Annotation of sys/arch/alpha/tc/tc_dma_3000_500.c, Revision 1.1.1.1
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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