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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/m68k/kernel/dma.c
..
..
@@ -6,7 +6,7 @@
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6
 
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 #undef DEBUG
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-#include <linux/dma-noncoherent.h>
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+#include <linux/dma-map-ops.h>
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 #include <linux/device.h>
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 #include <linux/kernel.h>
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 #include <linux/platform_device.h>
..
..
@@ -15,60 +15,24 @@
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 #include <linux/vmalloc.h>
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 #include <linux/export.h>
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-#include <asm/pgalloc.h>
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+#include <asm/cacheflush.h>
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 #if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
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-
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-void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
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-		gfp_t flag, unsigned long attrs)
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+void arch_dma_prep_coherent(struct page *page, size_t size)
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 {
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-	struct page *page, **map;
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-	pgprot_t pgprot;
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-	void *addr;
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-	int i, order;
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+	cache_push(page_to_phys(page), size);
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+}
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-	pr_debug("dma_alloc_coherent: %d,%x\n", size, flag);
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-
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-	size = PAGE_ALIGN(size);
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-	order = get_order(size);
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-
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-	page = alloc_pages(flag, order);
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-	if (!page)
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-		return NULL;
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-
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-	*handle = page_to_phys(page);
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-	map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA);
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-	if (!map) {
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-		__free_pages(page, order);
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-		return NULL;
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+pgprot_t pgprot_dmacoherent(pgprot_t prot)
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+{
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+	if (CPU_IS_040_OR_060) {
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+		pgprot_val(prot) &= ~_PAGE_CACHE040;
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+		pgprot_val(prot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
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+	} else {
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+		pgprot_val(prot) |= _PAGE_NOCACHE030;
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 	}
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-	split_page(page, order);
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-
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-	order = 1 << order;
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-	size >>= PAGE_SHIFT;
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-	map[0] = page;
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-	for (i = 1; i < size; i++)
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-		map[i] = page + i;
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-	for (; i < order; i++)
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-		__free_page(page + i);
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-	pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
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-	if (CPU_IS_040_OR_060)
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-		pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
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-	else
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-		pgprot_val(pgprot) |= _PAGE_NOCACHE030;
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-	addr = vmap(map, size, VM_MAP, pgprot);
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-	kfree(map);
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-
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-	return addr;
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+	return prot;
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 }
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-
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-void arch_dma_free(struct device *dev, size_t size, void *addr,
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-		dma_addr_t handle, unsigned long attrs)
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-{
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-	pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
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-	vfree(addr);
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-}
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-
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 #else
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37
 
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 #include <asm/cacheflush.h>
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@@ -97,8 +61,8 @@
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 #endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
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-void arch_sync_dma_for_device(struct device *dev, phys_addr_t handle,
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-		size_t size, enum dma_data_direction dir)
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+void arch_sync_dma_for_device(phys_addr_t handle, size_t size,
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+		enum dma_data_direction dir)
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 {
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 	switch (dir) {
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 	case DMA_BIDIRECTIONAL:
..
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@@ -112,14 +76,5 @@
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 		pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n",
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 				   dir);
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 		break;
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-	}
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-}
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-
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-void arch_setup_pdev_archdata(struct platform_device *pdev)
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-{
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-	if (pdev->dev.coherent_dma_mask == DMA_MASK_NONE &&
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-	    pdev->dev.dma_mask == NULL) {
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-		pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
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-		pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
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 	}
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 }