Annotation of sys/arch/alpha/tc/tc_dma_3000_500.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: tc_dma_3000_500.c,v 1.2 2006/04/04 21:20:40 brad Exp $ */
! 2: /* $NetBSD: tc_dma_3000_500.c,v 1.13 2001/07/19 06:40:03 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
! 10: * NASA Ames Research Center.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: #define _ALPHA_BUS_DMA_PRIVATE
! 42:
! 43: #include <sys/param.h>
! 44: #include <sys/systm.h>
! 45: #include <sys/device.h>
! 46: #include <sys/kernel.h>
! 47: #include <sys/malloc.h>
! 48:
! 49: #include <uvm/uvm_extern.h>
! 50:
! 51: #include <machine/bus.h>
! 52:
! 53: #include <dev/tc/tcvar.h>
! 54: #include <alpha/tc/tc_sgmap.h>
! 55: #include <alpha/tc/tc_dma_3000_500.h>
! 56:
! 57: struct alpha_bus_dma_tag tc_dmat_sgmap = {
! 58: NULL, /* _cookie */
! 59: 0, /* _wbase */
! 60: 0, /* _wsize */
! 61: NULL, /* _next_window */
! 62: 0, /* _boundary */
! 63: NULL, /* _sgmap */
! 64: 0, /* _pfthresh */
! 65: NULL, /* _get_tag */
! 66: tc_bus_dmamap_create_sgmap,
! 67: tc_bus_dmamap_destroy_sgmap,
! 68: tc_bus_dmamap_load_sgmap,
! 69: tc_bus_dmamap_load_mbuf_sgmap,
! 70: tc_bus_dmamap_load_uio_sgmap,
! 71: tc_bus_dmamap_load_raw_sgmap,
! 72: tc_bus_dmamap_unload_sgmap,
! 73: _bus_dmamap_sync,
! 74: _bus_dmamem_alloc,
! 75: _bus_dmamem_free,
! 76: _bus_dmamem_map,
! 77: _bus_dmamem_unmap,
! 78: _bus_dmamem_mmap,
! 79: };
! 80:
! 81: struct tc_dma_slot_info {
! 82: struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */
! 83: struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */
! 84: };
! 85: struct tc_dma_slot_info *tc_dma_slot_info;
! 86:
! 87: void
! 88: tc_dma_init_3000_500(nslots)
! 89: int nslots;
! 90: {
! 91: extern struct alpha_bus_dma_tag tc_dmat_direct;
! 92: size_t sisize;
! 93: int i;
! 94:
! 95: /* Allocate per-slot DMA info. */
! 96: sisize = nslots * sizeof(struct tc_dma_slot_info);
! 97: tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT);
! 98: if (tc_dma_slot_info == NULL)
! 99: panic("tc_dma_init: can't allocate per-slot DMA info");
! 100: memset(tc_dma_slot_info, 0, sisize);
! 101:
! 102: /* Default all slots to direct-mapped. */
! 103: for (i = 0; i < nslots; i++)
! 104: memcpy(&tc_dma_slot_info[i].tdsi_dmat, &tc_dmat_direct,
! 105: sizeof(tc_dma_slot_info[i].tdsi_dmat));
! 106: }
! 107:
! 108: /*
! 109: * Return the DMA tag for the given slot.
! 110: */
! 111: bus_dma_tag_t
! 112: tc_dma_get_tag_3000_500(slot)
! 113: int slot;
! 114: {
! 115:
! 116: return (&tc_dma_slot_info[slot].tdsi_dmat);
! 117: }
! 118:
! 119: /*
! 120: * Create a TurboChannel SGMAP-mapped DMA map.
! 121: */
! 122: int
! 123: tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary,
! 124: flags, dmamp)
! 125: bus_dma_tag_t t;
! 126: bus_size_t size;
! 127: int nsegments;
! 128: bus_size_t maxsegsz;
! 129: bus_size_t boundary;
! 130: int flags;
! 131: bus_dmamap_t *dmamp;
! 132: {
! 133: bus_dmamap_t map;
! 134: int error;
! 135:
! 136: error = _bus_dmamap_create(t, size, nsegments, maxsegsz,
! 137: boundary, flags, dmamp);
! 138: if (error)
! 139: return (error);
! 140:
! 141: map = *dmamp;
! 142:
! 143: /* XXX BUS_DMA_ALLOCNOW */
! 144:
! 145: return (error);
! 146: }
! 147:
! 148: /*
! 149: * Destroy a TurboChannel SGMAP-mapped DMA map.
! 150: */
! 151: void
! 152: tc_bus_dmamap_destroy_sgmap(t, map)
! 153: bus_dma_tag_t t;
! 154: bus_dmamap_t map;
! 155: {
! 156:
! 157: KASSERT(map->dm_mapsize == 0);
! 158:
! 159: _bus_dmamap_destroy(t, map);
! 160: }
! 161:
! 162: /*
! 163: * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer.
! 164: */
! 165: int
! 166: tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags)
! 167: bus_dma_tag_t t;
! 168: bus_dmamap_t map;
! 169: void *buf;
! 170: bus_size_t buflen;
! 171: struct proc *p;
! 172: int flags;
! 173: {
! 174: struct tc_dma_slot_info *tdsi = t->_cookie;
! 175:
! 176: return (tc_sgmap_load(t, map, buf, buflen, p, flags,
! 177: &tdsi->tdsi_sgmap));
! 178: }
! 179:
! 180: /*
! 181: * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain.
! 182: */
! 183: int
! 184: tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags)
! 185: bus_dma_tag_t t;
! 186: bus_dmamap_t map;
! 187: struct mbuf *m;
! 188: int flags;
! 189: {
! 190: struct tc_dma_slot_info *tdsi = t->_cookie;
! 191:
! 192: return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap));
! 193: }
! 194:
! 195: /*
! 196: * Load a TurboChannel SGMAP-mapped DMA map with a uio.
! 197: */
! 198: int
! 199: tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags)
! 200: bus_dma_tag_t t;
! 201: bus_dmamap_t map;
! 202: struct uio *uio;
! 203: int flags;
! 204: {
! 205: struct tc_dma_slot_info *tdsi = t->_cookie;
! 206:
! 207: return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap));
! 208: }
! 209:
! 210: /*
! 211: * Load a TurboChannel SGMAP-mapped DMA map with raw memory.
! 212: */
! 213: int
! 214: tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags)
! 215: bus_dma_tag_t t;
! 216: bus_dmamap_t map;
! 217: bus_dma_segment_t *segs;
! 218: int nsegs;
! 219: bus_size_t size;
! 220: int flags;
! 221: {
! 222: struct tc_dma_slot_info *tdsi = t->_cookie;
! 223:
! 224: return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags,
! 225: &tdsi->tdsi_sgmap));
! 226: }
! 227:
! 228: /*
! 229: * Unload a TurboChannel SGMAP-mapped DMA map.
! 230: */
! 231: void
! 232: tc_bus_dmamap_unload_sgmap(t, map)
! 233: bus_dma_tag_t t;
! 234: bus_dmamap_t map;
! 235: {
! 236: struct tc_dma_slot_info *tdsi = t->_cookie;
! 237:
! 238: /*
! 239: * Invalidate any SGMAP page table entries used by this
! 240: * mapping.
! 241: */
! 242: tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap);
! 243:
! 244: /*
! 245: * Do the generic bits of the unload.
! 246: */
! 247: _bus_dmamap_unload(t, map);
! 248: }
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