add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/rknpu/rknpu_mm.c
..
..
@@ -236,54 +236,3 @@
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 	return 0;
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 }
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-
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-dma_addr_t rknpu_iommu_dma_alloc_iova(struct iommu_domain *domain, size_t size,
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-				      u64 dma_limit, struct device *dev)
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-{
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-	struct rknpu_iommu_dma_cookie *cookie = domain->iova_cookie;
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-	struct iova_domain *iovad = &cookie->iovad;
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-	unsigned long shift, iova_len, iova = 0;
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-#if (KERNEL_VERSION(5, 4, 0) > LINUX_VERSION_CODE)
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-	dma_addr_t limit;
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-#endif
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-
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-	shift = iova_shift(iovad);
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-	iova_len = size >> shift;
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-	/*
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-	 * Freeing non-power-of-two-sized allocations back into the IOVA caches
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-	 * will come back to bite us badly, so we have to waste a bit of space
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-	 * rounding up anything cacheable to make sure that can't happen. The
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-	 * order of the unadjusted size will still match upon freeing.
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-	 */
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-	if (iova_len < (1 << (IOVA_RANGE_CACHE_MAX_SIZE - 1)))
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-		iova_len = roundup_pow_of_two(iova_len);
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-
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-#if (KERNEL_VERSION(5, 10, 0) <= LINUX_VERSION_CODE)
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-	dma_limit = min_not_zero(dma_limit, dev->bus_dma_limit);
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-#else
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-	if (dev->bus_dma_mask)
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-		dma_limit &= dev->bus_dma_mask;
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-#endif
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-
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-	if (domain->geometry.force_aperture)
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-		dma_limit =
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-			min_t(u64, dma_limit, domain->geometry.aperture_end);
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-
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-#if (KERNEL_VERSION(5, 4, 0) <= LINUX_VERSION_CODE)
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-	iova = alloc_iova_fast(iovad, iova_len, dma_limit >> shift, true);
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-#else
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-	limit = min_t(dma_addr_t, dma_limit >> shift, iovad->end_pfn);
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-
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-	iova = alloc_iova_fast(iovad, iova_len, limit, true);
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-#endif
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-
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-	return (dma_addr_t)iova << shift;
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-}
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-
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-void rknpu_iommu_dma_free_iova(struct rknpu_iommu_dma_cookie *cookie,
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-			       dma_addr_t iova, size_t size)
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-{
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-	struct iova_domain *iovad = &cookie->iovad;
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-
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-	free_iova_fast(iovad, iova_pfn(iovad, iova), size >> iova_shift(iovad));
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-}