linux-4.4.1/do_iommu_attach() の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• linux-4.4.1/do_iommu_attach() へ行く。
• linux-4.4.1/do_iommu_attach() の差分を削除

*参照元 [#mbee36c9]
#backlinks

*説明 [#sa71bb69]
-パス: [[linux-4.4.1/arch/arm64/mm/dma-mapping.c]]

-FIXME: これは何？
--説明


**引数 [#t4948f31]
-struct device *dev
--
--[[linux-4.4.1/device]]
-const struct iommu_ops *ops
--
--[[linux-4.4.1/iommu_ops]]
-u64 dma_base
--
-u64 size
--


**返り値 [#w641b359]
-bool
--


**参考 [#t1005523]


*実装 [#ec8491c4]
 static bool do_iommu_attach(struct device *dev, const struct iommu_ops *ops,
 			   u64 dma_base, u64 size)
 {
 	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
 
-
--[[linux-4.4.1/iommu_domain]]
--[[linux-4.4.1/iommu_get_domain_for_dev()]]

 	/*
 	 * Best case: The device is either part of a group which was
 	 * already attached to a domain in a previous call, or it's
 	 * been put in a default DMA domain by the IOMMU core.
 	 */
 	if (!domain) {
 		/*
 		 * Urgh. The IOMMU core isn't going to do default domains
 		 * for non-PCI devices anyway, until it has some means of
 		 * abstracting the entirely implementation-specific
 		 * sideband data/SoC topology/unicorn dust that may or
 		 * may not differentiate upstream masters.
 		 * So until then, HORRIBLE HACKS!
 		 */
 		domain = ops->domain_alloc(IOMMU_DOMAIN_DMA);
 		if (!domain)
 			goto out_no_domain;
 
 		domain->ops = ops;
 		domain->type = IOMMU_DOMAIN_DMA | __IOMMU_DOMAIN_FAKE_DEFAULT;
 
 		if (iommu_attach_device(domain, dev))
 			goto out_put_domain;
-
--[[linux-4.4.1/iommu_attach_device()]]

 	}
 
 	if (iommu_dma_init_domain(domain, dma_base, size))
 		goto out_detach;
 
-
--[[linux-4.4.1/iommu_dma_init_domain()]]

 	dev->archdata.dma_ops = &iommu_dma_ops;
 	return true;
 
-
--[[linux-4.4.1/]]
-dev->archdata は struct dev_archdata 型
--[[linux-4.4.1/dev_archdata]]
--[[linux-4.4.1/iommu_dma_ops(global)]]

 out_detach:
 	iommu_detach_device(domain, dev);
-
--[[linux-4.4.1/iommu_detach_device()]]

 out_put_domain:
 	if (domain->type & __IOMMU_DOMAIN_FAKE_DEFAULT)
 		iommu_domain_free(domain);
-
--[[linux-4.4.1/iommu_domain_free()]]

 out_no_domain:
 	pr_warn("Failed to set up IOMMU for device %s; retaining platform DMA ops\n",
 		dev_name(dev));
 	return false;
-
--[[linux-4.4.1/pr_warn()]]
--[[linux-4.4.1/dev_name()]]

 }


*コメント [#uaad4962]