arm64: dma-mapping: Remove unused dma_map_ops
The iommu_coherent_ops variable is not needed and is never used. Remove it. Change-Id: Ib026ec24520905cbcbb41b31b4bfa141cf87f37b Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Mitchel Humpherys
Liam Mark
parent
9e2d528dc4
commit
baa432900b
1 changed files with 0 additions and 190 deletions
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@ -1577,121 +1577,6 @@ static int __dma_direction_to_prot(enum dma_data_direction dir)
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return prot;
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}
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/*
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* Map a part of the scatter-gather list into contiguous io address space
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*/
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static int __map_sg_chunk(struct device *dev, struct scatterlist *sg,
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size_t size, dma_addr_t *handle,
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enum dma_data_direction dir, struct dma_attrs *attrs,
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bool is_coherent)
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{
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struct dma_iommu_mapping *mapping = dev->archdata.mapping;
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dma_addr_t iova, iova_base;
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int ret = 0;
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unsigned int count;
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struct scatterlist *s;
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int prot;
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size = PAGE_ALIGN(size);
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*handle = DMA_ERROR_CODE;
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iova_base = iova = __alloc_iova(mapping, size);
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if (iova == DMA_ERROR_CODE)
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return -ENOMEM;
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for (count = 0, s = sg; count < (size >> PAGE_SHIFT); s = sg_next(s)) {
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phys_addr_t phys = page_to_phys(sg_page(s));
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unsigned int len = PAGE_ALIGN(s->offset + s->length);
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if (!is_coherent &&
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!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
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__dma_page_cpu_to_dev(sg_page(s), s->offset, s->length,
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dir);
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prot = __dma_direction_to_prot(dir);
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if (!dma_get_attr(DMA_ATTR_EXEC_MAPPING, attrs))
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prot |= IOMMU_NOEXEC;
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ret = iommu_map(mapping->domain, iova, phys, len, prot);
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if (ret < 0)
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goto fail;
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count += len >> PAGE_SHIFT;
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iova += len;
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}
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*handle = iova_base;
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return 0;
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fail:
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iommu_unmap(mapping->domain, iova_base, count * PAGE_SIZE);
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__free_iova(mapping, iova_base, size);
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return ret;
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}
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static int __iommu_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction dir, struct dma_attrs *attrs,
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bool is_coherent)
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{
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struct scatterlist *s = sg, *dma = sg, *start = sg;
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int i, count = 0;
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unsigned int offset = s->offset;
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unsigned int size = s->offset + s->length;
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unsigned int max = dma_get_max_seg_size(dev);
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for (i = 1; i < nents; i++) {
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s = sg_next(s);
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s->dma_address = DMA_ERROR_CODE;
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s->dma_length = 0;
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if (s->offset || (size & ~PAGE_MASK)
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|| size + s->length > max) {
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if (__map_sg_chunk(dev, start, size, &dma->dma_address,
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dir, attrs, is_coherent) < 0)
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goto bad_mapping;
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dma->dma_address += offset;
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dma->dma_length = size - offset;
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size = offset = s->offset;
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start = s;
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dma = sg_next(dma);
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count += 1;
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}
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size += s->length;
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}
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if (__map_sg_chunk(dev, start, size, &dma->dma_address, dir, attrs,
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is_coherent) < 0)
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goto bad_mapping;
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dma->dma_address += offset;
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dma->dma_length = size - offset;
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return count+1;
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bad_mapping:
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for_each_sg(sg, s, count, i)
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__iommu_remove_mapping(dev, sg_dma_address(s), sg_dma_len(s));
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return 0;
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}
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/**
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* arm_coherent_iommu_map_sg - map a set of SG buffers for streaming mode DMA
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* @dev: valid struct device pointer
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* @sg: list of buffers
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* @nents: number of buffers to map
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* @dir: DMA transfer direction
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*
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* Map a set of i/o coherent buffers described by scatterlist in streaming
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* mode for DMA. The scatter gather list elements are merged together (if
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* possible) and tagged with the appropriate dma address and length. They are
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* obtained via sg_dma_{address,length}.
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*/
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int arm_coherent_iommu_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir, struct dma_attrs *attrs)
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{
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return __iommu_map_sg(dev, sg, nents, dir, attrs, true);
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}
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/**
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* arm_iommu_map_sg - map a set of SG buffers for streaming mode DMA
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* @dev: valid struct device pointer
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@ -1741,40 +1626,6 @@ int arm_iommu_map_sg(struct device *dev, struct scatterlist *sg,
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return nents;
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}
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static void __iommu_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir, struct dma_attrs *attrs,
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bool is_coherent)
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{
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struct scatterlist *s;
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int i;
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for_each_sg(sg, s, nents, i) {
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if (sg_dma_len(s))
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__iommu_remove_mapping(dev, sg_dma_address(s),
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sg_dma_len(s));
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if (!is_coherent &&
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!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
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__dma_page_dev_to_cpu(sg_page(s), s->offset,
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s->length, dir);
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}
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}
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/**
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* arm_coherent_iommu_unmap_sg - unmap a set of SG buffers mapped by dma_map_sg
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* @dev: valid struct device pointer
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* @sg: list of buffers
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* @nents: number of buffers to unmap (same as was passed to dma_map_sg)
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* @dir: DMA transfer direction (same as was passed to dma_map_sg)
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*
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* Unmap a set of streaming mode DMA translations. Again, CPU access
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* rules concerning calls here are the same as for dma_unmap_single().
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*/
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void arm_coherent_iommu_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir, struct dma_attrs *attrs)
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{
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__iommu_unmap_sg(dev, sg, nents, dir, attrs, true);
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}
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/**
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* arm_iommu_unmap_sg - unmap a set of SG buffers mapped by dma_map_sg
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* @dev: valid struct device pointer
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@ -1892,31 +1743,6 @@ static dma_addr_t arm_iommu_map_page(struct device *dev, struct page *page,
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return arm_coherent_iommu_map_page(dev, page, offset, size, dir, attrs);
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}
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/**
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* arm_coherent_iommu_unmap_page
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* @dev: valid struct device pointer
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* @handle: DMA address of buffer
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* @size: size of buffer (same as passed to dma_map_page)
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* @dir: DMA transfer direction (same as passed to dma_map_page)
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*
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* Coherent IOMMU aware version of arm_dma_unmap_page()
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*/
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static void arm_coherent_iommu_unmap_page(struct device *dev, dma_addr_t handle,
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size_t size, enum dma_data_direction dir,
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struct dma_attrs *attrs)
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{
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struct dma_iommu_mapping *mapping = dev->archdata.mapping;
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dma_addr_t iova = handle & PAGE_MASK;
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int offset = handle & ~PAGE_MASK;
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int len = PAGE_ALIGN(size + offset);
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if (!iova)
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return;
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iommu_unmap(mapping->domain, iova, len);
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__free_iova(mapping, iova, len);
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}
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/**
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* arm_iommu_unmap_page
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* @dev: valid struct device pointer
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@ -2016,22 +1842,6 @@ const struct dma_map_ops iommu_ops = {
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.mapping_error = arm_iommu_mapping_error,
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};
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const struct dma_map_ops iommu_coherent_ops = {
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.alloc = arm_iommu_alloc_attrs,
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.free = arm_iommu_free_attrs,
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.mmap = arm_iommu_mmap_attrs,
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.get_sgtable = arm_iommu_get_sgtable,
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.map_page = arm_coherent_iommu_map_page,
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.unmap_page = arm_coherent_iommu_unmap_page,
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.map_sg = arm_coherent_iommu_map_sg,
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.unmap_sg = arm_coherent_iommu_unmap_sg,
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.set_dma_mask = arm_dma_set_mask,
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.dma_supported = arm_iommu_dma_supported,
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};
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/**
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* arm_iommu_create_mapping
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* @bus: pointer to the bus holding the client device (for IOMMU calls)
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