAL;  in apple_dart_attach_dev()
673 	switch (domain->type) {  in apple_dart_attach_dev()
702 		return ERR_PTR(-ENODEV);  in apple_dart_probe_device()
706 			dev, stream_map->dart->dev,  in apple_dart_probe_device()
709 	return &cfg->stream_maps[0].dart->iommu;  in apple_dart_probe_device()
732 	mutex_init(&dart_domain->init_lock);  in apple_dart_domain_alloc()
736 		dart_domain->finalized = true;  in apple_dart_domain_alloc()
738 	return &dart_domain->domain;  in apple_dart_domain_alloc()
745 	if (dart_domain->pgtbl_ops)  in apple_dart_domain_free()
746 		free_io_pgtable_ops(dart_domain->pgtbl_ops);  in apple_dart_domain_free()
754 	struct platform_device *iommu_pdev = of_find_device_by_node(args->np);  in apple_dart_of_xlate()
755 	struct apple_dart *dart = platform_get_drvdata(iommu_pdev);  in apple_dart_of_xlate()  local
759 	if (args->args_count != 1)  in apple_dart_of_xlate()
760 		return -EINVAL;  in apple_dart_of_xlate()
761 	sid = args->args[0];  in apple_dart_of_xlate()
766 		return -ENOMEM;  in apple_dart_of_xlate()
769 	cfg_dart = cfg->stream_maps[0].dart;  in apple_dart_of_xlate()
771 		if (cfg_dart->supports_bypass != dart->supports_bypass)  in apple_dart_of_xlate()
772 			return -EINVAL;  in apple_dart_of_xlate()
773 		if (cfg_dart->force_bypass != dart->force_bypass)  in apple_dart_of_xlate()
774 			return -EINVAL;  in apple_dart_of_xlate()
775 		if (cfg_dart->pgsize != dart->pgsize)  in apple_dart_of_xlate()
776 			return -EINVAL;  in apple_dart_of_xlate()
780 		if (cfg->stream_maps[i].dart == dart) {  in apple_dart_of_xlate()
781 			set_bit(sid, cfg->stream_maps[i].sidmap);  in apple_dart_of_xlate()
786 		if (!cfg->stream_maps[i].dart) {  in apple_dart_of_xlate()
787 			cfg->stream_maps[i].dart = dart;  in apple_dart_of_xlate()
788 			set_bit(sid, cfg->stream_maps[i].sidmap);  in apple_dart_of_xlate()
793 	return -EINVAL;  in apple_dart_of_xlate()
807 		for_each_set_bit(sid, stream_map->sidmap, stream_map->dart->num_streams)  in apple_dart_release_group()
808 			stream_map->dart->sid2group[sid] = NULL;  in apple_dart_release_group()
821 	 * just assume that both src and dst only have the same single DART.  in apple_dart_merge_master_cfg()
823 	if (src->stream_maps[1].dart)  in apple_dart_merge_master_cfg()
824 		return -EINVAL;  in apple_dart_merge_master_cfg()
825 	if (dst->stream_maps[1].dart)  in apple_dart_merge_master_cfg()
826 		return -EINVAL;  in apple_dart_merge_master_cfg()
827 	if (src->stream_maps[0].dart != dst->stream_maps[0].dart)  in apple_dart_merge_master_cfg()
828 		return -EINVAL;  in apple_dart_merge_master_cfg()
830 	bitmap_or(dst->stream_maps[0].sidmap,  in apple_dart_merge_master_cfg()
831 		  dst->stream_maps[0].sidmap,  in apple_dart_merge_master_cfg()
832 		  src->stream_maps[0].sidmap,  in apple_dart_merge_master_cfg()
833 		  dst->stream_maps[0].dart->num_streams);  in apple_dart_merge_master_cfg()
844 	struct iommu_group *res = ERR_PTR(-EINVAL);  in apple_dart_device_group()
849 		for_each_set_bit(sid, stream_map->sidmap, stream_map->dart->num_streams) {  in apple_dart_device_group()
851 				stream_map->dart->sid2group[sid];  in apple_dart_device_group()
854 				res = ERR_PTR(-EINVAL);  in apple_dart_device_group()
874 	res = ERR_PTR(-ENOMEM);  in apple_dart_device_group()
884 			dev_err(dev, "Failed to merge DART IOMMU grups.\n");  in apple_dart_device_group()
902 		for_each_set_bit(sid, stream_map->sidmap, stream_map->dart->num_streams)  in apple_dart_device_group()
903 			stream_map->dart->sid2group[sid] = group;  in apple_dart_device_group()
916 	if (cfg->stream_maps[0].dart->force_bypass)  in apple_dart_def_domain_type()
918 	if (!cfg->stream_maps[0].dart->supports_bypass)  in apple_dart_def_domain_type()
943 		list_add_tail(&region->list, head);  in apple_dart_get_resv_regions()
957 	.pgsize_bitmap = -1UL, /* Restricted during dart probe */
973 	struct apple_dart *dart = dev;  in apple_dart_t8020_irq()  local
975 	u32 error = readl(dart->regs + DART_T8020_ERROR);  in apple_dart_t8020_irq()
977 	u32 addr_lo = readl(dart->regs + DART_T8020_ERROR_ADDR_LO);  in apple_dart_t8020_irq()
978 	u32 addr_hi = readl(dart->regs + DART_T8020_ERROR_ADDR_HI);  in apple_dart_t8020_irq()
1000 		dart->dev,  in apple_dart_t8020_irq()
1004 	writel(error, dart->regs + DART_T8020_ERROR);  in apple_dart_t8020_irq()
1010 	struct apple_dart *dart = dev;  in apple_dart_t8110_irq()  local
1012 	u32 error = readl(dart->regs + DART_T8110_ERROR);  in apple_dart_t8110_irq()
1014 	u32 addr_lo = readl(dart->regs + DART_T8110_ERROR_ADDR_LO);  in apple_dart_t8110_irq()
1015 	u32 addr_hi = readl(dart->regs + DART_T8110_ERROR_ADDR_HI);  in apple_dart_t8110_irq()
1039 		dart->dev,  in apple_dart_t8110_irq()
1043 	writel(error, dart->regs + DART_T8110_ERROR);  in apple_dart_t8110_irq()
1052 	struct apple_dart *dart;  in apple_dart_probe()  local
1053 	struct device *dev = &pdev->dev;  in apple_dart_probe()
1055 	dart = devm_kzalloc(dev, sizeof(*dart), GFP_KERNEL);  in apple_dart_probe()
1056 	if (!dart)  in apple_dart_probe()
1057 		return -ENOMEM;  in apple_dart_probe()
1059 	dart->dev = dev;  in apple_dart_probe()
1060 	dart->hw = of_device_get_match_data(dev);  in apple_dart_probe()
1061 	spin_lock_init(&dart->lock);  in apple_dart_probe()
1063 	dart->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in apple_dart_probe()
1064 	if (IS_ERR(dart->regs))  in apple_dart_probe()
1065 		return PTR_ERR(dart->regs);  in apple_dart_probe()
1069 		return -EINVAL;  in apple_dart_probe()
1072 	dart->irq = platform_get_irq(pdev, 0);  in apple_dart_probe()
1073 	if (dart->irq < 0)  in apple_dart_probe()
1074 		return -ENODEV;  in apple_dart_probe()
1076 	ret = devm_clk_bulk_get_all(dev, &dart->clks);  in apple_dart_probe()
1079 	dart->num_clks = ret;  in apple_dart_probe()
1081 	ret = clk_bulk_prepare_enable(dart->num_clks, dart->clks);  in apple_dart_probe()
1085 	dart_params[0] = readl(dart->regs + DART_PARAMS1);  in apple_dart_probe()
1086 	dart_params[1] = readl(dart->regs + DART_PARAMS2);  in apple_dart_probe()
1087 	dart->pgsize = 1 << FIELD_GET(DART_PARAMS1_PAGE_SHIFT, dart_params[0]);  in apple_dart_probe()
1088 	dart->supports_bypass = dart_params[1] & DART_PARAMS2_BYPASS_SUPPORT;  in apple_dart_probe()
1090 	switch (dart->hw->type) {  in apple_dart_probe()
1093 		dart->ias = 32;  in apple_dart_probe()
1094 		dart->oas = dart->hw->oas;  in apple_dart_probe()
1095 		dart->num_streams = dart->hw->max_sid_count;  in apple_dart_probe()
1099 		dart_params[2] = readl(dart->regs + DART_T8110_PARAMS3);  in apple_dart_probe()
1100 		dart_params[3] = readl(dart->regs + DART_T8110_PARAMS4);  in apple_dart_probe()
1101 		dart->ias = FIELD_GET(DART_T8110_PARAMS3_VA_WIDTH, dart_params[2]);  in apple_dart_probe()
1102 		dart->oas = FIELD_GET(DART_T8110_PARAMS3_PA_WIDTH, dart_params[2]);  in apple_dart_probe()
1103 		dart->num_streams = FIELD_GET(DART_T8110_PARAMS4_NUM_SIDS, dart_params[3]);  in apple_dart_probe()
1107 	if (dart->num_streams > DART_MAX_STREAMS) {  in apple_dart_probe()
1108 		dev_err(&pdev->dev, "Too many streams (%d > %d)\n",  in apple_dart_probe()
1109 			dart->num_streams, DART_MAX_STREAMS);  in apple_dart_probe()
1110 		ret = -EINVAL;  in apple_dart_probe()
1114 	dart->force_bypass = dart->pgsize > PAGE_SIZE;  in apple_dart_probe()
1116 	ret = apple_dart_hw_reset(dart);  in apple_dart_probe()
1120 	ret = request_irq(dart->irq, dart->hw->irq_handler, IRQF_SHARED,  in apple_dart_probe()
1121 			  "apple-dart fault handler", dart);  in apple_dart_probe()
1125 	platform_set_drvdata(pdev, dart);  in apple_dart_probe()
1127 	ret = iommu_device_sysfs_add(&dart->iommu, dev, NULL, "apple-dart.%s",  in apple_dart_probe()
1128 				     dev_name(&pdev->dev));  in apple_dart_probe()
1132 	ret = iommu_device_register(&dart->iommu, &apple_dart_iommu_ops, dev);  in apple_dart_probe()
1137 		&pdev->dev,  in apple_dart_probe()
1138 		"DART [pagesize %x, %d streams, bypass support: %d, bypass forced: %d] initialized\n",  in apple_dart_probe()
1139 		dart->pgsize, dart->num_streams, dart->supports_bypass, dart->force_bypass);  in apple_dart_probe()
1143 	iommu_device_sysfs_remove(&dart->iommu);  in apple_dart_probe()
1145 	free_irq(dart->irq, dart);  in apple_dart_probe()
1147 	clk_bulk_disable_unprepare(dart->num_clks, dart->clks);  in apple_dart_probe()
1154 	struct apple_dart *dart = platform_get_drvdata(pdev);  in apple_dart_remove()  local
1156 	apple_dart_hw_reset(dart);  in apple_dart_remove()
1157 	free_irq(dart->irq, dart);  in apple_dart_remove()
1159 	iommu_device_unregister(&dart->iommu);  in apple_dart_remove()
1160 	iommu_device_sysfs_remove(&dart->iommu);  in apple_dart_remove()
1162 	clk_bulk_disable_unprepare(dart->num_clks, dart->clks);  in apple_dart_remove()
1243 	struct apple_dart *dart = dev_get_drvdata(dev);  in apple_dart_suspend()  local
1246 	for (sid = 0; sid < dart->num_streams; sid++) {  in apple_dart_suspend()
1247 		dart->save_tcr[sid] = readl_relaxed(dart->regs + DART_TCR(dart, sid));  in apple_dart_suspend()
1248 		for (idx = 0; idx < dart->hw->ttbr_count; idx++)  in apple_dart_suspend()
1249 			dart->save_ttbr[sid][idx] =  in apple_dart_suspend()
1250 				readl(dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_suspend()
1258 	struct apple_dart *dart = dev_get_drvdata(dev);  in apple_dart_resume()  local
1262 	ret = apple_dart_hw_reset(dart);  in apple_dart_resume()
1264 		dev_err(dev, "Failed to reset DART on resume\n");  in apple_dart_resume()
1268 	for (sid = 0; sid < dart->num_streams; sid++) {  in apple_dart_resume()
1269 		for (idx = 0; idx < dart->hw->ttbr_count; idx++)  in apple_dart_resume()
1270 			writel(dart->save_ttbr[sid][idx],  in apple_dart_resume()
1271 			       dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_resume()
1272 		writel(dart->save_tcr[sid], dart->regs + DART_TCR(dart, sid));  in apple_dart_resume()
1281 	{ .compatible = "apple,t8103-dart", .data = &apple_dart_hw_t8103 },
1282 	{ .compatible = "apple,t8110-dart", .data = &apple_dart_hw_t8110 },
1283 	{ .compatible = "apple,t6000-dart", .data = &apple_dart_hw_t6000 },
1290 		.name			= "apple-dart",
1301 MODULE_DESCRIPTION("IOMMU API for Apple's DART");