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 #ifdef CONFIG_PCI
  61 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  62                                         enum pci_dma_burst_strategy *strat,
  63                                         unsigned long *strategy_parameter)
  64 {
  65         *strat = PCI_DMA_BURST_INFINITY;
  66         *strategy_parameter = ~0UL;
  67 }
  68 #endif
  69
  70 /*
  71  *      These are pretty much arbitary with the CoMEM implementation.
  72  *      We have the whole address space to ourselves.
  73  */
  74 #define PCIBIOS_MIN_IO          0x100
  75 #define PCIBIOS_MIN_MEM         0x00010000
  76
  77 /* Make physical memory consistent for a single
  78  * streaming mode DMA translation after a transfer.
  79  *
  80  * If you perform a pci_map_single() but wish to interrogate the
  81  * buffer using the cpu, yet do not wish to teardown the PCI dma
  82  * mapping, you must call this function before doing so.  At the
  83  * next point you give the PCI dma address back to the card, the
  84  * device again owns the buffer.
  85  */
  86 static inline void pci_dma_sync_single(struct pci_dev *hwdev,
  87                                        dma_addr_t dma_handle,
  88                                        size_t size, int direction)
  89 {
  90         if (direction == PCI_DMA_NONE)
  91                 BUG();
  92
  93         frv_cache_wback_inv((unsigned long)bus_to_virt(dma_handle),
  94                             (unsigned long)bus_to_virt(dma_handle) + size);
  95 }
  96
  97 /* Make physical memory consistent for a set of streaming
  98  * mode DMA translations after a transfer.
  99  *
 100  * The same as pci_dma_sync_single but for a scatter-gather list,
 101  * same rules and usage.
 102  */
 103 static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
 104                                    struct scatterlist *sg,
 105                                    int nelems, int direction)
 106 {
 107         int i;
 108
 109         if (direction == PCI_DMA_NONE)
 110                 BUG();
 111
 112         for (i = 0; i < nelems; i++)
 113                 frv_cache_wback_inv(sg_dma_address(&sg[i]),
 114                                     sg_dma_address(&sg[i])+sg_dma_len(&sg[i]));
 115 }
 116
 117
 118 #endif