include/asm-frv/pci.h

   1 /* pci.h: FR-V specific PCI declarations
   2  *
   3  * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  * - Derived from include/asm-m68k/pci.h
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version
  10  * 2 of the License, or (at your option) any later version.
  11  */
  12
  13 #ifndef ASM_PCI_H
  14 #define ASM_PCI_H
  15
  16 #include <linux/config.h>
  17 #include <linux/mm.h>
  18 #include <asm/scatterlist.h>
  19 #include <asm-generic/pci-dma-compat.h>
  20 #include <asm-generic/pci.h>
  21
  22 struct pci_dev;
  23
  24 #define pcibios_assign_all_busses()     0
  25
  26 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
  27 {
  28 }
  29
  30 extern void pcibios_set_master(struct pci_dev *dev);
  31
  32 extern void pcibios_penalize_isa_irq(int irq);
  33
  34 #ifdef CONFIG_MMU
  35 extern void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle);
  36 extern void consistent_free(void *vaddr);
  37 extern void consistent_sync(void *vaddr, size_t size, int direction);
  38 extern void consistent_sync_page(struct page *page, unsigned long offset,
  39                                  size_t size, int direction);
  40 #endif
  41
  42 extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
  43                                   dma_addr_t *dma_handle);
  44
  45 extern void pci_free_consistent(struct pci_dev *hwdev, size_t size,
  46                                 void *vaddr, dma_addr_t dma_handle);
  47
  48 /* This is always fine. */
  49 #define pci_dac_dma_supported(pci_dev, mask)    (1)
  50
  51 /* Return the index of the PCI controller for device PDEV. */
  52 #define pci_controller_num(PDEV)        (0)
  53
  54 /* The PCI address space does equal the physical memory
  55  * address space.  The networking and block device layers use
  56  * this boolean for bounce buffer decisions.
  57  */
  58 #define PCI_DMA_BUS_IS_PHYS     (1)
  59
  60 /* pci_unmap_{page,single} is a nop so... */
  61 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  62 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  63 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  64 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  65 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  66 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  67
  68 #ifdef CONFIG_PCI
  69 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  70                                         enum pci_dma_burst_strategy *strat,
  71                                         unsigned long *strategy_parameter)
  72 {
  73         *strat = PCI_DMA_BURST_INFINITY;
  74         *strategy_parameter = ~0UL;
  75 }
  76 #endif
  77
  78 /*
  79  *      These are pretty much arbitary with the CoMEM implementation.
  80  *      We have the whole address space to ourselves.
  81  */
  82 #define PCIBIOS_MIN_IO          0x100
  83 #define PCIBIOS_MIN_MEM         0x00010000
  84
  85 /* Make physical memory consistent for a single
  86  * streaming mode DMA translation after a transfer.
  87  *
  88  * If you perform a pci_map_single() but wish to interrogate the
  89  * buffer using the cpu, yet do not wish to teardown the PCI dma
  90  * mapping, you must call this function before doing so.  At the
  91  * next point you give the PCI dma address back to the card, the
  92  * device again owns the buffer.
  93  */
  94 static inline void pci_dma_sync_single(struct pci_dev *hwdev,
  95                                        dma_addr_t dma_handle,
  96                                        size_t size, int direction)
  97 {
  98         if (direction == PCI_DMA_NONE)
  99                 BUG();
 100
 101         frv_cache_wback_inv((unsigned long)bus_to_virt(dma_handle),
 102                             (unsigned long)bus_to_virt(dma_handle) + size);
 103 }
 104
 105 /* Make physical memory consistent for a set of streaming
 106  * mode DMA translations after a transfer.
 107  *
 108  * The same as pci_dma_sync_single but for a scatter-gather list,
 109  * same rules and usage.
 110  */
 111 static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
 112                                    struct scatterlist *sg,
 113                                    int nelems, int direction)
 114 {
 115         int i;
 116
 117         if (direction == PCI_DMA_NONE)
 118                 BUG();
 119
 120         for (i = 0; i < nelems; i++)
 121                 frv_cache_wback_inv(sg_dma_address(&sg[i]),
 122                                     sg_dma_address(&sg[i])+sg_dma_len(&sg[i]));
 123 }
 124
 125
 126 #endif