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"
145 #define DART_TCR(dart, sid) ((dart)->hw->tcr + ((sid) << 2))  argument
147 #define DART_TTBR(dart, sid, idx) ((dart)->hw->ttbr + \  argument
148 				   (((dart)->hw->ttbr_count * (sid)) << 2) + \
189  * Private structure associated with each DART device.
192  * @hw: SoC-specific hardware data
195  * @clks: clocks associated with this DART
197  * @lock: lock for hardware operations involving this dart
198  * @pgsize: pagesize supported by this DART
199  * @supports_bypass: indicates if this DART supports bypass mode
237  * and never changed again afterwards. Devices with different dart pointers
240  * @dart dart pointer
244 	struct apple_dart *dart;  member
248 	struct apple_dart *dart;  member
253  * This structure is attached to each iommu domain handled by a DART.
255  * @pgtbl_ops: pagetable ops allocated by io-pgtable
280 	/* Intersection of DART capabilitles */
295 	for (i = 0, stream_map = &(base)->stream_maps[0];                      \
296 	     i < MAX_DARTS_PER_DEVICE && stream_map->dart;                     \
297 	     stream_map = &(base)->stream_maps[++i])
310 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_enable_translation()  local
313 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_enable_translation()
314 		writel(dart->hw->tcr_enabled, dart->regs + DART_TCR(dart, sid));  in apple_dart_hw_enable_translation()
319 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_disable_dma()  local
322 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_disable_dma()
323 		writel(dart->hw->tcr_disabled, dart->regs + DART_TCR(dart, sid));  in apple_dart_hw_disable_dma()
329 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_enable_bypass()  local
332 	WARN_ON(!stream_map->dart->supports_bypass);  in apple_dart_hw_enable_bypass()
333 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_enable_bypass()
334 		writel(dart->hw->tcr_bypass,  in apple_dart_hw_enable_bypass()
335 		       dart->regs + DART_TCR(dart, sid));  in apple_dart_hw_enable_bypass()
341 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_set_ttbr()  local
344 	WARN_ON(paddr & ((1 << dart->hw->ttbr_shift) - 1));  in apple_dart_hw_set_ttbr()
345 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_set_ttbr()
346 		writel(dart->hw->ttbr_valid |  in apple_dart_hw_set_ttbr()
347 		       (paddr >> dart->hw->ttbr_shift) << dart->hw->ttbr_addr_field_shift,  in apple_dart_hw_set_ttbr()
348 		       dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_hw_set_ttbr()
354 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_clear_ttbr()  local
357 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_clear_ttbr()
358 		writel(0, dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_hw_clear_ttbr()
366 	for (i = 0; i < stream_map->dart->hw->ttbr_count; ++i)  in apple_dart_hw_clear_all_ttbrs()
378 	spin_lock_irqsave(&stream_map->dart->lock, flags);  in apple_dart_t8020_hw_stream_command()
380 	for (i = 0; i < BITS_TO_U32(stream_map->dart->num_streams); i++)  in apple_dart_t8020_hw_stream_command()
381 		writel(stream_map->sidmap[i],  in apple_dart_t8020_hw_stream_command()
382 		       stream_map->dart->regs + DART_T8020_STREAM_SELECT + 4 * i);  in apple_dart_t8020_hw_stream_command()
383 	writel(command, stream_map->dart->regs + DART_T8020_STREAM_COMMAND);  in apple_dart_t8020_hw_stream_command()
386 		stream_map->dart->regs + DART_T8020_STREAM_COMMAND, command_reg,  in apple_dart_t8020_hw_stream_command()
390 	spin_unlock_irqrestore(&stream_map->dart->lock, flags);  in apple_dart_t8020_hw_stream_command()
393 		dev_err(stream_map->dart->dev,  in apple_dart_t8020_hw_stream_command()
395 			command, stream_map->sidmap[0]);  in apple_dart_t8020_hw_stream_command()
406 	struct apple_dart *dart = stream_map->dart;  in apple_dart_t8110_hw_tlb_command()  local
411 	spin_lock_irqsave(&dart->lock, flags);  in apple_dart_t8110_hw_tlb_command()
413 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams) {  in apple_dart_t8110_hw_tlb_command()
416 		writel(val, dart->regs + DART_T8110_TLB_CMD);  in apple_dart_t8110_hw_tlb_command()
419 			dart->regs + DART_T8110_TLB_CMD, val,  in apple_dart_t8110_hw_tlb_command()
428 	spin_unlock_irqrestore(&dart->lock, flags);  in apple_dart_t8110_hw_tlb_command()
431 		dev_err(stream_map->dart->dev,  in apple_dart_t8110_hw_tlb_command()
454 static int apple_dart_hw_reset(struct apple_dart *dart)  in apple_dart_hw_reset()  argument
460 	config = readl(dart->regs + dart->hw->lock);  in apple_dart_hw_reset()
461 	if (config & dart->hw->lock_bit) {  in apple_dart_hw_reset()
462 		dev_err(dart->dev, "DART is locked down until reboot: %08x\n",  in apple_dart_hw_reset()
464 		return -EINVAL;  in apple_dart_hw_reset()
467 	stream_map.dart = dart;  in apple_dart_hw_reset()
469 	bitmap_set(stream_map.sidmap, 0, dart->num_streams);  in apple_dart_hw_reset()
474 	for (i = 0; i < BITS_TO_U32(dart->num_streams); i++)  in apple_dart_hw_reset()
475 		writel(U32_MAX, dart->regs + dart->hw->enable_streams + 4 * i);  in apple_dart_hw_reset()
478 	writel(readl(dart->regs + dart->hw->error), dart->regs + dart->hw->error);  in apple_dart_hw_reset()
480 	if (dart->hw->type == DART_T8110)  in apple_dart_hw_reset()
481 		writel(0,  dart->regs + DART_T8110_ERROR_MASK);  in apple_dart_hw_reset()
483 	return dart->hw->invalidate_tlb(&stream_map);  in apple_dart_hw_reset()
493 		stream_map.dart = domain_stream_map->dart;  in apple_dart_domain_flush_tlb()
495 		for (j = 0; j < BITS_TO_LONGS(stream_map.dart->num_streams); j++)  in apple_dart_domain_flush_tlb()
496 			stream_map.sidmap[j] = atomic_long_read(&domain_stream_map->sidmap[j]);  in apple_dart_domain_flush_tlb()
498 		stream_map.dart->hw->invalidate_tlb(&stream_map);  in apple_dart_domain_flush_tlb()
524 	struct io_pgtable_ops *ops = dart_domain->pgtbl_ops;  in apple_dart_iova_to_phys()
529 	return ops->iova_to_phys(ops, iova);  in apple_dart_iova_to_phys()
538 	struct io_pgtable_ops *ops = dart_domain->pgtbl_ops;  in apple_dart_map_pages()
541 		return -ENODEV;  in apple_dart_map_pages()
543 	return ops->map_pages(ops, iova, paddr, pgsize, pgcount, prot, gfp,  in apple_dart_map_pages()
553 	struct io_pgtable_ops *ops = dart_domain->pgtbl_ops;  in apple_dart_unmap_pages()
555 	return ops->unmap_pages(ops, iova, pgsize, pgcount, gather);  in apple_dart_unmap_pages()
564 		&io_pgtable_ops_to_pgtable(domain->pgtbl_ops)->cfg;  in apple_dart_setup_translation()
566 	for (i = 0; i < pgtbl_cfg->apple_dart_cfg.n_ttbrs; ++i)  in apple_dart_setup_translation()
568 				       pgtbl_cfg->apple_dart_cfg.ttbr[i]);  in apple_dart_setup_translation()
569 	for (; i < stream_map->dart->hw->ttbr_count; ++i)  in apple_dart_setup_translation()
573 	stream_map->dart->hw->invalidate_tlb(stream_map);  in apple_dart_setup_translation()
579 	struct apple_dart *dart = cfg->stream_maps[0].dart;  in apple_dart_finalize_domain()  local
584 	if (dart->pgsize > PAGE_SIZE)  in apple_dart_finalize_domain()
585 		return -EINVAL;  in apple_dart_finalize_domain()
587 	mutex_lock(&dart_domain->init_lock);  in apple_dart_finalize_domain()
589 	if (dart_domain->finalized)  in apple_dart_finalize_domain()
593 		dart_domain->stream_maps[i].dart = cfg->stream_maps[i].dart;  in apple_dart_finalize_domain()
594 		for (j = 0; j < BITS_TO_LONGS(dart->num_streams); j++)  in apple_dart_finalize_domain()
595 			atomic_long_set(&dart_domain->stream_maps[i].sidmap[j],  in apple_dart_finalize_domain()
596 					cfg->stream_maps[i].sidmap[j]);  in apple_dart_finalize_domain()
600 		.pgsize_bitmap = dart->pgsize,  in apple_dart_finalize_domain()
601 		.ias = dart->ias,  in apple_dart_finalize_domain()
602 		.oas = dart->oas,  in apple_dart_finalize_domain()
604 		.iommu_dev = dart->dev,  in apple_dart_finalize_domain()
607 	dart_domain->pgtbl_ops = alloc_io_pgtable_ops(dart->hw->fmt, &pgtbl_cfg,  in apple_dart_finalize_domain()
608 						      &dart_domain->domain);  in apple_dart_finalize_domain()
609 	if (!dart_domain->pgtbl_ops) {  in apple_dart_finalize_domain()
610 		ret = -ENOMEM;  in apple_dart_finalize_domain()
614 	dart_domain->domain.pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;  in apple_dart_finalize_domain()
615 	dart_domain->domain.geometry.aperture_start = 0;  in apple_dart_finalize_domain()
616 	dart_domain->domain.geometry.aperture_end =  in apple_dart_finalize_domain()
617 		(dma_addr_t)DMA_BIT_MASK(dart->ias);  in apple_dart_finalize_domain()
618 	dart_domain->domain.geometry.force_aperture = true;  in apple_dart_finalize_domain()
620 	dart_domain->finalized = true;  in apple_dart_finalize_domain()
623 	mutex_unlock(&dart_domain->init_lock);  in apple_dart_finalize_domain()
635 		if (domain_maps[i].dart != master_maps[i].dart)  in apple_dart_mod_streams()
636 			return -EINVAL;  in apple_dart_mod_streams()
640 		if (!domain_maps[i].dart)  in apple_dart_mod_streams()
642 		for (j = 0; j < BITS_TO_LONGS(domain_maps[i].dart->num_streams); j++) {  in apple_dart_mod_streams()
658 	return apple_dart_mod_streams(domain->stream_maps, cfg->stream_maps,  in apple_dart_domain_add_streams()
690 	if (!cfg->supports_bypass)  in apple_dart_attach_dev_identity()
691 		return -EINVAL;  in apple_dart_attach_dev_identity()
735 		return ERR_PTR(-ENODEV);  in apple_dart_probe_device()
739 			dev, stream_map->dart->dev,  in apple_dart_probe_device()
742 	return &cfg->stream_maps[0].dart->iommu;  in apple_dart_probe_device()
760 	mutex_init(&dart_domain->init_lock);  in apple_dart_domain_alloc_paging()
772 	return &dart_domain->domain;  in apple_dart_domain_alloc_paging()
779 	if (dart_domain->pgtbl_ops)  in apple_dart_domain_free()
780 		free_io_pgtable_ops(dart_domain->pgtbl_ops);  in apple_dart_domain_free()
789 	struct platform_device *iommu_pdev = of_find_device_by_node(args->np);  in apple_dart_of_xlate()
790 	struct apple_dart *dart = platform_get_drvdata(iommu_pdev);  in apple_dart_of_xlate()  local
794 	if (args->args_count != 1)  in apple_dart_of_xlate()
795 		return -EINVAL;  in apple_dart_of_xlate()
796 	sid = args->args[0];  in apple_dart_of_xlate()
801 			return -ENOMEM;  in apple_dart_of_xlate()
802 		/* Will be ANDed with DART capabilities */  in apple_dart_of_xlate()
803 		cfg->supports_bypass = true;  in apple_dart_of_xlate()
807 	cfg_dart = cfg->stream_maps[0].dart;  in apple_dart_of_xlate()
809 		if (cfg_dart->pgsize != dart->pgsize)  in apple_dart_of_xlate()
810 			return -EINVAL;  in apple_dart_of_xlate()
813 	cfg->supports_bypass &= dart->supports_bypass;  in apple_dart_of_xlate()
816 		if (cfg->stream_maps[i].dart == dart) {  in apple_dart_of_xlate()
817 			set_bit(sid, cfg->stream_maps[i].sidmap);  in apple_dart_of_xlate()
822 		if (!cfg->stream_maps[i].dart) {  in apple_dart_of_xlate()
823 			cfg->stream_maps[i].dart = dart;  in apple_dart_of_xlate()
824 			set_bit(sid, cfg->stream_maps[i].sidmap);  in apple_dart_of_xlate()
829 	return -EINVAL;  in apple_dart_of_xlate()
843 		for_each_set_bit(sid, stream_map->sidmap, stream_map->dart->num_streams)  in apple_dart_release_group()
844 			stream_map->dart->sid2group[sid] = NULL;  in apple_dart_release_group()
857 	 * just assume that both src and dst only have the same single DART.  in apple_dart_merge_master_cfg()
859 	if (src->stream_maps[1].dart)  in apple_dart_merge_master_cfg()
860 		return -EINVAL;  in apple_dart_merge_master_cfg()
861 	if (dst->stream_maps[1].dart)  in apple_dart_merge_master_cfg()
862 		return -EINVAL;  in apple_dart_merge_master_cfg()
863 	if (src->stream_maps[0].dart != dst->stream_maps[0].dart)  in apple_dart_merge_master_cfg()
864 		return -EINVAL;  in apple_dart_merge_master_cfg()
866 	bitmap_or(dst->stream_maps[0].sidmap,  in apple_dart_merge_master_cfg()
867 		  dst->stream_maps[0].sidmap,  in apple_dart_merge_master_cfg()
868 		  src->stream_maps[0].sidmap,  in apple_dart_merge_master_cfg()
869 		  dst->stream_maps[0].dart->num_streams);  in apple_dart_merge_master_cfg()
880 	struct iommu_group *res = ERR_PTR(-EINVAL);  in apple_dart_device_group()
885 		for_each_set_bit(sid, stream_map->sidmap, stream_map->dart->num_streams) {  in apple_dart_device_group()
887 				stream_map->dart->sid2group[sid];  in apple_dart_device_group()
890 				res = ERR_PTR(-EINVAL);  in apple_dart_device_group()
910 	res = ERR_PTR(-ENOMEM);  in apple_dart_device_group()
920 			dev_err(dev, "Failed to merge DART IOMMU groups.\n");  in apple_dart_device_group()
938 		for_each_set_bit(sid, stream_map->sidmap, stream_map->dart->num_streams)  in apple_dart_device_group()
939 			stream_map->dart->sid2group[sid] = group;  in apple_dart_device_group()
952 	if (cfg->stream_maps[0].dart->pgsize > PAGE_SIZE)  in apple_dart_def_domain_type()
954 	if (!cfg->supports_bypass)  in apple_dart_def_domain_type()
979 		list_add_tail(&region->list, head);  in apple_dart_get_resv_regions()
995 	.pgsize_bitmap = -1UL, /* Restricted during dart probe */
1011 	struct apple_dart *dart = dev;  in apple_dart_t8020_irq()  local
1013 	u32 error = readl(dart->regs + DART_T8020_ERROR);  in apple_dart_t8020_irq()
1015 	u32 addr_lo = readl(dart->regs + DART_T8020_ERROR_ADDR_LO);  in apple_dart_t8020_irq()
1016 	u32 addr_hi = readl(dart->regs + DART_T8020_ERROR_ADDR_HI);  in apple_dart_t8020_irq()
1038 		dart->dev,  in apple_dart_t8020_irq()
1042 	writel(error, dart->regs + DART_T8020_ERROR);  in apple_dart_t8020_irq()
1048 	struct apple_dart *dart = dev;  in apple_dart_t8110_irq()  local
1050 	u32 error = readl(dart->regs + DART_T8110_ERROR);  in apple_dart_t8110_irq()
1052 	u32 addr_lo = readl(dart->regs + DART_T8110_ERROR_ADDR_LO);  in apple_dart_t8110_irq()
1053 	u32 addr_hi = readl(dart->regs + DART_T8110_ERROR_ADDR_HI);  in apple_dart_t8110_irq()
1077 		dart->dev,  in apple_dart_t8110_irq()
1081 	writel(error, dart->regs + DART_T8110_ERROR);  in apple_dart_t8110_irq()
1090 	struct apple_dart *dart;  in apple_dart_probe()  local
1091 	struct device *dev = &pdev->dev;  in apple_dart_probe()
1093 	dart = devm_kzalloc(dev, sizeof(*dart), GFP_KERNEL);  in apple_dart_probe()
1094 	if (!dart)  in apple_dart_probe()
1095 		return -ENOMEM;  in apple_dart_probe()
1097 	dart->dev = dev;  in apple_dart_probe()
1098 	dart->hw = of_device_get_match_data(dev);  in apple_dart_probe()
1099 	spin_lock_init(&dart->lock);  in apple_dart_probe()
1101 	dart->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in apple_dart_probe()
1102 	if (IS_ERR(dart->regs))  in apple_dart_probe()
1103 		return PTR_ERR(dart->regs);  in apple_dart_probe()
1107 		return -EINVAL;  in apple_dart_probe()
1110 	dart->irq = platform_get_irq(pdev, 0);  in apple_dart_probe()
1111 	if (dart->irq < 0)  in apple_dart_probe()
1112 		return -ENODEV;  in apple_dart_probe()
1114 	ret = devm_clk_bulk_get_all(dev, &dart->clks);  in apple_dart_probe()
1117 	dart->num_clks = ret;  in apple_dart_probe()
1119 	ret = clk_bulk_prepare_enable(dart->num_clks, dart->clks);  in apple_dart_probe()
1123 	dart_params[0] = readl(dart->regs + DART_PARAMS1);  in apple_dart_probe()
1124 	dart_params[1] = readl(dart->regs + DART_PARAMS2);  in apple_dart_probe()
1125 	dart->pgsize = 1 << FIELD_GET(DART_PARAMS1_PAGE_SHIFT, dart_params[0]);  in apple_dart_probe()
1126 	dart->supports_bypass = dart_params[1] & DART_PARAMS2_BYPASS_SUPPORT;  in apple_dart_probe()
1128 	switch (dart->hw->type) {  in apple_dart_probe()
1131 		dart->ias = 32;  in apple_dart_probe()
1132 		dart->oas = dart->hw->oas;  in apple_dart_probe()
1133 		dart->num_streams = dart->hw->max_sid_count;  in apple_dart_probe()
1137 		dart_params[2] = readl(dart->regs + DART_T8110_PARAMS3);  in apple_dart_probe()
1138 		dart_params[3] = readl(dart->regs + DART_T8110_PARAMS4);  in apple_dart_probe()
1139 		dart->ias = FIELD_GET(DART_T8110_PARAMS3_VA_WIDTH, dart_params[2]);  in apple_dart_probe()
1140 		dart->oas = FIELD_GET(DART_T8110_PARAMS3_PA_WIDTH, dart_params[2]);  in apple_dart_probe()
1141 		dart->num_streams = FIELD_GET(DART_T8110_PARAMS4_NUM_SIDS, dart_params[3]);  in apple_dart_probe()
1145 	if (dart->num_streams > DART_MAX_STREAMS) {  in apple_dart_probe()
1146 		dev_err(&pdev->dev, "Too many streams (%d > %d)\n",  in apple_dart_probe()
1147 			dart->num_streams, DART_MAX_STREAMS);  in apple_dart_probe()
1148 		ret = -EINVAL;  in apple_dart_probe()
1152 	ret = apple_dart_hw_reset(dart);  in apple_dart_probe()
1156 	ret = request_irq(dart->irq, dart->hw->irq_handler, IRQF_SHARED,  in apple_dart_probe()
1157 			  "apple-dart fault handler", dart);  in apple_dart_probe()
1161 	platform_set_drvdata(pdev, dart);  in apple_dart_probe()
1163 	ret = iommu_device_sysfs_add(&dart->iommu, dev, NULL, "apple-dart.%s",  in apple_dart_probe()
1164 				     dev_name(&pdev->dev));  in apple_dart_probe()
1168 	ret = iommu_device_register(&dart->iommu, &apple_dart_iommu_ops, dev);  in apple_dart_probe()
1173 		&pdev->dev,  in apple_dart_probe()
1174 		"DART [pagesize %x, %d streams, bypass support: %d, bypass forced: %d] initialized\n",  in apple_dart_probe()
1175 		dart->pgsize, dart->num_streams, dart->supports_bypass,  in apple_dart_probe()
1176 		dart->pgsize > PAGE_SIZE);  in apple_dart_probe()
1180 	iommu_device_sysfs_remove(&dart->iommu);  in apple_dart_probe()
1182 	free_irq(dart->irq, dart);  in apple_dart_probe()
1184 	clk_bulk_disable_unprepare(dart->num_clks, dart->clks);  in apple_dart_probe()
1191 	struct apple_dart *dart = platform_get_drvdata(pdev);  in apple_dart_remove()  local
1193 	apple_dart_hw_reset(dart);  in apple_dart_remove()
1194 	free_irq(dart->irq, dart);  in apple_dart_remove()
1196 	iommu_device_unregister(&dart->iommu);  in apple_dart_remove()
1197 	iommu_device_sysfs_remove(&dart->iommu);  in apple_dart_remove()
1199 	clk_bulk_disable_unprepare(dart->num_clks, dart->clks);  in apple_dart_remove()
1307 	struct apple_dart *dart = dev_get_drvdata(dev);  in apple_dart_suspend()  local
1310 	for (sid = 0; sid < dart->num_streams; sid++) {  in apple_dart_suspend()
1311 		dart->save_tcr[sid] = readl(dart->regs + DART_TCR(dart, sid));  in apple_dart_suspend()
1312 		for (idx = 0; idx < dart->hw->ttbr_count; idx++)  in apple_dart_suspend()
1313 			dart->save_ttbr[sid][idx] =  in apple_dart_suspend()
1314 				readl(dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_suspend()
1322 	struct apple_dart *dart = dev_get_drvdata(dev);  in apple_dart_resume()  local
1326 	ret = apple_dart_hw_reset(dart);  in apple_dart_resume()
1328 		dev_err(dev, "Failed to reset DART on resume\n");  in apple_dart_resume()
1332 	for (sid = 0; sid < dart->num_streams; sid++) {  in apple_dart_resume()
1333 		for (idx = 0; idx < dart->hw->ttbr_count; idx++)  in apple_dart_resume()
1334 			writel(dart->save_ttbr[sid][idx],  in apple_dart_resume()
1335 			       dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_resume()
1336 		writel(dart->save_tcr[sid], dart->regs + DART_TCR(dart, sid));  in apple_dart_resume()
1345 	{ .compatible = "apple,t8103-dart", .data = &apple_dart_hw_t8103 },
1346 	{ .compatible = "apple,t8103-usb4-dart", .data = &apple_dart_hw_t8103_usb4 },
1347 	{ .compatible = "apple,t8110-dart", .data = &apple_dart_hw_t8110 },
1348 	{ .compatible = "apple,t6000-dart", .data = &apple_dart_hw_t6000 },
1355 		.name			= "apple-dart",
1366 MODULE_DESCRIPTION("IOMMU API for Apple's DART");