3  * Apple DART (Device Address Resolution Table) IOMMU driver
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.
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.
293 	     i < MAX_DARTS_PER_DEVICE && stream_map->dart;                     \
307 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_enable_translation()  local
310 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_enable_translation()
311 		writel(dart->hw->tcr_enabled, dart->regs + DART_TCR(dart, sid));  in apple_dart_hw_enable_translation()
316 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_disable_dma()  local
319 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_disable_dma()
320 		writel(dart->hw->tcr_disabled, dart->regs + DART_TCR(dart, sid));  in apple_dart_hw_disable_dma()
326 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_enable_bypass()  local
329 	WARN_ON(!stream_map->dart->supports_bypass);  in apple_dart_hw_enable_bypass()
330 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_enable_bypass()
331 		writel(dart->hw->tcr_bypass,  in apple_dart_hw_enable_bypass()
332 		       dart->regs + DART_TCR(dart, sid));  in apple_dart_hw_enable_bypass()
338 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_set_ttbr()  local
341 	WARN_ON(paddr & ((1 << dart->hw->ttbr_shift) - 1));  in apple_dart_hw_set_ttbr()
342 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_set_ttbr()
343 		writel(dart->hw->ttbr_valid |  in apple_dart_hw_set_ttbr()
344 		       (paddr >> dart->hw->ttbr_shift) << dart->hw->ttbr_addr_field_shift,  in apple_dart_hw_set_ttbr()
345 		       dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_hw_set_ttbr()
351 	struct apple_dart *dart = stream_map->dart;  in apple_dart_hw_clear_ttbr()  local
354 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams)  in apple_dart_hw_clear_ttbr()
355 		writel(0, dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_hw_clear_ttbr()
363 	for (i = 0; i < stream_map->dart->hw->ttbr_count; ++i)  in apple_dart_hw_clear_all_ttbrs()
375 	spin_lock_irqsave(&stream_map->dart->lock, flags);  in apple_dart_t8020_hw_stream_command()
377 	for (i = 0; i < BITS_TO_U32(stream_map->dart->num_streams); i++)  in apple_dart_t8020_hw_stream_command()
379 		       stream_map->dart->regs + DART_T8020_STREAM_SELECT + 4 * i);  in apple_dart_t8020_hw_stream_command()
380 	writel(command, stream_map->dart->regs + DART_T8020_STREAM_COMMAND);  in apple_dart_t8020_hw_stream_command()
383 		stream_map->dart->regs + DART_T8020_STREAM_COMMAND, command_reg,  in apple_dart_t8020_hw_stream_command()
387 	spin_unlock_irqrestore(&stream_map->dart->lock, flags);  in apple_dart_t8020_hw_stream_command()
390 		dev_err(stream_map->dart->dev,  in apple_dart_t8020_hw_stream_command()
403 	struct apple_dart *dart = stream_map->dart;  in apple_dart_t8110_hw_tlb_command()  local
408 	spin_lock_irqsave(&dart->lock, flags);  in apple_dart_t8110_hw_tlb_command()
410 	for_each_set_bit(sid, stream_map->sidmap, dart->num_streams) {  in apple_dart_t8110_hw_tlb_command()
413 		writel(val, dart->regs + DART_T8110_TLB_CMD);  in apple_dart_t8110_hw_tlb_command()
416 			dart->regs + DART_T8110_TLB_CMD, val,  in apple_dart_t8110_hw_tlb_command()
425 	spin_unlock_irqrestore(&dart->lock, flags);  in apple_dart_t8110_hw_tlb_command()
428 		dev_err(stream_map->dart->dev,  in apple_dart_t8110_hw_tlb_command()
451 static int apple_dart_hw_reset(struct apple_dart *dart)  in apple_dart_hw_reset()  argument
457 	config = readl(dart->regs + dart->hw->lock);  in apple_dart_hw_reset()
458 	if (config & dart->hw->lock_bit) {  in apple_dart_hw_reset()
459 		dev_err(dart->dev, "DART is locked down until reboot: %08x\n",  in apple_dart_hw_reset()
464 	stream_map.dart = dart;  in apple_dart_hw_reset()
466 	bitmap_set(stream_map.sidmap, 0, dart->num_streams);  in apple_dart_hw_reset()
471 	for (i = 0; i < BITS_TO_U32(dart->num_streams); i++)  in apple_dart_hw_reset()
472 		writel(U32_MAX, dart->regs + dart->hw->enable_streams + 4 * i);  in apple_dart_hw_reset()
475 	writel(readl(dart->regs + dart->hw->error), dart->regs + dart->hw->error);  in apple_dart_hw_reset()
477 	if (dart->hw->type == DART_T8110)  in apple_dart_hw_reset()
478 		writel(0,  dart->regs + DART_T8110_ERROR_MASK);  in apple_dart_hw_reset()
480 	return dart->hw->invalidate_tlb(&stream_map);  in apple_dart_hw_reset()
490 		stream_map.dart = domain_stream_map->dart;  in apple_dart_domain_flush_tlb()
492 		for (j = 0; j < BITS_TO_LONGS(stream_map.dart->num_streams); j++)  in apple_dart_domain_flush_tlb()
495 		stream_map.dart->hw->invalidate_tlb(&stream_map);  in apple_dart_domain_flush_tlb()
566 	for (; i < stream_map->dart->hw->ttbr_count; ++i)  in apple_dart_setup_translation()
570 	stream_map->dart->hw->invalidate_tlb(stream_map);  in apple_dart_setup_translation()
576 	struct apple_dart *dart = cfg->stream_maps[0].dart;  in apple_dart_finalize_domain()  local
581 	if (dart->pgsize > PAGE_SIZE)  in apple_dart_finalize_domain()
590 		dart_domain->stream_maps[i].dart = cfg->stream_maps[i].dart;  in apple_dart_finalize_domain()
591 		for (j = 0; j < BITS_TO_LONGS(dart->num_streams); j++)  in apple_dart_finalize_domain()
597 		.pgsize_bitmap = dart->pgsize,  in apple_dart_finalize_domain()
598 		.ias = dart->ias,  in apple_dart_finalize_domain()
599 		.oas = dart->oas,  in apple_dart_finalize_domain()
601 		.iommu_dev = dart->dev,  in apple_dart_finalize_domain()
604 	dart_domain->pgtbl_ops = alloc_io_pgtable_ops(dart->hw->fmt, &pgtbl_cfg,  in apple_dart_finalize_domain()
614 		(dma_addr_t)DMA_BIT_MASK(dart->ias);  in apple_dart_finalize_domain()
632 		if (domain_maps[i].dart != master_maps[i].dart)  in apple_dart_mod_streams()
637 		if (!domain_maps[i].dart)  in apple_dart_mod_streams()
639 		for (j = 0; j < BITS_TO_LONGS(domain_maps[i].dart->num_streams); j++) {  in apple_dart_mod_streams()
687 	if (!cfg->stream_maps[0].dart->supports_bypass)  in apple_dart_attach_dev_identity()
736 			dev, stream_map->dart->dev,  in apple_dart_probe_device()
739 	return &cfg->stream_maps[0].dart->iommu;  in apple_dart_probe_device()
786 	struct apple_dart *dart = platform_get_drvdata(iommu_pdev);  in apple_dart_of_xlate()  local
800 	cfg_dart = cfg->stream_maps[0].dart;  in apple_dart_of_xlate()
802 		if (cfg_dart->supports_bypass != dart->supports_bypass)  in apple_dart_of_xlate()
804 		if (cfg_dart->pgsize != dart->pgsize)  in apple_dart_of_xlate()
809 		if (cfg->stream_maps[i].dart == dart) {  in apple_dart_of_xlate()
815 		if (!cfg->stream_maps[i].dart) {  in apple_dart_of_xlate()
816 			cfg->stream_maps[i].dart = dart;  in apple_dart_of_xlate()
836 		for_each_set_bit(sid, stream_map->sidmap, stream_map->dart->num_streams)  in apple_dart_release_group()
837 			stream_map->dart->sid2group[sid] = NULL;  in apple_dart_release_group()
850 	 * just assume that both src and dst only have the same single DART.  in apple_dart_merge_master_cfg()
852 	if (src->stream_maps[1].dart)  in apple_dart_merge_master_cfg()
854 	if (dst->stream_maps[1].dart)  in apple_dart_merge_master_cfg()
856 	if (src->stream_maps[0].dart != dst->stream_maps[0].dart)  in apple_dart_merge_master_cfg()
862 		  dst->stream_maps[0].dart->num_streams);  in apple_dart_merge_master_cfg()
878 		for_each_set_bit(sid, stream_map->sidmap, stream_map->dart->num_streams) {  in apple_dart_device_group()
880 				stream_map->dart->sid2group[sid];  in apple_dart_device_group()
913 			dev_err(dev, "Failed to merge DART IOMMU groups.\n");  in apple_dart_device_group()
931 		for_each_set_bit(sid, stream_map->sidmap, stream_map->dart->num_streams)  in apple_dart_device_group()
932 			stream_map->dart->sid2group[sid] = group;  in apple_dart_device_group()
945 	if (cfg->stream_maps[0].dart->pgsize > PAGE_SIZE)  in apple_dart_def_domain_type()
947 	if (!cfg->stream_maps[0].dart->supports_bypass)  in apple_dart_def_domain_type()
988 	.pgsize_bitmap = -1UL, /* Restricted during dart probe */
1004 	struct apple_dart *dart = dev;  in apple_dart_t8020_irq()  local
1006 	u32 error = readl(dart->regs + DART_T8020_ERROR);  in apple_dart_t8020_irq()
1008 	u32 addr_lo = readl(dart->regs + DART_T8020_ERROR_ADDR_LO);  in apple_dart_t8020_irq()
1009 	u32 addr_hi = readl(dart->regs + DART_T8020_ERROR_ADDR_HI);  in apple_dart_t8020_irq()
1031 		dart->dev,  in apple_dart_t8020_irq()
1035 	writel(error, dart->regs + DART_T8020_ERROR);  in apple_dart_t8020_irq()
1041 	struct apple_dart *dart = dev;  in apple_dart_t8110_irq()  local
1043 	u32 error = readl(dart->regs + DART_T8110_ERROR);  in apple_dart_t8110_irq()
1045 	u32 addr_lo = readl(dart->regs + DART_T8110_ERROR_ADDR_LO);  in apple_dart_t8110_irq()
1046 	u32 addr_hi = readl(dart->regs + DART_T8110_ERROR_ADDR_HI);  in apple_dart_t8110_irq()
1070 		dart->dev,  in apple_dart_t8110_irq()
1074 	writel(error, dart->regs + DART_T8110_ERROR);  in apple_dart_t8110_irq()
1083 	struct apple_dart *dart;  in apple_dart_probe()  local
1086 	dart = devm_kzalloc(dev, sizeof(*dart), GFP_KERNEL);  in apple_dart_probe()
1087 	if (!dart)  in apple_dart_probe()
1090 	dart->dev = dev;  in apple_dart_probe()
1091 	dart->hw = of_device_get_match_data(dev);  in apple_dart_probe()
1092 	spin_lock_init(&dart->lock);  in apple_dart_probe()
1094 	dart->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in apple_dart_probe()
1095 	if (IS_ERR(dart->regs))  in apple_dart_probe()
1096 		return PTR_ERR(dart->regs);  in apple_dart_probe()
1103 	dart->irq = platform_get_irq(pdev, 0);  in apple_dart_probe()
1104 	if (dart->irq < 0)  in apple_dart_probe()
1107 	ret = devm_clk_bulk_get_all(dev, &dart->clks);  in apple_dart_probe()
1110 	dart->num_clks = ret;  in apple_dart_probe()
1112 	ret = clk_bulk_prepare_enable(dart->num_clks, dart->clks);  in apple_dart_probe()
1116 	dart_params[0] = readl(dart->regs + DART_PARAMS1);  in apple_dart_probe()
1117 	dart_params[1] = readl(dart->regs + DART_PARAMS2);  in apple_dart_probe()
1118 	dart->pgsize = 1 << FIELD_GET(DART_PARAMS1_PAGE_SHIFT, dart_params[0]);  in apple_dart_probe()
1119 	dart->supports_bypass = dart_params[1] & DART_PARAMS2_BYPASS_SUPPORT;  in apple_dart_probe()
1121 	switch (dart->hw->type) {  in apple_dart_probe()
1124 		dart->ias = 32;  in apple_dart_probe()
1125 		dart->oas = dart->hw->oas;  in apple_dart_probe()
1126 		dart->num_streams = dart->hw->max_sid_count;  in apple_dart_probe()
1130 		dart_params[2] = readl(dart->regs + DART_T8110_PARAMS3);  in apple_dart_probe()
1131 		dart_params[3] = readl(dart->regs + DART_T8110_PARAMS4);  in apple_dart_probe()
1132 		dart->ias = FIELD_GET(DART_T8110_PARAMS3_VA_WIDTH, dart_params[2]);  in apple_dart_probe()
1133 		dart->oas = FIELD_GET(DART_T8110_PARAMS3_PA_WIDTH, dart_params[2]);  in apple_dart_probe()
1134 		dart->num_streams = FIELD_GET(DART_T8110_PARAMS4_NUM_SIDS, dart_params[3]);  in apple_dart_probe()
1138 	if (dart->num_streams > DART_MAX_STREAMS) {  in apple_dart_probe()
1140 			dart->num_streams, DART_MAX_STREAMS);  in apple_dart_probe()
1145 	ret = apple_dart_hw_reset(dart);  in apple_dart_probe()
1149 	ret = request_irq(dart->irq, dart->hw->irq_handler, IRQF_SHARED,  in apple_dart_probe()
1150 			  "apple-dart fault handler", dart);  in apple_dart_probe()
1154 	platform_set_drvdata(pdev, dart);  in apple_dart_probe()
1156 	ret = iommu_device_sysfs_add(&dart->iommu, dev, NULL, "apple-dart.%s",  in apple_dart_probe()
1161 	ret = iommu_device_register(&dart->iommu, &apple_dart_iommu_ops, dev);  in apple_dart_probe()
1167 		"DART [pagesize %x, %d streams, bypass support: %d, bypass forced: %d] initialized\n",  in apple_dart_probe()
1168 		dart->pgsize, dart->num_streams, dart->supports_bypass,  in apple_dart_probe()
1169 		dart->pgsize > PAGE_SIZE);  in apple_dart_probe()
1173 	iommu_device_sysfs_remove(&dart->iommu);  in apple_dart_probe()
1175 	free_irq(dart->irq, dart);  in apple_dart_probe()
1177 	clk_bulk_disable_unprepare(dart->num_clks, dart->clks);  in apple_dart_probe()
1184 	struct apple_dart *dart = platform_get_drvdata(pdev);  in apple_dart_remove()  local
1186 	apple_dart_hw_reset(dart);  in apple_dart_remove()
1187 	free_irq(dart->irq, dart);  in apple_dart_remove()
1189 	iommu_device_unregister(&dart->iommu);  in apple_dart_remove()
1190 	iommu_device_sysfs_remove(&dart->iommu);  in apple_dart_remove()
1192 	clk_bulk_disable_unprepare(dart->num_clks, dart->clks);  in apple_dart_remove()
1300 	struct apple_dart *dart = dev_get_drvdata(dev);  in apple_dart_suspend()  local
1303 	for (sid = 0; sid < dart->num_streams; sid++) {  in apple_dart_suspend()
1304 		dart->save_tcr[sid] = readl(dart->regs + DART_TCR(dart, sid));  in apple_dart_suspend()
1305 		for (idx = 0; idx < dart->hw->ttbr_count; idx++)  in apple_dart_suspend()
1306 			dart->save_ttbr[sid][idx] =  in apple_dart_suspend()
1307 				readl(dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_suspend()
1315 	struct apple_dart *dart = dev_get_drvdata(dev);  in apple_dart_resume()  local
1319 	ret = apple_dart_hw_reset(dart);  in apple_dart_resume()
1321 		dev_err(dev, "Failed to reset DART on resume\n");  in apple_dart_resume()
1325 	for (sid = 0; sid < dart->num_streams; sid++) {  in apple_dart_resume()
1326 		for (idx = 0; idx < dart->hw->ttbr_count; idx++)  in apple_dart_resume()
1327 			writel(dart->save_ttbr[sid][idx],  in apple_dart_resume()
1328 			       dart->regs + DART_TTBR(dart, sid, idx));  in apple_dart_resume()
1329 		writel(dart->save_tcr[sid], dart->regs + DART_TCR(dart, sid));  in apple_dart_resume()
1338 	{ .compatible = "apple,t8103-dart", .data = &apple_dart_hw_t8103 },
1339 	{ .compatible = "apple,t8103-usb4-dart", .data = &apple_dart_hw_t8103_usb4 },
1340 	{ .compatible = "apple,t8110-dart", .data = &apple_dart_hw_t8110 },
1341 	{ .compatible = "apple,t6000-dart", .data = &apple_dart_hw_t6000 },
1348 		.name			= "apple-dart",
1359 MODULE_DESCRIPTION("IOMMU API for Apple's DART");