| 1 | /* $NetBSD: isadmavar.h,v 1.26 2012/04/29 21:13:56 dsl Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1997, 1998, 2000 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, |
| 9 | * NASA Ames Research Center. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | * POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #ifndef _DEV_ISA_ISADMAVAR_H_ |
| 34 | #define _DEV_ISA_ISADMAVAR_H_ |
| 35 | |
| 36 | #define DMAMODE_WRITE 0x00 |
| 37 | #define DMAMODE_READ 0x01 |
| 38 | #define DMAMODE_SINGLE 0x00 |
| 39 | #define DMAMODE_DEMAND 0x02 |
| 40 | #define DMAMODE_LOOP 0x04 |
| 41 | #define DMAMODE_LOOPDEMAND (DMAMODE_LOOP | DMAMODE_DEMAND) |
| 42 | |
| 43 | /* |
| 44 | * ISA DMA state. This structure is provided by the ISA chipset |
| 45 | * DMA entry points to the generic back-end functions that actually |
| 46 | * frob the controller. |
| 47 | */ |
| 48 | struct isa_dma_state { |
| 49 | device_t ids_dev; /* associated device (for dv_xname) */ |
| 50 | bus_space_tag_t ids_bst; /* bus space tag for DMA controller */ |
| 51 | bus_space_handle_t ids_dma1h; /* handle for DMA controller #1 */ |
| 52 | bus_space_handle_t ids_dma2h; /* handle for DMA controller #2 */ |
| 53 | bus_space_handle_t ids_dmapgh; /* handle for DMA page registers */ |
| 54 | bus_dma_tag_t ids_dmat; /* DMA tag for DMA controller */ |
| 55 | bus_dmamap_t ids_dmamaps[8]; /* DMA maps for each channel */ |
| 56 | bus_size_t ids_dmalength[8]; /* size of DMA transfer per channel */ |
| 57 | bus_size_t ids_maxsize[8]; /* max size per channel */ |
| 58 | int ids_drqmap; /* available DRQs (bitmap) */ |
| 59 | int ids_dmareads; /* state for isa_dmadone() (bitmap) */ |
| 60 | int ids_dmafinished; /* DMA completion state (bitmap) */ |
| 61 | int ids_masked; /* masked channels (bitmap) */ |
| 62 | int ids_frozen; /* `frozen' count */ |
| 63 | int ids_initialized; /* only initialize once... */ |
| 64 | }; |
| 65 | |
| 66 | #define ISA_DMA_DRQ_ISFREE(state, drq) \ |
| 67 | (((state)->ids_drqmap & (1 << (drq))) == 0) |
| 68 | |
| 69 | #define ISA_DMA_DRQ_ALLOC(state, drq) \ |
| 70 | (state)->ids_drqmap |= (1 << (drq)) |
| 71 | |
| 72 | #define ISA_DMA_DRQ_FREE(state, drq) \ |
| 73 | (state)->ids_drqmap &= ~(1 << (drq)) |
| 74 | |
| 75 | #define ISA_DMA_MASK_SET(state, drq) \ |
| 76 | (state)->ids_masked |= (1 << (drq)) |
| 77 | |
| 78 | #define ISA_DMA_MASK_CLR(state, drq) \ |
| 79 | (state)->ids_masked &= ~(1 << (drq)) |
| 80 | |
| 81 | /* |
| 82 | * Memory list used by _isa_malloc(). |
| 83 | */ |
| 84 | struct isa_mem { |
| 85 | struct isa_dma_state *ids; |
| 86 | int chan; |
| 87 | bus_size_t size; |
| 88 | bus_addr_t addr; |
| 89 | void *kva; |
| 90 | struct isa_mem *next; |
| 91 | }; |
| 92 | |
| 93 | #ifdef _KERNEL |
| 94 | struct proc; |
| 95 | |
| 96 | void _isa_dmainit(struct isa_dma_state *, bus_space_tag_t, |
| 97 | bus_dma_tag_t, device_t); |
| 98 | |
| 99 | void _isa_dmadestroy(struct isa_dma_state *); |
| 100 | |
| 101 | int _isa_dmacascade(struct isa_dma_state *, int); |
| 102 | int _isa_dmacascade_stop(struct isa_dma_state *, int); |
| 103 | |
| 104 | bus_size_t _isa_dmamaxsize(struct isa_dma_state *, int); |
| 105 | |
| 106 | int _isa_dmamap_create(struct isa_dma_state *, int, bus_size_t, int); |
| 107 | void _isa_dmamap_destroy(struct isa_dma_state *, int); |
| 108 | |
| 109 | int _isa_dmastart(struct isa_dma_state *, int, void *, bus_size_t, |
| 110 | struct proc *, int, int); |
| 111 | void _isa_dmaabort(struct isa_dma_state *, int); |
| 112 | bus_size_t _isa_dmacount(struct isa_dma_state *, int); |
| 113 | int _isa_dmafinished(struct isa_dma_state *, int); |
| 114 | void _isa_dmadone(struct isa_dma_state *, int); |
| 115 | |
| 116 | void _isa_dmafreeze(struct isa_dma_state *); |
| 117 | void _isa_dmathaw(struct isa_dma_state *); |
| 118 | |
| 119 | int _isa_dmamem_alloc(struct isa_dma_state *, int, bus_size_t, |
| 120 | bus_addr_t *, int); |
| 121 | void _isa_dmamem_free(struct isa_dma_state *, int, bus_addr_t, |
| 122 | bus_size_t); |
| 123 | int _isa_dmamem_map(struct isa_dma_state *, int, bus_addr_t, |
| 124 | bus_size_t, void **, int); |
| 125 | void _isa_dmamem_unmap(struct isa_dma_state *, int, void *, |
| 126 | size_t); |
| 127 | paddr_t _isa_dmamem_mmap(struct isa_dma_state *, int, bus_addr_t, |
| 128 | bus_size_t, off_t, int, int); |
| 129 | |
| 130 | int _isa_drq_alloc(struct isa_dma_state *, int); |
| 131 | int _isa_drq_free(struct isa_dma_state *, int); |
| 132 | int _isa_drq_isfree(struct isa_dma_state *, int); |
| 133 | |
| 134 | #define _isa_malloc(dma_state, c, s, p, f) \ |
| 135 | _isa_malloc(dma_state, c, s, f) |
| 136 | #define _isa_free(v, p) _isa_free(v) |
| 137 | |
| 138 | void *_isa_malloc(struct isa_dma_state *, int, size_t, |
| 139 | struct malloc_type *, int); |
| 140 | void _isa_free(void *, struct malloc_type *); |
| 141 | paddr_t _isa_mappage(void *, off_t, int); |
| 142 | #endif /* _KERNEL */ |
| 143 | |
| 144 | #endif /* _DEV_ISA_ISADMAVAR_H_ */ |
| 145 | |