This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-i386 / mach-xen / asm / pci.h

diff --git a/include/asm-i386/mach-xen/asm/pci.h b/include/asm-i386/mach-xen/asm/pci.h
new file mode 100644 (file)
index 0000000..1ec4470
--- /dev/null
+++ b/include/asm-i386/mach-xen/asm/pci.h
@@ -0,0 +1,154 @@
+#ifndef __i386_PCI_H
+#define __i386_PCI_H
+
+#include <linux/config.h>
+
+#ifdef __KERNEL__
+#include <linux/mm.h>          /* for struct page */
+
+/* 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
+#define pcibios_scan_all_fns(a, b)     0
+
+extern unsigned long pci_mem_start;
+#define PCIBIOS_MIN_IO         0x1000
+#define PCIBIOS_MIN_MEM                (pci_mem_start)
+
+#define PCIBIOS_MIN_CARDBUS_IO 0x4000
+
+void pcibios_config_init(void);
+struct pci_bus * pcibios_scan_root(int bus);
+
+void pcibios_set_master(struct pci_dev *dev);
+void pcibios_penalize_isa_irq(int irq, int active);
+struct irq_routing_table *pcibios_get_irq_routing_table(void);
+int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
+
+/* Dynamic DMA mapping stuff.
+ * i386 has everything mapped statically.
+ */
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <asm/scatterlist.h>
+#include <linux/string.h>
+#include <asm/io.h>
+
+struct pci_dev;
+
+#ifdef CONFIG_SWIOTLB
+
+
+/* On Xen we use SWIOTLB instead of blk-specific bounce buffers. */
+#define PCI_DMA_BUS_IS_PHYS    (0)
+
+#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))
+
+#else
+
+/* 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    (1)
+
+/* 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)
+
+#endif
+
+/* 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_phys(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(dma_addr >> PAGE_SHIFT);
+}
+
+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_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
+{
+}
+
+static inline void
+pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
+{
+       flush_write_buffers();
+}
+
+#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);
+
+
+static inline void pcibios_add_platform_entries(struct pci_dev *dev)
+{
+}
+
+#ifdef CONFIG_PCI
+static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+                                       enum pci_dma_burst_strategy *strat,
+                                       unsigned long *strategy_parameter)
+{
+       *strat = PCI_DMA_BURST_INFINITY;
+       *strategy_parameter = ~0UL;
+}
+#endif
+
+#endif /* __KERNEL__ */
+
+#ifdef CONFIG_XEN_PCIDEV_FRONTEND
+#include <xen/pcifront.h>
+#endif /* CONFIG_XEN_PCIDEV_FRONTEND */
+
+/* implement the pci_ DMA API in terms of the generic device dma_ one */
+#include <asm-generic/pci-dma-compat.h>
+
+/* generic pci stuff */
+#include <asm-generic/pci.h>
+
+/* On Xen we have to scan all functions since Xen hides bridges from
+ * us.  If a bridge is at fn=0 and that slot has a multifunction
+ * device, we won't find the additional devices without scanning all
+ * functions. */
+#undef pcibios_scan_all_fns
+#define pcibios_scan_all_fns(a, b)     1
+
+#endif /* __i386_PCI_H */