linux-4.4.1/do_iommu_attach()
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開始行:
*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 st...
u64 dma_base, u64 size)
{
struct iommu_domain *domain = iommu_get_domain_for_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 whic...
* already attached to a domain in a previous call, or ...
* been put in a default DMA domain by the IOMMU core.
*/
if (!domain) {
/*
* Urgh. The IOMMU core isn't going to do default doma...
* for non-PCI devices anyway, until it has some means...
* 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_...
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;
-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; retainin...
dev_name(dev));
return false;
-
--[[linux-4.4.1/pr_warn()]]
--[[linux-4.4.1/dev_name()]]
}
*コメント [#uaad4962]
終了行:
*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 st...
u64 dma_base, u64 size)
{
struct iommu_domain *domain = iommu_get_domain_for_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 whic...
* already attached to a domain in a previous call, or ...
* been put in a default DMA domain by the IOMMU core.
*/
if (!domain) {
/*
* Urgh. The IOMMU core isn't going to do default doma...
* for non-PCI devices anyway, until it has some means...
* 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_...
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;
-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; retainin...
dev_name(dev));
return false;
-
--[[linux-4.4.1/pr_warn()]]
--[[linux-4.4.1/dev_name()]]
}
*コメント [#uaad4962]
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