Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/ieee1394/dma.h b/drivers/ieee1394/dma.h
new file mode 100644
index 0000000..061550a
--- /dev/null
+++ b/drivers/ieee1394/dma.h
@@ -0,0 +1,78 @@
+/*
+ * DMA region bookkeeping routines
+ *
+ * Copyright (C) 2002 Maas Digital LLC
+ *
+ * This code is licensed under the GPL. See the file COPYING in the root
+ * directory of the kernel sources for details.
+ */
+
+#ifndef IEEE1394_DMA_H
+#define IEEE1394_DMA_H
+
+#include <linux/pci.h>
+#include <asm/scatterlist.h>
+
+/* struct dma_prog_region
+
+ a small, physically-contiguous DMA buffer with random-access,
+ synchronous usage characteristics
+*/
+
+struct dma_prog_region {
+ unsigned char *kvirt; /* kernel virtual address */
+ struct pci_dev *dev; /* PCI device */
+ unsigned int n_pages; /* # of kernel pages */
+ dma_addr_t bus_addr; /* base bus address */
+};
+
+/* clear out all fields but do not allocate any memory */
+void dma_prog_region_init(struct dma_prog_region *prog);
+int dma_prog_region_alloc(struct dma_prog_region *prog, unsigned long n_bytes, struct pci_dev *dev);
+void dma_prog_region_free(struct dma_prog_region *prog);
+
+static inline dma_addr_t dma_prog_region_offset_to_bus(struct dma_prog_region *prog, unsigned long offset)
+{
+ return prog->bus_addr + offset;
+}
+
+/* struct dma_region
+
+ a large, non-physically-contiguous DMA buffer with streaming,
+ asynchronous usage characteristics
+*/
+
+struct dma_region {
+ unsigned char *kvirt; /* kernel virtual address */
+ struct pci_dev *dev; /* PCI device */
+ unsigned int n_pages; /* # of kernel pages */
+ unsigned int n_dma_pages; /* # of IOMMU pages */
+ struct scatterlist *sglist; /* IOMMU mapping */
+ int direction; /* PCI_DMA_TODEVICE, etc */
+};
+
+/* clear out all fields but do not allocate anything */
+void dma_region_init(struct dma_region *dma);
+
+/* allocate the buffer and map it to the IOMMU */
+int dma_region_alloc(struct dma_region *dma, unsigned long n_bytes, struct pci_dev *dev, int direction);
+
+/* unmap and free the buffer */
+void dma_region_free(struct dma_region *dma);
+
+/* sync the CPU's view of the buffer */
+void dma_region_sync_for_cpu(struct dma_region *dma, unsigned long offset, unsigned long len);
+/* sync the IO bus' view of the buffer */
+void dma_region_sync_for_device(struct dma_region *dma, unsigned long offset, unsigned long len);
+
+/* map the buffer into a user space process */
+int dma_region_mmap(struct dma_region *dma, struct file *file, struct vm_area_struct *vma);
+
+/* macro to index into a DMA region (or dma_prog_region) */
+#define dma_region_i(_dma, _type, _index) ( ((_type*) ((_dma)->kvirt)) + (_index) )
+
+/* return the DMA bus address of the byte with the given offset
+ relative to the beginning of the dma_region */
+dma_addr_t dma_region_offset_to_bus(struct dma_region *dma, unsigned long offset);
+
+#endif /* IEEE1394_DMA_H */