diff options
author | Joerg Roedel <jroedel@suse.de> | 2016-07-08 13:31:31 +0200 |
---|---|---|
committer | Joerg Roedel <jroedel@suse.de> | 2016-07-14 10:21:57 +0200 |
commit | b3311b061de2e51db683a67092546876839df532 (patch) | |
tree | 0dbcb2bca12165ed2ebcda37098d3250a73d6472 | |
parent | 281e8ccbff172899a60579773e72ad63d58b3770 (diff) | |
download | linux-b3311b061de2e51db683a67092546876839df532.tar.bz2 |
iommu/amd: Use container_of to get dma_ops_domain
This is better than storing an extra pointer in struct
protection_domain, because this pointer can now be removed
from the struct.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
-rw-r--r-- | drivers/iommu/amd_iommu.c | 36 | ||||
-rw-r--r-- | drivers/iommu/amd_iommu_types.h | 1 |
2 files changed, 26 insertions, 11 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index d13a18633dce..fb43cc5857c7 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -231,6 +231,12 @@ static struct protection_domain *to_pdomain(struct iommu_domain *dom) return container_of(dom, struct protection_domain, domain); } +static struct dma_ops_domain* to_dma_ops_domain(struct protection_domain *domain) +{ + BUG_ON(domain->flags != PD_DMA_OPS_MASK); + return container_of(domain, struct dma_ops_domain, domain); +} + static struct iommu_dev_data *alloc_dev_data(u16 devid) { struct iommu_dev_data *dev_data; @@ -1670,7 +1676,6 @@ static struct dma_ops_domain *dma_ops_domain_alloc(void) dma_dom->domain.mode = PAGE_MODE_2_LEVEL; dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL); dma_dom->domain.flags = PD_DMA_OPS_MASK; - dma_dom->domain.priv = dma_dom; if (!dma_dom->domain.pt_root) goto free_dma_dom; @@ -2367,6 +2372,7 @@ static dma_addr_t map_page(struct device *dev, struct page *page, { phys_addr_t paddr = page_to_phys(page) + offset; struct protection_domain *domain; + struct dma_ops_domain *dma_dom; u64 dma_mask; domain = get_domain(dev); @@ -2376,8 +2382,9 @@ static dma_addr_t map_page(struct device *dev, struct page *page, return DMA_ERROR_CODE; dma_mask = *dev->dma_mask; + dma_dom = to_dma_ops_domain(domain); - return __map_single(dev, domain->priv, paddr, size, dir, dma_mask); + return __map_single(dev, dma_dom, paddr, size, dir, dma_mask); } /* @@ -2387,12 +2394,15 @@ static void unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, enum dma_data_direction dir, struct dma_attrs *attrs) { struct protection_domain *domain; + struct dma_ops_domain *dma_dom; domain = get_domain(dev); if (IS_ERR(domain)) return; - __unmap_single(domain->priv, dma_addr, size, dir); + dma_dom = to_dma_ops_domain(domain); + + __unmap_single(dma_dom, dma_addr, size, dir); } static int sg_num_pages(struct device *dev, @@ -2440,7 +2450,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist, if (IS_ERR(domain)) return 0; - dma_dom = domain->priv; + dma_dom = to_dma_ops_domain(domain); dma_mask = *dev->dma_mask; npages = sg_num_pages(dev, sglist, nelems); @@ -2511,6 +2521,7 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist, struct dma_attrs *attrs) { struct protection_domain *domain; + struct dma_ops_domain *dma_dom; unsigned long startaddr; int npages = 2; @@ -2519,9 +2530,10 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist, return; startaddr = sg_dma_address(sglist) & PAGE_MASK; + dma_dom = to_dma_ops_domain(domain); npages = sg_num_pages(dev, sglist, nelems); - __unmap_single(domain->priv, startaddr, npages << PAGE_SHIFT, dir); + __unmap_single(dma_dom, startaddr, npages << PAGE_SHIFT, dir); } /* @@ -2533,6 +2545,7 @@ static void *alloc_coherent(struct device *dev, size_t size, { u64 dma_mask = dev->coherent_dma_mask; struct protection_domain *domain; + struct dma_ops_domain *dma_dom; struct page *page; domain = get_domain(dev); @@ -2543,6 +2556,7 @@ static void *alloc_coherent(struct device *dev, size_t size, } else if (IS_ERR(domain)) return NULL; + dma_dom = to_dma_ops_domain(domain); size = PAGE_ALIGN(size); dma_mask = dev->coherent_dma_mask; flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); @@ -2562,7 +2576,7 @@ static void *alloc_coherent(struct device *dev, size_t size, if (!dma_mask) dma_mask = *dev->dma_mask; - *dma_addr = __map_single(dev, domain->priv, page_to_phys(page), + *dma_addr = __map_single(dev, dma_dom, page_to_phys(page), size, DMA_BIDIRECTIONAL, dma_mask); if (*dma_addr == DMA_ERROR_CODE) @@ -2586,6 +2600,7 @@ static void free_coherent(struct device *dev, size_t size, struct dma_attrs *attrs) { struct protection_domain *domain; + struct dma_ops_domain *dma_dom; struct page *page; page = virt_to_page(virt_addr); @@ -2595,7 +2610,9 @@ static void free_coherent(struct device *dev, size_t size, if (IS_ERR(domain)) goto free_mem; - __unmap_single(domain->priv, dma_addr, size, DMA_BIDIRECTIONAL); + dma_dom = to_dma_ops_domain(domain); + + __unmap_single(dma_dom, dma_addr, size, DMA_BIDIRECTIONAL); free_mem: if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT)) @@ -2888,7 +2905,7 @@ static void amd_iommu_domain_free(struct iommu_domain *dom) queue_flush_all(); /* Now release the domain */ - dma_dom = domain->priv; + dma_dom = to_dma_ops_domain(domain); dma_ops_domain_free(dma_dom); break; default: @@ -3076,8 +3093,7 @@ static void amd_iommu_apply_dm_region(struct device *dev, struct iommu_domain *domain, struct iommu_dm_region *region) { - struct protection_domain *pdomain = to_pdomain(domain); - struct dma_ops_domain *dma_dom = pdomain->priv; + struct dma_ops_domain *dma_dom = to_dma_ops_domain(to_pdomain(domain)); unsigned long start, end; start = IOVA_PFN(region->start); diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index 590956ac704e..caf5e3822715 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -421,7 +421,6 @@ struct protection_domain { bool updated; /* complete domain flush required */ unsigned dev_cnt; /* devices assigned to this domain */ unsigned dev_iommu[MAX_IOMMUS]; /* per-IOMMU reference count */ - void *priv; /* private data */ }; /* |