1 files changed, 276 insertions, 0 deletions

diff --git a/arch/alpha/include/asm/pci.h b/arch/alpha/include/asm/pci.h
new file mode 100644
index 000000000000..2a14302c17a3
--- /dev/null
+++ b/arch/alpha/include/asm/pci.h
@@ -0,0 +1,276 @@
+#ifndef __ALPHA_PCI_H
+#define __ALPHA_PCI_H
+
+#ifdef __KERNEL__
+
+#include <linux/spinlock.h>
+#include <linux/dma-mapping.h>
+#include <asm/scatterlist.h>
+#include <asm/machvec.h>
+
+/*
+ * The following structure is used to manage multiple PCI busses.
+ */
+
+struct pci_dev;
+struct pci_bus;
+struct resource;
+struct pci_iommu_arena;
+struct page;
+
+/* A controller.  Used to manage multiple PCI busses.  */
+
+struct pci_controller {
+        struct pci_controller *next;
+        struct pci_bus *bus;
+        struct resource *io_space;
+        struct resource *mem_space;
+
+        /* The following are for reporting to userland.  The invariant is
+           that if we report a BWX-capable dense memory, we do not report
+           a sparse memory at all, even if it exists.  */
+        unsigned long sparse_mem_base;
+        unsigned long dense_mem_base;
+        unsigned long sparse_io_base;
+        unsigned long dense_io_base;
+
+        /* This one's for the kernel only.  It's in KSEG somewhere.  */
+        unsigned long config_space_base;
+
+        unsigned int index;
+        /* For compatibility with current (as of July 2003) pciutils
+           and XFree86. Eventually will be removed. */
+        unsigned int need_domain_info;
+
+        struct pci_iommu_arena *sg_pci;
+        struct pci_iommu_arena *sg_isa;
+
+        void *sysdata;
+};
+
+/* Override the logic in pci_scan_bus for skipping already-configured
+   bus numbers.  */
+
+#define pcibios_assign_all_busses()     1
+#define pcibios_scan_all_fns(a, b)      0
+
+#define PCIBIOS_MIN_IO          alpha_mv.min_io_address
+#define PCIBIOS_MIN_MEM         alpha_mv.min_mem_address
+
+extern void pcibios_set_master(struct pci_dev *dev);
+
+extern inline void pcibios_penalize_isa_irq(int irq, int active)
+{
+        /* We don't do dynamic PCI IRQ allocation */
+}
+
+/* IOMMU controls.  */
+
+/* The PCI address space does not 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
+
+/* Allocate and map kernel buffer using consistent mode DMA for PCI
+   device.  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 *, size_t,
+                                    dma_addr_t *, gfp_t);
+static inline void *
+pci_alloc_consistent(struct pci_dev *dev, size_t size, dma_addr_t *dma)
+{
+        return __pci_alloc_consistent(dev, size, dma, GFP_ATOMIC);
+}
+
+/* Free and unmap a consistent DMA buffer.  CPU_ADDR and DMA_ADDR must
+   be values that were returned from pci_alloc_consistent.  SIZE must
+   be the same as what as passed into pci_alloc_consistent.
+   References to the memory and mappings associated with CPU_ADDR or
+   DMA_ADDR past this call are illegal.  */
+
+extern void pci_free_consistent(struct pci_dev *, size_t, void *, dma_addr_t);
+
+/* Map a single buffer of the indicate size for PCI DMA in streaming mode.
+   The 32-bit PCI bus mastering 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_for_cpu is performed.  */
+
+extern dma_addr_t pci_map_single(struct pci_dev *, void *, size_t, int);
+
+/* Likewise, but for a page instead of an address.  */
+extern dma_addr_t pci_map_page(struct pci_dev *, struct page *,
+                               unsigned long, size_t, int);
+
+/* Test for pci_map_single or pci_map_page having generated an error.  */
+
+static inline int
+pci_dma_mapping_error(struct pci_dev *pdev, dma_addr_t dma_addr)
+{
+        return dma_addr == 0;
+}
+
+/* Unmap a single streaming mode DMA translation.  The DMA_ADDR and
+   SIZE must match what was provided for in a previous pci_map_single
+   call.  All other usages are undefined.  After this call, reads by
+   the cpu to the buffer are guaranteed to see whatever the device
+   wrote there.  */
+
+extern void pci_unmap_single(struct pci_dev *, dma_addr_t, size_t, int);
+extern void pci_unmap_page(struct pci_dev *, dma_addr_t, size_t, int);
+
+/* pci_unmap_{single,page} is not a nop, thus... */
+#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))
+
+/* Map a set of buffers described by scatterlist in streaming mode for
+   PCI DMA.  This is the scatter-gather version of the above
+   pci_map_single interface.  Here the scatter gather list elements
+   are each tagged with the appropriate PCI dma address and length.
+   They are obtained via sg_dma_{address,length}(SG).
+
+   NOTE: An implementation may be able to use a smaller number of DMA
+   address/length pairs than there are SG table elements.  (for
+   example via virtual mapping capabilities) The routine returns the
+   number of addr/length pairs actually used, at most nents.
+
+   Device ownership issues as mentioned above for pci_map_single are
+   the same here.  */
+
+extern int pci_map_sg(struct pci_dev *, struct scatterlist *, int, int);
+
+/* Unmap a set of streaming mode DMA translations.  Again, cpu read
+   rules concerning calls here are the same as for pci_unmap_single()
+   above.  */
+
+extern void pci_unmap_sg(struct pci_dev *, struct scatterlist *, int, int);
+
+/* Make physical memory consistent for a single streaming mode DMA
+   translation after a transfer and device currently has ownership
+   of the buffer.
+
+   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, you must first
+   perform a pci_dma_sync_for_device, and then the device again owns
+   the buffer.  */
+
+static inline void
+pci_dma_sync_single_for_cpu(struct pci_dev *dev, dma_addr_t dma_addr,
+                            long size, int direction)
+{
+        /* Nothing to do.  */
+}
+
+static inline void
+pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr,
+                               size_t size, int direction)
+{
+        /* Nothing to do.  */
+}
+
+/* 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_for_cpu(struct pci_dev *dev, struct scatterlist *sg,
+                        int nents, int direction)
+{
+        /* Nothing to do.  */
+}
+
+static inline void
+pci_dma_sync_sg_for_device(struct pci_dev *dev, struct scatterlist *sg,
+                           int nents, int direction)
+{
+        /* Nothing to do.  */
+}
+
+/* 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.  */
+
+extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);
+
+#ifdef CONFIG_PCI
+static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+                                        enum pci_dma_burst_strategy *strat,
+                                        unsigned long *strategy_parameter)
+{
+        unsigned long cacheline_size;
+        u8 byte;
+
+        pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
+        if (byte == 0)
+                cacheline_size = 1024;
+        else
+                cacheline_size = (int) byte * 4;
+
+        *strat = PCI_DMA_BURST_BOUNDARY;
+        *strategy_parameter = cacheline_size;
+}
+#endif
+
+/* TODO: integrate with include/asm-generic/pci.h ? */
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+        return channel ? 15 : 14;
+}
+
+extern void pcibios_resource_to_bus(struct pci_dev *, struct pci_bus_region *,
+                                    struct resource *);
+
+extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+                                    struct pci_bus_region *region);
+
+static inline struct resource *
+pcibios_select_root(struct pci_dev *pdev, struct resource *res)
+{
+        struct resource *root = NULL;
+
+        if (res->flags & IORESOURCE_IO)
+                root = &ioport_resource;
+        if (res->flags & IORESOURCE_MEM)
+                root = &iomem_resource;
+
+        return root;
+}
+
+#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
+
+static inline int pci_proc_domain(struct pci_bus *bus)
+{
+        struct pci_controller *hose = bus->sysdata;
+        return hose->need_domain_info;
+}
+
+struct pci_dev *alpha_gendev_to_pci(struct device *dev);
+
+#endif /* __KERNEL__ */
+
+/* Values for the `which' argument to sys_pciconfig_iobase.  */
+#define IOBASE_HOSE             0
+#define IOBASE_SPARSE_MEM       1
+#define IOBASE_DENSE_MEM        2
+#define IOBASE_SPARSE_IO        3
+#define IOBASE_DENSE_IO         4
+#define IOBASE_ROOT_BUS         5
+#define IOBASE_FROM_HOSE        0x10000
+
+extern struct pci_dev *isa_bridge;
+
+#endif /* __ALPHA_PCI_H */