FreeBSD/Linux Kernel Cross Reference
sys/dev/qbus/uba.c
1 /* $NetBSD: uba.c,v 1.77 2008/03/11 05:34:02 matt Exp $ */
2 /*
3 * Copyright (c) 1982, 1986 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#)uba.c 7.10 (Berkeley) 12/16/90
31 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91
32 */
33
34 /*
35 * Copyright (c) 1996 Jonathan Stone.
36 * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
37 * All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. All advertising materials mentioning features or use of this software
48 * must display the following acknowledgement:
49 * This product includes software developed by the University of
50 * California, Berkeley and its contributors.
51 * 4. Neither the name of the University nor the names of its contributors
52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 *
67 * @(#)uba.c 7.10 (Berkeley) 12/16/90
68 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91
69 */
70
71 #include <sys/cdefs.h>
72 __KERNEL_RCSID(0, "$NetBSD: uba.c,v 1.77 2008/03/11 05:34:02 matt Exp $");
73
74 #include <sys/param.h>
75 #include <sys/time.h>
76 #include <sys/systm.h>
77 #include <sys/buf.h>
78 #include <sys/proc.h>
79 #include <sys/user.h>
80 #include <sys/conf.h>
81 #include <sys/kernel.h>
82 #include <sys/malloc.h>
83 #include <sys/device.h>
84
85 #include <uvm/uvm_extern.h>
86
87 #include <sys/bus.h>
88 #include <machine/scb.h>
89 #include <sys/cpu.h>
90
91 #include <dev/qbus/ubareg.h>
92 #include <dev/qbus/ubavar.h>
93
94 #include "ioconf.h"
95 #include "locators.h"
96
97 static int ubasearch (device_t, cfdata_t,
98 const int *, void *);
99 static int ubaprint (void *, const char *);
100
101 /*
102 * If we failed to allocate uba resources, put us on a queue to wait
103 * until there is available resources. Resources to compete about
104 * are map registers and BDPs. This is normally only a problem on
105 * Unibus systems, Qbus systems have more map registers than usable.
106 */
107 void
108 uba_enqueue(struct uba_unit *uu)
109 {
110 struct uba_softc *uh;
111 int s;
112
113 uh = device_private(device_parent(uu->uu_dev));
114
115 s = spluba();
116 SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq);
117 splx(s);
118 }
119
120 /*
121 * When a routine that uses resources is finished, the next device
122 * in queue for map registers etc is called. If it succeeds to get
123 * resources, call next, and next, and next...
124 * This routine must be called at spluba.
125 */
126 void
127 uba_done(struct uba_softc *uh)
128 {
129 struct uba_unit *uu;
130
131 while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) {
132 SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq);
133 if ((*uu->uu_ready)(uu) == 0) {
134 SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq);
135 break;
136 }
137 }
138 }
139
140 /*
141 * Each device that needs some handling if an ubareset occurs must
142 * register for reset first through this routine.
143 */
144 void
145 uba_reset_establish(void (*reset)(device_t), device_t dev)
146 {
147 struct uba_softc *uh = device_private(device_parent(dev));
148 struct uba_reset *ur;
149
150 ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_NOWAIT|M_ZERO);
151 if (ur == NULL)
152 panic("uba_reset_establish");
153 ur->ur_dev = dev;
154 ur->ur_reset = reset;
155
156 SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq);
157 }
158
159 /*
160 * Allocate a bunch of map registers and map them to the given address.
161 */
162 int
163 uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags)
164 {
165 int waitok = (flags & UBA_CANTWAIT) == 0;
166 int error;
167
168 if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1,
169 ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT),
170 &ui->ui_dmam)))
171 return error;
172
173 if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr,
174 ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) {
175 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
176 return error;
177 }
178 ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr;
179 return 0;
180 }
181
182 /*
183 * Allocate DMA-able memory and map it on the unibus.
184 */
185 int
186 ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags)
187 {
188 int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
189 int error;
190
191 if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, PAGE_SIZE, 0,
192 &ui->ui_seg, 1, &ui->ui_rseg, waitok)))
193 return error;
194 if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg,
195 ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) {
196 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
197 return error;
198 }
199 if ((error = uballoc(uh, ui, flags))) {
200 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
201 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
202 }
203 return error;
204 }
205
206 void
207 ubfree(struct uba_softc *uh, struct ubinfo *ui)
208 {
209 bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam);
210 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
211 }
212
213 void
214 ubmemfree(struct uba_softc *uh, struct ubinfo *ui)
215 {
216 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
217 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
218 ubfree(uh, ui);
219 }
220
221 /*
222 * Generate a reset on uba number uban. Then
223 * call each device that asked to be called during attach,
224 * giving it a chance to clean up so as to be able to continue.
225 */
226 void
227 ubareset(struct uba_softc *uh)
228 {
229 struct uba_reset *ur;
230 int s;
231
232 s = spluba();
233 SIMPLEQ_INIT(&uh->uh_resq);
234 printf("%s: reset", device_xname(uh->uh_dev));
235 (*uh->uh_ubainit)(uh);
236
237 ur = SIMPLEQ_FIRST(&uh->uh_resetq);
238 if (ur) do {
239 printf(" %s", device_xname(ur->ur_dev));
240 (*ur->ur_reset)(ur->ur_dev);
241 } while ((ur = SIMPLEQ_NEXT(ur, ur_resetq)));
242
243 printf("\n");
244 splx(s);
245 }
246
247 /*
248 * The common attach routine:
249 * Calls the scan routine to search for uba devices.
250 */
251 void
252 uba_attach(struct uba_softc *sc, paddr_t iopagephys)
253 {
254
255 /*
256 * Set last free interrupt vector for devices with
257 * programmable interrupt vectors. Use is to decrement
258 * this number and use result as interrupt vector.
259 */
260 sc->uh_lastiv = 0x200;
261 SIMPLEQ_INIT(&sc->uh_resq);
262 SIMPLEQ_INIT(&sc->uh_resetq);
263
264 /*
265 * Allocate place for unibus I/O space in virtual space.
266 */
267 if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh))
268 return;
269
270 /*
271 * Keep track of which addressed devices are found.
272 */
273 sc->uh_used = malloc(UBAIOSIZE, M_TEMP, M_WAITOK);
274 memset(sc->uh_used, 0, UBAIOSIZE);
275
276 if (sc->uh_beforescan)
277 (*sc->uh_beforescan)(sc);
278 /*
279 * Now start searching for devices.
280 */
281 config_search_ia(ubasearch, sc->uh_dev, "uba", NULL);
282
283 if (sc->uh_afterscan)
284 (*sc->uh_afterscan)(sc);
285
286 free(sc->uh_used, M_TEMP);
287 }
288
289 int
290 ubasearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
291 {
292 struct uba_softc *sc = device_private(parent);
293 struct uba_attach_args ua;
294 int i, csr, vec, br;
295
296 csr = cf->cf_loc[UBACF_CSR];
297 if (sc->uh_used[ubdevreg(csr)])
298 return 0; /* something are already at this address */
299
300 ua.ua_ioh = ubdevreg(csr) + sc->uh_ioh;
301 ua.ua_iot = sc->uh_iot;
302 ua.ua_dmat = sc->uh_dmat;
303
304 if (badaddr((void *)ua.ua_ioh, 2) ||
305 (sc->uh_errchk ? (*sc->uh_errchk)(sc):0))
306 goto forgetit;
307
308 scb_vecref(0, 0); /* Clear vector ref */
309 i = config_match(parent, cf, &ua);
310
311 if (sc->uh_errchk)
312 if ((*sc->uh_errchk)(sc))
313 goto forgetit;
314 if (i == 0)
315 goto forgetit;
316
317 i = scb_vecref(&vec, &br);
318 if (i == 0)
319 goto fail;
320 if (vec == 0)
321 goto fail;
322
323 ua.ua_br = br;
324 ua.ua_cvec = vec;
325 ua.ua_iaddr = csr;
326 ua.ua_evcnt = NULL;
327
328 sc->uh_used[ubdevreg(csr)] = 1;
329
330 config_attach(parent, cf, &ua, ubaprint);
331 return 0;
332
333 fail:
334 printf("%s%d at %s csr %o %s\n",
335 cf->cf_name, cf->cf_unit, device_xname(parent),
336 csr, (i ? "zero vector" : "didn't interrupt"));
337
338 forgetit:
339 return 0;
340 }
341
342 /*
343 * Print out some interesting info common to all unibus devices.
344 */
345 int
346 ubaprint(void *aux, const char *uba)
347 {
348 struct uba_attach_args *ua = aux;
349
350 aprint_normal(" csr %o vec %o ipl %x", ua->ua_iaddr,
351 ua->ua_cvec & 511, ua->ua_br);
352 return UNCONF;
353 }
354
355 /*
356 * Move to machdep eventually
357 */
358 void
359 uba_intr_establish(void *icookie, int vec, void (*ifunc)(void *iarg),
360 void *iarg, struct evcnt *ev)
361 {
362 scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev);
363 }
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