1 /* $NetBSD: uba.c,v 1.83 2021/08/07 16:19:15 thorpej 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 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)uba.c 7.10 (Berkeley) 12/16/90
61 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91
62 */
63
64 #include <sys/cdefs.h>
65 __KERNEL_RCSID(0, "$NetBSD: uba.c,v 1.83 2021/08/07 16:19:15 thorpej Exp $");
66
67 #include <sys/param.h>
68 #include <sys/time.h>
69 #include <sys/systm.h>
70 #include <sys/buf.h>
71 #include <sys/proc.h>
72 #include <sys/conf.h>
73 #include <sys/kernel.h>
74 #include <sys/malloc.h>
75 #include <sys/device.h>
76
77 #include <sys/bus.h>
78 #include <machine/scb.h>
79 #include <sys/cpu.h>
80
81 #include <dev/qbus/ubareg.h>
82 #include <dev/qbus/ubavar.h>
83
84 #include "ioconf.h"
85 #include "locators.h"
86
87 static int ubasearch (device_t, cfdata_t,
88 const int *, void *);
89 static int ubaprint (void *, const char *);
90
91 /*
92 * If we failed to allocate uba resources, put us on a queue to wait
93 * until there is available resources. Resources to compete about
94 * are map registers and BDPs. This is normally only a problem on
95 * Unibus systems, Qbus systems have more map registers than usable.
96 */
97 void
uba_enqueue(struct uba_unit * uu)98 uba_enqueue(struct uba_unit *uu)
99 {
100 struct uba_softc *uh;
101 int s;
102
103 uh = device_private(device_parent(uu->uu_dev));
104
105 s = spluba();
106 SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq);
107 splx(s);
108 }
109
110 /*
111 * When a routine that uses resources is finished, the next device
112 * in queue for map registers etc is called. If it succeeds to get
113 * resources, call next, and next, and next...
114 * This routine must be called at spluba.
115 */
116 void
uba_done(struct uba_softc * uh)117 uba_done(struct uba_softc *uh)
118 {
119 struct uba_unit *uu;
120
121 while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) {
122 SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq);
123 if ((*uu->uu_ready)(uu) == 0) {
124 SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq);
125 break;
126 }
127 }
128 }
129
130 /*
131 * Each device that needs some handling if an ubareset occurs must
132 * register for reset first through this routine.
133 */
134 void
uba_reset_establish(void (* reset)(device_t),device_t dev)135 uba_reset_establish(void (*reset)(device_t), device_t dev)
136 {
137 struct uba_softc *uh = device_private(device_parent(dev));
138 struct uba_reset *ur;
139
140 ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_WAITOK|M_ZERO);
141 ur->ur_dev = dev;
142 ur->ur_reset = reset;
143
144 SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq);
145 }
146
147 /*
148 * Allocate a bunch of map registers and map them to the given address.
149 */
150 int
uballoc(struct uba_softc * uh,struct ubinfo * ui,int flags)151 uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags)
152 {
153 int waitok = (flags & UBA_CANTWAIT) == 0;
154 int error;
155
156 if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1,
157 ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT),
158 &ui->ui_dmam)))
159 return error;
160
161 if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr,
162 ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) {
163 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
164 return error;
165 }
166 ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr;
167 return 0;
168 }
169
170 /*
171 * Allocate DMA-able memory and map it on the unibus.
172 */
173 int
ubmemalloc(struct uba_softc * uh,struct ubinfo * ui,int flags)174 ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags)
175 {
176 int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
177 int error;
178
179 if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, PAGE_SIZE, 0,
180 &ui->ui_seg, 1, &ui->ui_rseg, waitok)))
181 return error;
182 if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg,
183 ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) {
184 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
185 return error;
186 }
187 if ((error = uballoc(uh, ui, flags))) {
188 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
189 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
190 }
191 return error;
192 }
193
194 void
ubfree(struct uba_softc * uh,struct ubinfo * ui)195 ubfree(struct uba_softc *uh, struct ubinfo *ui)
196 {
197 bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam);
198 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
199 }
200
201 void
ubmemfree(struct uba_softc * uh,struct ubinfo * ui)202 ubmemfree(struct uba_softc *uh, struct ubinfo *ui)
203 {
204 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
205 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
206 ubfree(uh, ui);
207 }
208
209 /*
210 * Generate a reset on uba number uban. Then
211 * call each device that asked to be called during attach,
212 * giving it a chance to clean up so as to be able to continue.
213 */
214 void
ubareset(struct uba_softc * uh)215 ubareset(struct uba_softc *uh)
216 {
217 struct uba_reset *ur;
218 int s;
219
220 s = spluba();
221 SIMPLEQ_INIT(&uh->uh_resq);
222 printf("%s: reset", device_xname(uh->uh_dev));
223 (*uh->uh_ubainit)(uh);
224
225 ur = SIMPLEQ_FIRST(&uh->uh_resetq);
226 if (ur) do {
227 printf(" %s", device_xname(ur->ur_dev));
228 (*ur->ur_reset)(ur->ur_dev);
229 } while ((ur = SIMPLEQ_NEXT(ur, ur_resetq)));
230
231 printf("\n");
232 splx(s);
233 }
234
235 /*
236 * The common attach routine:
237 * Calls the scan routine to search for uba devices.
238 */
239 void
uba_attach(struct uba_softc * sc,paddr_t iopagephys)240 uba_attach(struct uba_softc *sc, paddr_t iopagephys)
241 {
242
243 /*
244 * Set last free interrupt vector for devices with
245 * programmable interrupt vectors. Use is to decrement
246 * this number and use result as interrupt vector.
247 */
248 sc->uh_lastiv = 0x200;
249 SIMPLEQ_INIT(&sc->uh_resq);
250 SIMPLEQ_INIT(&sc->uh_resetq);
251
252 /*
253 * Allocate place for unibus I/O space in virtual space.
254 */
255 if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh))
256 return;
257
258 /*
259 * Keep track of which addressed devices are found.
260 */
261 sc->uh_used = malloc(UBAIOSIZE, M_TEMP, M_WAITOK);
262 memset(sc->uh_used, 0, UBAIOSIZE);
263
264 if (sc->uh_beforescan)
265 (*sc->uh_beforescan)(sc);
266 /*
267 * Now start searching for devices.
268 */
269 config_search(sc->uh_dev, NULL,
270 CFARGS(.search = ubasearch));
271
272 if (sc->uh_afterscan)
273 (*sc->uh_afterscan)(sc);
274
275 free(sc->uh_used, M_TEMP);
276 }
277
278 int
ubasearch(device_t parent,cfdata_t cf,const int * ldesc,void * aux)279 ubasearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
280 {
281 struct uba_softc *sc = device_private(parent);
282 struct uba_attach_args ua;
283 int i, csr, vec, br;
284
285 csr = cf->cf_loc[UBACF_CSR];
286 if (sc->uh_used[ubdevreg(csr)])
287 return 0; /* something are already at this address */
288
289 ua.ua_ioh = ubdevreg(csr) + sc->uh_ioh;
290 ua.ua_iot = sc->uh_iot;
291 ua.ua_dmat = sc->uh_dmat;
292
293 if (badaddr((void *)ua.ua_ioh, 2) ||
294 (sc->uh_errchk ? (*sc->uh_errchk)(sc):0))
295 goto forgetit;
296
297 scb_vecref(0, 0); /* Clear vector ref */
298 i = config_probe(parent, cf, &ua);
299
300 if (sc->uh_errchk)
301 if ((*sc->uh_errchk)(sc))
302 goto forgetit;
303 if (i == 0)
304 goto forgetit;
305
306 i = scb_vecref(&vec, &br);
307 if (i == 0)
308 goto fail;
309 if (vec == 0)
310 goto fail;
311
312 ua.ua_br = br;
313 ua.ua_cvec = vec;
314 ua.ua_iaddr = csr;
315 ua.ua_evcnt = NULL;
316
317 sc->uh_used[ubdevreg(csr)] = 1;
318
319 config_attach(parent, cf, &ua, ubaprint, CFARGS_NONE);
320 return 0;
321
322 fail:
323 printf("%s%d at %s csr %o %s\n",
324 cf->cf_name, cf->cf_unit, device_xname(parent),
325 csr, (i ? "zero vector" : "didn't interrupt"));
326
327 forgetit:
328 return 0;
329 }
330
331 /*
332 * Print out some interesting info common to all unibus devices.
333 */
334 int
ubaprint(void * aux,const char * uba)335 ubaprint(void *aux, const char *uba)
336 {
337 struct uba_attach_args *ua = aux;
338
339 aprint_normal(" csr %o vec %o ipl %x", ua->ua_iaddr,
340 ua->ua_cvec & 511, ua->ua_br);
341 return UNCONF;
342 }
343
344 /*
345 * Move to machdep eventually
346 */
347 void
uba_intr_establish(void * icookie,int vec,void (* ifunc)(void * iarg),void * iarg,struct evcnt * ev)348 uba_intr_establish(void *icookie, int vec, void (*ifunc)(void *iarg),
349 void *iarg, struct evcnt *ev)
350 {
351 scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev);
352 }
353