patch-2.3.99-pre9 linux/arch/mips/ddb5074/pci-dma.c

• Lines: 39
• Date: Sat May 13 08:29:14 2000
• Orig file: v2.3.99-pre8/linux/arch/mips/ddb5074/pci-dma.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre8/linux/arch/mips/ddb5074/pci-dma.c linux/arch/mips/ddb5074/pci-dma.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2000   Ani Joshi <ajoshi@unixbox.com>
+ *
+ *
+ * Dynamic DMA mapping support.
+ *
+ * swiped from i386, and cloned for MIPS by Geert.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/pci.h>
+#include <asm/io.h>
+
+void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
+			   dma_addr_t *dma_handle)
+{
+	void *ret;
+	int gfp = GFP_ATOMIC;
+
+	if (hwdev == NULL || hwdev->dma_mask != 0xffffffff)
+		gfp |= GFP_DMA;
+	ret = (void *)__get_free_pages(gfp, get_order(size));
+
+	if (ret != NULL) {
+		memset(ret, 0, size);
+		*dma_handle = virt_to_bus(ret);
+	}
+	return ret;
+}
+
+void pci_free_consistent(struct pci_dev *hwdev, size_t size,
+			 void *vaddr, dma_addr_t dma_handle)
+{
+	free_pages((unsigned long)vaddr, get_order(size));
+}