patch-2.4.20 linux-2.4.20/include/asm-x86_64/pci.h

• Lines: 276
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/include/asm-x86_64/pci.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/include/asm-x86_64/pci.h linux-2.4.20/include/asm-x86_64/pci.h
@@ -0,0 +1,275 @@
+#ifndef __x8664_PCI_H
+#define __x8664_PCI_H
+
+#include <linux/config.h>
+#include <asm/io.h>
+
+#ifdef __KERNEL__
+
+extern dma_addr_t bad_dma_address;
+
+/* Can be used to override the logic in pci_scan_bus for skipping
+   already-configured bus numbers - to be used for buggy BIOSes
+   or architectures with incomplete PCI setup by the loader */
+
+#ifdef CONFIG_PCI
+extern unsigned int pcibios_assign_all_busses(void);
+#else
+#define pcibios_assign_all_busses()	0
+#endif
+
+extern unsigned long pci_mem_start;
+#define PCIBIOS_MIN_IO		0x1000
+#define PCIBIOS_MIN_MEM		(pci_mem_start)
+
+void pcibios_set_master(struct pci_dev *dev);
+void pcibios_penalize_isa_irq(int irq);
+struct irq_routing_table *pcibios_get_irq_routing_table(void);
+int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <asm/scatterlist.h>
+#include <linux/string.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/mmzone.h>
+
+struct pci_dev;
+
+/* Allocate and map kernel buffer using consistent mode DMA for a device.
+ * hwdev should be valid struct pci_dev pointer for PCI devices,
+ * NULL for PCI-like buses (ISA, EISA).
+ * Returns non-NULL cpu-view pointer to the buffer if successful and
+ * sets *dma_addrp to the pci side dma address as well, else *dma_addrp
+ * is undefined.
+ */
+extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
+				  dma_addr_t *dma_handle);
+
+/* Free and unmap a consistent DMA buffer.
+ * cpu_addr is what was returned from pci_alloc_consistent,
+ * size must be the same as what as passed into pci_alloc_consistent,
+ * and likewise dma_addr must be the same as what *dma_addrp was set to.
+ *
+ * References to the memory and mappings associated with cpu_addr/dma_addr
+ * past this call are illegal.
+ */
+extern void pci_free_consistent(struct pci_dev *hwdev, size_t size,
+				void *vaddr, dma_addr_t dma_handle);
+
+#ifdef CONFIG_GART_IOMMU
+
+/* Map a single buffer of the indicated size for DMA in streaming mode.
+ * The 32-bit bus address to use is returned.
+ *
+ * Once the device is given the dma address, the device owns this memory
+ * until either pci_unmap_single or pci_dma_sync_single is performed.
+ */
+extern dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr,
+			  size_t size, int direction);
+
+extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t addr,
+				   size_t size, int direction);
+
+/*
+ * pci_{map,unmap}_single_page maps a kernel page to a dma_addr_t. identical
+ * to pci_map_single, but takes a struct page instead of a virtual address
+ */
+
+#define pci_map_page(dev,page,offset,size,dir) \
+	pci_map_single((dev), page_address(page)+(offset), (size), (dir)) 
+
+#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)	\
+	dma_addr_t ADDR_NAME;
+#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)		\
+	__u32 LEN_NAME;
+#define pci_unmap_addr(PTR, ADDR_NAME)			\
+	((PTR)->ADDR_NAME)
+#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)		\
+	(((PTR)->ADDR_NAME) = (VAL))
+#define pci_unmap_len(PTR, LEN_NAME)			\
+	((PTR)->LEN_NAME)
+#define pci_unmap_len_set(PTR, LEN_NAME, VAL)		\
+	(((PTR)->LEN_NAME) = (VAL))
+
+static inline void pci_dma_sync_single(struct pci_dev *hwdev, 
+				       dma_addr_t dma_handle,
+				       size_t size, int direction)
+{
+	BUG_ON(direction == PCI_DMA_NONE); 
+} 
+
+static inline void pci_dma_sync_sg(struct pci_dev *hwdev, 
+				   struct scatterlist *sg,
+				   int nelems, int direction)
+{ 
+	BUG_ON(direction == PCI_DMA_NONE); 
+} 
+
+/* The PCI address space does equal the physical memory
+ * address space.  The networking and block device layers use
+ * this boolean for bounce buffer decisions.
+ */
+#define PCI_DMA_BUS_IS_PHYS	(0)
+
+
+#else
+static inline dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr,
+					size_t size, int direction)
+{
+	dma_addr_t addr; 
+
+	if (direction == PCI_DMA_NONE)
+		out_of_line_bug();	
+	addr = virt_to_bus(ptr); 
+
+	/* 
+	 * This is gross, but what should I do.
+	 * Unfortunately drivers do not test the return value of this.
+	 */
+	if ((addr+size) & ~hwdev->dma_mask) 
+		out_of_line_bug(); 
+	return addr;
+}
+
+static inline void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr,
+				    size_t size, int direction)
+{
+	if (direction == PCI_DMA_NONE)
+		out_of_line_bug();
+	/* Nothing to do */
+}
+
+static inline dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,
+				      unsigned long offset, size_t size, int direction)
+{
+	dma_addr_t addr;
+	if (direction == PCI_DMA_NONE)
+		out_of_line_bug();	
+ 	addr = page_to_pfn(page) * PAGE_SIZE + offset;
+	if ((addr+size) & ~hwdev->dma_mask) 
+		out_of_line_bug();
+	return addr;
+}
+
+/* pci_unmap_{page,single} is a nop so... */
+#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
+#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
+#define pci_unmap_addr(PTR, ADDR_NAME)		(0)
+#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)	do { } while (0)
+#define pci_unmap_len(PTR, LEN_NAME)		(0)
+#define pci_unmap_len_set(PTR, LEN_NAME, VAL)	do { } while (0)
+	
+/* Make physical memory consistent for a single
+ * streaming mode DMA translation after a transfer.
+ *
+ * If you perform a pci_map_single() but wish to interrogate the
+ * buffer using the cpu, yet do not wish to teardown the PCI dma
+ * mapping, you must call this function before doing so.  At the
+ * next point you give the PCI dma address back to the card, the
+ * device again owns the buffer.
+ */
+static inline void pci_dma_sync_single(struct pci_dev *hwdev,
+				       dma_addr_t dma_handle,
+				       size_t size, int direction)
+{
+	if (direction == PCI_DMA_NONE)
+		out_of_line_bug();
+	flush_write_buffers();
+}
+
+/* Make physical memory consistent for a set of streaming
+ * mode DMA translations after a transfer.
+ *
+ * The same as pci_dma_sync_single but for a scatter-gather list,
+ * same rules and usage.
+ */
+static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
+				   struct scatterlist *sg,
+				   int nelems, int direction)
+{
+	if (direction == PCI_DMA_NONE)
+		out_of_line_bug();
+	flush_write_buffers();
+}
+
+#define PCI_DMA_BUS_IS_PHYS	1
+
+#endif
+
+extern int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg,
+		      int nents, int direction);
+extern void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,
+			 int nents, int direction);
+
+
+#define pci_unmap_page pci_unmap_single
+
+/* Return whether the given PCI device DMA address mask can
+ * be supported properly.  For example, if your device can
+ * only drive the low 24-bits during PCI bus mastering, then
+ * you would pass 0x00ffffff as the mask to this function.
+ */
+static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)
+{
+        /*
+         * we fall back to GFP_DMA when the mask isn't all 1s,
+         * so we can't guarantee allocations that must be
+         * within a tighter range than GFP_DMA..
+         */
+        if(mask < 0x00ffffff)
+                return 0;
+
+	return 1;
+}
+
+/* This is always fine. */
+#define pci_dac_dma_supported(pci_dev, mask)	(1)
+
+static __inline__ dma64_addr_t
+pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
+{
+	return ((dma64_addr_t) page_to_bus(page) +
+		(dma64_addr_t) offset);
+}
+
+static __inline__ struct page *
+pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
+{
+	return pfn_to_page(phys_to_pfn(dma_addr)); 
+}
+
+static __inline__ unsigned long
+pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
+{
+	return (dma_addr & ~PAGE_MASK);
+}
+
+static __inline__ void
+pci_dac_dma_sync_single(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
+{
+	flush_write_buffers();
+}
+
+/* These macros should be used after a pci_map_sg call has been done
+ * to get bus addresses of each of the SG entries and their lengths.
+ * You should only work with the number of sg entries pci_map_sg
+ * returns.
+ */
+#define sg_dma_address(sg)	((sg)->dma_address)
+#define sg_dma_len(sg)		((sg)->length)
+
+/* Return the index of the PCI controller for device. */
+static inline int pci_controller_num(struct pci_dev *dev)
+{
+	return 0;
+}
+
+#define HAVE_PCI_MMAP
+extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+			       enum pci_mmap_state mmap_state, int write_combine);
+
+#endif /* __KERNEL__ */
+
+#endif /* __x8664_PCI_H */