include/asm-v850/pci.h

   1 /*
   2  * include/asm-v850/pci.h -- PCI support
   3  *
   4  *  Copyright (C) 2001,02,05  NEC Corporation
   5  *  Copyright (C) 2001,02,05  Miles Bader <miles@gnu.org>
   6  *
   7  * This file is subject to the terms and conditions of the GNU General
   8  * Public License.  See the file COPYING in the main directory of this
   9  * archive for more details.
  10  *
  11  * Written by Miles Bader <miles@gnu.org>
  12  */
  13
  14 #ifndef __V850_PCI_H__
  15 #define __V850_PCI_H__
  16
  17 /* Get any platform-dependent definitions.  */
  18 #include <asm/machdep.h>
  19
  20 #define pcibios_scan_all_fns(a, b)      0
  21
  22 /* Generic declarations.  */
  23
  24 struct scatterlist;
  25
  26 extern void pcibios_set_master (struct pci_dev *dev);
  27
  28 /* `Grant' to PDEV the memory block at CPU_ADDR, for doing DMA.  The
  29    32-bit PCI bus mastering address to use is returned.  the device owns
  30    this memory until either pci_unmap_single or pci_dma_sync_single_for_cpu is
  31    performed.  */
  32 extern dma_addr_t
  33 pci_map_single (struct pci_dev *pdev, void *cpu_addr, size_t size, int dir);
  34
  35 /* Return to the CPU the PCI DMA memory block previously `granted' to
  36    PDEV, at DMA_ADDR.  */
  37 extern void
  38 pci_unmap_single (struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
  39                   int dir);
  40
  41 /* Make physical memory consistent for a single streaming mode DMA
  42    translation after a transfer.
  43
  44    If you perform a pci_map_single() but wish to interrogate the
  45    buffer using the cpu, yet do not wish to teardown the PCI dma
  46    mapping, you must call this function before doing so.  At the next
  47    point you give the PCI dma address back to the card, you must first
  48    perform a pci_dma_sync_for_device, and then the device again owns
  49    the buffer.  */
  50 extern void
  51 pci_dma_sync_single_for_cpu (struct pci_dev *dev, dma_addr_t dma_addr,
  52                              size_t size, int dir);
  53
  54 extern void
  55 pci_dma_sync_single_for_device (struct pci_dev *dev, dma_addr_t dma_addr,
  56                                 size_t size, int dir);
  57
  58
  59 /* Do multiple DMA mappings at once.  */
  60 extern int
  61 pci_map_sg (struct pci_dev *pdev, struct scatterlist *sg, int sg_len, int dir);
  62
  63 /* Unmap multiple DMA mappings at once.  */
  64 extern void
  65 pci_unmap_sg (struct pci_dev *pdev, struct scatterlist *sg, int sg_len,
  66               int dir);
  67
  68 /* SG-list versions of pci_dma_sync functions.  */
  69 extern void
  70 pci_dma_sync_sg_for_cpu (struct pci_dev *dev,
  71                          struct scatterlist *sg, int sg_len,
  72                          int dir);
  73 extern void
  74 pci_dma_sync_sg_for_device (struct pci_dev *dev,
  75                             struct scatterlist *sg, int sg_len,
  76                             int dir);
  77
  78 #define pci_map_page(dev, page, offs, size, dir) \
  79   pci_map_single(dev, (page_address(page) + (offs)), size, dir)
  80 #define pci_unmap_page(dev,addr,sz,dir) \
  81   pci_unmap_single(dev, addr, sz, dir)
  82
  83 /* Test for pci_map_single or pci_map_page having generated an error.  */
  84 static inline int
  85 pci_dma_mapping_error (dma_addr_t dma_addr)
  86 {
  87         return dma_addr == 0;
  88 }
  89
  90 /* Allocate and map kernel buffer using consistent mode DMA for PCI
  91    device.  Returns non-NULL cpu-view pointer to the buffer if
  92    successful and sets *DMA_ADDR to the pci side dma address as well,
  93    else DMA_ADDR is undefined.  */
  94 extern void *
  95 pci_alloc_consistent (struct pci_dev *pdev, size_t size, dma_addr_t *dma_addr);
  96
  97 /* Free and unmap a consistent DMA buffer.  CPU_ADDR and DMA_ADDR must
  98    be values that were returned from pci_alloc_consistent.  SIZE must be
  99    the same as what as passed into pci_alloc_consistent.  References to
 100    the memory and mappings assosciated with CPU_ADDR or DMA_ADDR past
 101    this call are illegal.  */
 102 extern void
 103 pci_free_consistent (struct pci_dev *pdev, size_t size, void *cpu_addr,
 104                      dma_addr_t dma_addr);
 105
 106 #ifdef CONFIG_PCI
 107 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 108                                         enum pci_dma_burst_strategy *strat,
 109                                         unsigned long *strategy_parameter)
 110 {
 111         *strat = PCI_DMA_BURST_INFINITY;
 112         *strategy_parameter = ~0UL;
 113 }
 114 #endif
 115
 116 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
 117 extern void pci_iounmap (struct pci_dev *dev, void __iomem *addr);
 118
 119 #endif /* __V850_PCI_H__ */