arch/frv/include/asm/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_FRV_PCI_H
  14 #define _ASM_FRV_PCI_H
  15
  16 #include <linux/mm.h>
  17 #include <asm/scatterlist.h>
  18 #include <asm-generic/pci-dma-compat.h>
  19 #include <asm-generic/pci.h>
  20
  21 struct pci_dev;
  22
  23 #define pcibios_assign_all_busses()     0
  24
  25 extern void pcibios_set_master(struct pci_dev *dev);
  26
  27 extern void pcibios_penalize_isa_irq(int irq);
  28
  29 #ifdef CONFIG_MMU
  30 extern void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle);
  31 extern void consistent_free(void *vaddr);
  32 extern void consistent_sync(void *vaddr, size_t size, int direction);
  33 extern void consistent_sync_page(struct page *page, unsigned long offset,
  34                                  size_t size, int direction);
  35 #endif
  36
  37 extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
  38                                   dma_addr_t *dma_handle);
  39
  40 extern void pci_free_consistent(struct pci_dev *hwdev, size_t size,
  41                                 void *vaddr, dma_addr_t dma_handle);
  42
  43 /* Return the index of the PCI controller for device PDEV. */
  44 #define pci_controller_num(PDEV)        (0)
  45
  46 /* pci_unmap_{page,single} is a nop so... */
  47 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  48 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  49 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  50 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  51 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  52 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  53
  54 #ifdef CONFIG_PCI
  55 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  56                                         enum pci_dma_burst_strategy *strat,
  57                                         unsigned long *strategy_parameter)
  58 {
  59         *strat = PCI_DMA_BURST_INFINITY;
  60         *strategy_parameter = ~0UL;
  61 }
  62 #endif
  63
  64 /*
  65  *      These are pretty much arbitary with the CoMEM implementation.
  66  *      We have the whole address space to ourselves.
  67  */
  68 #define PCIBIOS_MIN_IO          0x100
  69 #define PCIBIOS_MIN_MEM         0x00010000
  70
  71 /* Make physical memory consistent for a single
  72  * streaming mode DMA translation after a transfer.
  73  *
  74  * If you perform a pci_map_single() but wish to interrogate the
  75  * buffer using the cpu, yet do not wish to teardown the PCI dma
  76  * mapping, you must call this function before doing so.  At the
  77  * next point you give the PCI dma address back to the card, the
  78  * device again owns the buffer.
  79  */
  80 static inline void pci_dma_sync_single(struct pci_dev *hwdev,
  81                                        dma_addr_t dma_handle,
  82                                        size_t size, int direction)
  83 {
  84         BUG_ON(direction == PCI_DMA_NONE);
  85
  86         frv_cache_wback_inv((unsigned long)bus_to_virt(dma_handle),
  87                             (unsigned long)bus_to_virt(dma_handle) + size);
  88 }
  89
  90 /* Make physical memory consistent for a set of streaming
  91  * mode DMA translations after a transfer.
  92  *
  93  * The same as pci_dma_sync_single but for a scatter-gather list,
  94  * same rules and usage.
  95  */
  96 static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
  97                                    struct scatterlist *sg,
  98                                    int nelems, int direction)
  99 {
 100         int i;
 101         BUG_ON(direction == PCI_DMA_NONE);
 102
 103         for (i = 0; i < nelems; i++)
 104                 frv_cache_wback_inv(sg_dma_address(&sg[i]),
 105                                     sg_dma_address(&sg[i])+sg_dma_len(&sg[i]));
 106 }
 107
 108 #endif /* _ASM_FRV_PCI_H */