1 /* $OpenBSD: rbus.c,v 1.8 2004/07/09 19:12:40 brad Exp $ */
2 /* $NetBSD: rbus.c,v 1.3 1999/11/06 06:20:53 soren Exp $ */
3 /*
4 * Copyright (c) 1999
5 * HAYAKAWA Koichi. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by HAYAKAWA Koichi.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33
34
35 #include <sys/types.h>
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/device.h>
39 #include <sys/malloc.h>
40 #include <sys/extent.h>
41
42 #include <machine/bus.h>
43
44 #include <dev/cardbus/rbus.h>
45
46 /* #define RBUS_DEBUG */
47
48 #if defined RBUS_DEBUG
49 #define STATIC
50 #define DPRINTF(a) printf a
51 #define DDELAY(x) delay((x)*1000*1000)
52 #else
53 #define STATIC static
54 #define DPRINTF(a)
55 #endif
56
57
58
59 static rbus_tag_t rbus_new_body(bus_space_tag_t bt, rbus_tag_t parent,
60 struct extent *ex, bus_addr_t start,
61 bus_addr_t end, bus_addr_t offset,
62 int flags);
63
64
65 int
rbus_space_alloc(rbt,addr,size,mask,align,flags,addrp,bshp)66 rbus_space_alloc(rbt, addr, size, mask, align, flags, addrp, bshp)
67 rbus_tag_t rbt;
68 bus_addr_t addr;
69 bus_size_t size;
70 bus_addr_t mask, align;
71 int flags;
72 bus_addr_t *addrp;
73 bus_space_handle_t *bshp;
74 {
75 return rbus_space_alloc_subregion(rbt, rbt->rb_start, rbt->rb_end, addr,
76 size, mask, align, flags, addrp, bshp);
77 }
78
79
80
81
82 int
rbus_space_alloc_subregion(rbt,substart,subend,addr,size,mask,align,flags,addrp,bshp)83 rbus_space_alloc_subregion(rbt, substart, subend, addr, size, mask, align, flags, addrp, bshp)
84 rbus_tag_t rbt;
85 bus_addr_t addr;
86 bus_addr_t substart;
87 bus_addr_t subend;
88 bus_size_t size;
89 bus_addr_t mask, align;
90 int flags;
91 bus_addr_t *addrp;
92 bus_space_handle_t *bshp;
93 {
94 bus_addr_t decodesize = mask + 1;
95 bus_addr_t boundary, search_addr;
96 int val;
97 u_long result;
98 int exflags = EX_FAST | EX_NOWAIT | EX_MALLOCOK;
99
100 DPRINTF(("rbus_space_alloc: addr %lx, size %lx, mask %lx, align %lx\n",
101 (u_long)addr, (u_long)size, (u_long)mask, (u_long)align));
102
103 addr += rbt->rb_offset;
104
105 if (mask == 0) {
106 /* FULL Decode */
107 decodesize = 0;
108 }
109
110 if (rbt->rb_flags == RBUS_SPACE_ASK_PARENT) {
111 return rbus_space_alloc(rbt->rb_parent, addr, size, mask, align, flags,
112 addrp, bshp);
113 } else if (rbt->rb_flags == RBUS_SPACE_SHARE ||
114 rbt->rb_flags == RBUS_SPACE_DEDICATE) {
115 /* rbt has its own sh_extent */
116
117 /* sanity check: the subregion [substart, subend] should be
118 smaller than the region included in sh_extent */
119 if (substart < rbt->rb_ext->ex_start || subend > rbt->rb_ext->ex_end) {
120 DPRINTF(("rbus: out of range\n"));
121 return 1;
122 }
123
124 if (decodesize == align) {
125 if(extent_alloc_subregion(rbt->rb_ext, substart, subend, size, align, 0,
126 0, exflags, &result)) {
127 return 1;
128 }
129 } else if (decodesize == 0) {
130 /* maybe, the register is overflowed. */
131
132 if (extent_alloc_subregion(rbt->rb_ext, addr, addr + size, size,
133 1, 0, 0, exflags, &result)) {
134 return 1;
135 }
136 } else {
137
138 boundary = decodesize > align ? decodesize : align;
139
140 search_addr = (substart & ~(boundary - 1)) + addr;
141
142 if (search_addr < substart) {
143 search_addr += boundary;
144 }
145
146 val = 1;
147 for (; search_addr + size <= subend; search_addr += boundary) {
148 val = extent_alloc_subregion(rbt->rb_ext,search_addr, search_addr+size,
149 size, align, 0, 0, exflags, &result);
150 DPRINTF(("rbus: trying [%lx:%lx] %lx\n",
151 (u_long)search_addr,
152 (u_long)search_addr+size, (u_long)align));
153 if (val == 0) {
154 break;
155 }
156 }
157 if (val != 0) {
158 /* no space found */
159 DPRINTF(("rbus: no space found\n"));
160 return 1;
161 }
162 }
163
164 if(md_space_map(rbt->rb_bt, result, size, flags, bshp)) {
165 /* map failed */
166 extent_free(rbt->rb_ext, result, size, exflags);
167 return 1;
168 }
169
170 if (addrp != NULL) {
171 *addrp = result + rbt->rb_offset;
172 }
173 return 0;
174 } else {
175 /* error!! */
176 DPRINTF(("rbus: no rbus type\n"));
177 return 1;
178 }
179 }
180
181
182
183
184
185 int
rbus_space_free(rbt,bsh,size,addrp)186 rbus_space_free(rbt, bsh, size, addrp)
187 rbus_tag_t rbt;
188 bus_space_handle_t bsh;
189 bus_size_t size;
190 bus_addr_t *addrp;
191 {
192 int exflags = EX_FAST | EX_NOWAIT;
193 bus_addr_t addr;
194 int status = 1;
195
196 if (rbt->rb_flags == RBUS_SPACE_ASK_PARENT) {
197 status = rbus_space_free(rbt->rb_parent, bsh, size, &addr);
198 } else if (rbt->rb_flags == RBUS_SPACE_SHARE ||
199 rbt->rb_flags == RBUS_SPACE_DEDICATE) {
200 md_space_unmap(rbt->rb_bt, bsh, size, &addr);
201
202 extent_free(rbt->rb_ext, addr, size, exflags);
203
204 status = 0;
205 } else {
206 /* error. INVALID rbustag */
207 status = 1;
208 }
209 if (addrp != NULL) {
210 *addrp = addr;
211 }
212 return status;
213 }
214
215
216
217 /*
218 * static rbus_tag_t
219 * rbus_new_body(bus_space_tag_t bt, rbus_tag_t parent,
220 * struct extent *ex, bus_addr_t start, bus_size_t end,
221 * bus_addr_t offset, int flags)
222 *
223 */
224 static rbus_tag_t
rbus_new_body(bt,parent,ex,start,end,offset,flags)225 rbus_new_body(bt, parent, ex, start, end, offset, flags)
226 bus_space_tag_t bt;
227 rbus_tag_t parent;
228 struct extent *ex;
229 bus_addr_t start, end, offset;
230 int flags;
231 {
232 rbus_tag_t rb;
233
234 /* sanity check */
235 if (parent != NULL) {
236 if (start < parent->rb_start || end > parent->rb_end) {
237 /* out of range: [start, size] should be contained in parent space */
238 return 0;
239 /* Should I invoke panic? */
240 }
241 }
242
243 if (NULL == (rb = (rbus_tag_t)malloc(sizeof(struct rbustag), M_DEVBUF,
244 M_NOWAIT))) {
245 panic("no memory for rbus instance");
246 }
247
248 rb->rb_bt = bt;
249 rb->rb_parent = parent;
250 rb->rb_start = start;
251 rb->rb_end = end;
252 rb->rb_offset = offset;
253 rb->rb_flags = flags;
254 rb->rb_ext = ex;
255
256 DPRINTF(("rbus_new_body: [%lx, %lx] type %s name [%s]\n",
257 (u_long)start, (u_long)end,
258 flags == RBUS_SPACE_SHARE ? "share" :
259 flags == RBUS_SPACE_DEDICATE ? "dedicated" :
260 flags == RBUS_SPACE_ASK_PARENT ? "parent" : "invalid",
261 ex != NULL ? ex->ex_name : "noname"));
262
263 return rb;
264 }
265
266
267
268 /*
269 * rbus_tag_t rbus_new(rbus_tag_t parent, bus_addr_t start, bus_size_t
270 * size, bus_addr_t offset, int flags)
271 *
272 * This function makes a new child rbus instance.
273 */
274 rbus_tag_t
rbus_new(parent,start,size,offset,flags)275 rbus_new(parent, start, size, offset, flags)
276 rbus_tag_t parent;
277 bus_addr_t start;
278 bus_size_t size;
279 bus_addr_t offset;
280 int flags;
281 {
282 rbus_tag_t rb;
283 struct extent *ex = NULL;
284 bus_addr_t end = start + size;
285
286 if (flags == RBUS_SPACE_SHARE) {
287 ex = parent->rb_ext;
288 } else if (flags == RBUS_SPACE_DEDICATE) {
289 if (NULL == (ex = extent_create("rbus", start, end, M_DEVBUF, NULL, 0,
290 EX_NOCOALESCE|EX_NOWAIT))) {
291 return NULL;
292 }
293 } else if (flags == RBUS_SPACE_ASK_PARENT) {
294 ex = NULL;
295 } else {
296 /* Invalid flag */
297 return 0;
298 }
299
300 rb = rbus_new_body(parent->rb_bt, parent, ex, start, start + size,
301 offset, flags);
302
303 if ((rb == NULL) && (flags == RBUS_SPACE_DEDICATE)) {
304 extent_destroy(ex);
305 }
306
307 return rb;
308 }
309
310
311
312
313 /*
314 * rbus_tag_t rbus_new_root_delegate(bus_space_tag, bus_addr_t,
315 * bus_size_t, bus_addr_t offset)
316 *
317 * This function makes a root rbus instance.
318 */
319 rbus_tag_t
rbus_new_root_delegate(bt,start,size,offset)320 rbus_new_root_delegate(bt, start, size, offset)
321 bus_space_tag_t bt;
322 bus_addr_t start;
323 bus_size_t size;
324 bus_addr_t offset;
325 {
326 rbus_tag_t rb;
327 struct extent *ex;
328
329 if (NULL == (ex = extent_create("rbus root", start, start + size, M_DEVBUF,
330 NULL, 0, EX_NOCOALESCE|EX_NOWAIT))) {
331 return NULL;
332 }
333
334 rb = rbus_new_body(bt, NULL, ex, start, start + size, offset,
335 RBUS_SPACE_DEDICATE);
336
337 if (rb == NULL) {
338 extent_destroy(ex);
339 }
340
341 return rb;
342 }
343
344
345
346 /*
347 * rbus_tag_t rbus_new_root_share(bus_space_tag, struct extent *,
348 * bus_addr_t, bus_size_t, bus_addr_t offset)
349 *
350 * This function makes a root rbus instance.
351 */
352 rbus_tag_t
rbus_new_root_share(bt,ex,start,size,offset)353 rbus_new_root_share(bt, ex, start, size, offset)
354 bus_space_tag_t bt;
355 struct extent *ex;
356 bus_addr_t start;
357 bus_size_t size;
358 bus_addr_t offset;
359 {
360 /* sanity check */
361 if (start < ex->ex_start || start + size > ex->ex_end) {
362 /* out of range: [start, size] should be contained in parent space */
363 return 0;
364 /* Should I invoke panic? */
365 }
366
367 return rbus_new_body(bt, NULL, ex, start, start + size, offset,
368 RBUS_SPACE_SHARE);
369 }
370
371
372
373
374
375 /*
376 * int rbus_delete (rbus_tag_t rb)
377 *
378 * This function deletes the rbus structure pointed in the argument.
379 */
380 int
rbus_delete(rb)381 rbus_delete(rb)
382 rbus_tag_t rb;
383 {
384 DPRINTF(("rbus_delete called [%s]\n",
385 rb->rb_ext != NULL ? rb->rb_ext->ex_name : "noname"));
386 if (rb->rb_flags == RBUS_SPACE_DEDICATE) {
387 extent_destroy(rb->rb_ext);
388 }
389
390 free(rb, M_DEVBUF);
391
392 return 0;
393 }
394