1 | /* $ZEL: sis1100_mmap.c,v 1.4 2004/05/27 23:10:27 wuestner Exp $ */
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2 |
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3 | /*
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4 | * Copyright (c) 2001-2004
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5 | * Matthias Drochner, Peter Wuestner. All rights reserved.
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6 | *
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7 | * Redistribution and use in source and binary forms, with or without
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8 | * modification, are permitted provided that the following conditions
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9 | * are met:
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10 | * 1. Redistributions of source code must retain the above copyright
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11 | * notice, this list of conditions, and the following disclaimer.
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12 | * 2. Redistributions in binary form must reproduce the above copyright
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13 | * notice, this list of conditions and the following disclaimer in the
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14 | * documentation and/or other materials provided with the distribution.
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15 | *
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16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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26 | * SUCH DAMAGE.
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27 | */
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28 |
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29 | #include "sis1100_sc.h"
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30 |
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31 | /*
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32 | * this is a macro because of different types used by linux and BSD
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33 | */
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34 | #define _sis1100_mmap(sc, fd, offset, base, size) \
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35 | switch (fd->subdev) { \
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36 | case sis1100_subdev_remote: \
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37 | if (!sc->rem_size) { \
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38 | pINFO(sc, "mmap: remote space not mapped.");\
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39 | LINUX_RETURN(ENOTTY); \
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40 | } \
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41 | base=sc->rem_addr; \
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42 | size=sc->rem_size; \
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43 | break; \
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44 | case sis1100_subdev_ctrl: \
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45 | base=sc->reg_addr; \
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46 | size=sc->reg_size; \
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47 | break; \
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48 | case sis1100_subdev_ram: /* nobreak */ \
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49 | case sis1100_subdev_dsp: \
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50 | size=0; \
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51 | }
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52 |
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53 | #ifdef __NetBSD__
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54 |
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55 | paddr_t
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56 | sis1100_mmap(dev_t handle, off_t off, int prot)
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57 | {
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58 | struct sis1100_softc* sc = SIS1100SC(handle);
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59 | struct sis1100_fdata* fd = SIS1100FD(handle);
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60 |
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61 | u_int32_t size=0;
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62 | bus_addr_t base=0;
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63 | if ((fd->subdev!=sis1100_subdev_ctrl) || (off<sc->reg_size)) {
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64 | _sis1100_mmap(sc, fd, off, base, size)
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65 | return i386_btop(base+off);
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66 | } else { /* dma space for pipeline read */
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67 | if (fd->mmapdma.valid && (off>=fd->mmapdma.off) &&
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68 | (off-fd->mmapdma.off<fd->mmapdma.size)) {
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69 | paddr_t addr=bus_dmamem_mmap(fd->mmapdma.dmat,
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70 | &fd->mmapdma.segs, 1,
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71 | off-fd->mmapdma.off,
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72 | VM_PROT_READ|VM_PROT_WRITE,
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73 | BUS_DMA_WAITOK|BUS_DMA_COHERENT);
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74 | return addr;
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75 | } else {
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76 | return -1;
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77 | }
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78 | }
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79 | }
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80 |
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81 | #elif __linux__
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82 |
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83 | #undef USE_PCI_MMAP
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84 |
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85 | int
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86 | sis1100_mmap(struct file * file, struct vm_area_struct * vma)
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87 | {
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88 | struct sis1100_softc *sc = SIS1100SC(file);
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89 | struct sis1100_fdata *fd = SIS1100FD(file);
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90 |
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91 | u_int32_t size=0;
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92 | int error;
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93 | u_long base=0;
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94 |
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95 | _sis1100_mmap(sc, fd, vma->vm_pgoff, base, size)
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96 |
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97 | /* offset in bytes + size of mapping */
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98 | if ((vma->vm_pgoff<<PAGE_SHIFT)+(vma->vm_end-vma->vm_start)>
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99 | PAGE_ALIGN(size))
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100 | return -EINVAL;
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101 | #ifdef USE_PCI_MMAP
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102 | /* this does only work if base is a multiple of PAGE_SIZE */
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103 | vma->vm_pgoff+=base>>PAGE_SHIFT;
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104 | if ((error=pci_mmap_page_range(sc->pcidev, vma, pci_mmap_mem, 0))<0)
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105 | return error;
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106 | #else
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107 | vma->vm_flags |= VM_RESERVED;
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108 | vma->vm_flags |= VM_IO;
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109 |
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110 | if ((error=io_remap_page_range(
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111 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
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112 | vma,
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113 | #endif
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114 | vma->vm_start, base+(vma->vm_pgoff<<PAGE_SHIFT),
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115 | vma->vm_end-vma->vm_start, vma->vm_page_prot))!=0)
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116 | return error;
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117 | #endif
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118 |
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119 | return 0;
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120 | }
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121 | #endif
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