sc_wrap.c revision 1.11 1 /* $NetBSD: sc_wrap.c,v 1.11 1999/09/30 23:01:12 thorpej Exp $ */
2
3 /*
4 * This driver is slow! Need to rewrite.
5 */
6
7 #include <sys/types.h>
8 #include <sys/param.h>
9 #include <sys/systm.h>
10 #include <sys/kernel.h>
11 #include <sys/device.h>
12 #include <sys/proc.h>
13 #include <sys/buf.h>
14 #include <sys/malloc.h>
15
16 #include <dev/scsipi/scsi_all.h>
17 #include <dev/scsipi/scsipi_all.h>
18 #include <dev/scsipi/scsiconf.h>
19 #include <dev/scsipi/scsi_message.h>
20
21 #include <newsmips/dev/scsireg.h>
22 #include <newsmips/dev/dmac_0448.h>
23 #include <newsmips/dev/screg_1185.h>
24
25 #include <machine/locore.h>
26 #include <machine/adrsmap.h>
27 #include <machine/autoconf.h>
28 #include <machine/machConst.h>
29
30 static int cxd1185_match __P((struct device *, struct cfdata *, void *));
31 static void cxd1185_attach __P((struct device *, struct device *, void *));
32
33 struct cfattach sc_ca = {
34 sizeof(struct sc_softc), cxd1185_match, cxd1185_attach
35 };
36
37 void cxd1185_init __P((struct sc_softc *));
38 static void free_scb __P((struct sc_softc *, struct sc_scb *));
39 static struct sc_scb *get_scb __P((struct sc_softc *, int));
40 static int sc_scsi_cmd __P((struct scsipi_xfer *));
41 static int sc_poll __P((struct sc_softc *, int, int));
42 static void sc_sched __P((struct sc_softc *));
43 void sc_done __P((struct sc_scb *));
44 int sc_intr __P((struct sc_softc *));
45 static void cxd1185_timeout __P((void *));
46
47 extern void sc_send __P((struct sc_scb *, int, int));
48 extern int scintr __P((void));
49 extern void scsi_hardreset __P((void));
50 extern int sc_busy __P((struct sc_softc *, int));
51 extern paddr_t kvtophys __P((vaddr_t));
52
53 static int sc_disconnect = IDT_DISCON;
54
55 struct scsipi_device cxd1185_dev = {
56 NULL,
57 NULL,
58 NULL,
59 NULL
60 };
61
62 int
63 cxd1185_match(parent, cf, aux)
64 struct device *parent;
65 struct cfdata *cf;
66 void *aux;
67 {
68 struct confargs *ca = aux;
69
70 if (strcmp(ca->ca_name, "sc"))
71 return 0;
72
73 return 1;
74 }
75
76 void
77 cxd1185_attach(parent, self, aux)
78 struct device *parent, *self;
79 void *aux;
80 {
81 struct sc_softc *sc = (void *)self;
82 struct sc_scb *scb;
83 int i;
84
85 if (sc_idenr & 0x08)
86 sc->scsi_1185AQ = 1;
87 else
88 sc->scsi_1185AQ = 0;
89
90 sc->sc_adapter.scsipi_cmd = sc_scsi_cmd;
91 sc->sc_adapter.scsipi_minphys = minphys;
92
93 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
94 sc->sc_link.adapter_softc = sc;
95 sc->sc_link.scsipi_scsi.adapter_target = 7;
96 sc->sc_link.adapter = &sc->sc_adapter;
97 sc->sc_link.device = &cxd1185_dev;
98 sc->sc_link.openings = 2;
99 sc->sc_link.scsipi_scsi.max_target = 7;
100 sc->sc_link.scsipi_scsi.max_lun = 7;
101 sc->sc_link.type = BUS_SCSI;
102
103 TAILQ_INIT(&sc->ready_list);
104 TAILQ_INIT(&sc->free_list);
105
106 scb = sc->sc_scb;
107 for (i = 0; i < 24; i++) { /* XXX 24 */
108 TAILQ_INSERT_TAIL(&sc->free_list, scb, chain);
109 scb++;
110 }
111
112 cxd1185_init(sc);
113 DELAY(100000);
114
115 printf("\n");
116 config_found(&sc->sc_dev, &sc->sc_link, scsiprint);
117 }
118
119 void
120 cxd1185_init(sc)
121 struct sc_softc *sc;
122 {
123 int i;
124
125 for (i = 0; i < 8; i++)
126 sc->inuse[i] = 0;
127
128 scsi_hardreset();
129 }
130
131 void
132 free_scb(sc, scb)
133 struct sc_softc *sc;
134 struct sc_scb *scb;
135 {
136 int s;
137
138 s = splbio();
139
140 TAILQ_INSERT_HEAD(&sc->free_list, scb, chain);
141
142 /*
143 * If there were none, wake anybody waiting for one to come free,
144 * starting with queued entries.
145 */
146 if (scb->chain.tqe_next == 0)
147 wakeup(&sc->free_list);
148
149 splx(s);
150 }
151
152 struct sc_scb *
153 get_scb(sc, flags)
154 struct sc_softc *sc;
155 int flags;
156 {
157 int s;
158 struct sc_scb *scb;
159
160 s = splbio();
161
162 while ((scb = sc->free_list.tqh_first) == NULL &&
163 (flags & XS_CTL_NOSLEEP) == 0)
164 tsleep(&sc->free_list, PRIBIO, "sc_scb", 0);
165 if (scb) {
166 TAILQ_REMOVE(&sc->free_list, scb, chain);
167 }
168
169 splx(s);
170 return scb;
171 }
172
173 int
174 sc_scsi_cmd(xs)
175 struct scsipi_xfer *xs;
176 {
177 struct scsipi_link *sc_link = xs->sc_link;
178 struct sc_softc *sc = sc_link->adapter_softc;
179 struct sc_scb *scb;
180 int flags, s;
181 int chan;
182
183 flags = xs->xs_control;
184 if ((scb = get_scb(sc, flags)) == NULL)
185 return TRY_AGAIN_LATER;
186
187 scb->xs = xs;
188 scb->flags = 0;
189 scb->sc_ctag = 0;
190 scb->sc_coffset = 0;
191 scb->istatus = 0;
192 scb->tstatus = 0;
193 scb->message = 0;
194 bzero(scb->msgbuf, sizeof(scb->msgbuf));
195
196 s = splbio();
197
198 TAILQ_INSERT_TAIL(&sc->ready_list, scb, chain);
199 sc_sched(sc);
200 splx(s);
201
202 if ((flags & XS_CTL_POLL) == 0)
203 return SUCCESSFULLY_QUEUED;
204
205 chan = sc_link->scsipi_scsi.target;
206
207 if (sc_poll(sc, chan, xs->timeout)) {
208 printf("sc: timeout (retry)\n");
209 if (sc_poll(sc, chan, xs->timeout)) {
210 printf("sc: timeout\n");
211 return COMPLETE;
212 }
213 }
214
215 /* called during autoconfig only... */
216
217 MachFlushCache(); /* Flush all caches */
218 return COMPLETE;
219 }
220
221 /*
222 * Used when interrupt driven I/O isn't allowed, e.g. during boot.
223 */
224 int
225 sc_poll(sc, chan, count)
226 struct sc_softc *sc;
227 int chan, count;
228 {
229 volatile u_char *int_stat = (void *)INTST1;
230 volatile u_char *int_clear = (void *)INTCLR1;
231
232 while (sc_busy(sc, chan)) {
233 if (*int_stat & INTST1_DMA) {
234 *int_clear = INTST1_DMA;
235 if (dmac_gstat & CH_INT(CH_SCSI)) {
236 if (dmac_gstat & CH_MRQ(CH_SCSI)) {
237 DELAY(50);
238 if (dmac_gstat & CH_MRQ(CH_SCSI))
239 printf("dma_poll\n");
240 }
241 DELAY(10);
242 scintr();
243 }
244 }
245 DELAY(1000);
246 count--;
247 if (count <= 0)
248 return 1;
249 }
250 return 0;
251 }
252
253 void
254 sc_sched(sc)
255 struct sc_softc *sc;
256 {
257 struct scsipi_xfer *xs;
258 struct scsipi_link *sc_link;
259 int ie = 0;
260 int flags;
261 int chan, lun;
262 struct sc_scb *scb, *nextscb;
263
264 scb = sc->ready_list.tqh_first;
265 start:
266 if (scb == NULL)
267 return;
268
269 xs = scb->xs;
270 sc_link = xs->sc_link;
271 chan = sc_link->scsipi_scsi.target;
272 flags = xs->xs_control;
273
274 if (cold)
275 flags |= XS_CTL_POLL;
276
277 if (sc->inuse[chan]) {
278 scb = scb->chain.tqe_next;
279 goto start;
280 }
281 sc->inuse[chan] = 1;
282
283 if (flags & XS_CTL_RESET)
284 printf("SCSI RESET\n");
285
286 lun = sc_link->scsipi_scsi.lun;
287
288 scb->identify = MSG_IDENT | sc_disconnect | (lun & IDT_DRMASK);
289 scb->sc_ctrnscnt = xs->datalen;
290
291 /* make va->pa mapping table for dma */
292 if (xs->datalen > 0) {
293 int pages, offset;
294 int i, pn;
295 vaddr_t va;
296
297 /* bzero(&sc->sc_map[chan], sizeof(struct sc_map)); */
298
299 va = (vaddr_t)xs->data;
300
301 offset = va & PGOFSET;
302 pages = (offset + xs->datalen + NBPG -1 ) >> PGSHIFT;
303 if (pages >= NSCMAP)
304 panic("sc_map: Too many pages");
305
306 for (i = 0; i < pages; i++) {
307 pn = kvtophys(va) >> PGSHIFT;
308 sc->sc_map[chan].mp_addr[i] = pn;
309 va += NBPG;
310 }
311
312 sc->sc_map[chan].mp_offset = offset;
313 sc->sc_map[chan].mp_pages = pages;
314 scb->sc_map = &sc->sc_map[chan];
315 }
316
317 if ((flags & XS_CTL_POLL) == 0)
318 ie = SCSI_INTEN;
319
320 if (xs->data)
321 scb->sc_cpoint = (void *)xs->data;
322 else
323 scb->sc_cpoint = scb->msgbuf;
324 scb->scb_softc = sc;
325
326 timeout(cxd1185_timeout, scb, hz * 10);
327 sc_send(scb, chan, ie);
328 untimeout(cxd1185_timeout, scb);
329
330 nextscb = scb->chain.tqe_next;
331
332 TAILQ_REMOVE(&sc->ready_list, scb, chain);
333
334 scb = nextscb;
335
336 goto start;
337 }
338
339 void
340 sc_done(scb)
341 struct sc_scb *scb;
342 {
343 struct scsipi_xfer *xs = scb->xs;
344 struct scsipi_link *sc_link = xs->sc_link;
345 struct sc_softc *sc = sc_link->adapter_softc;
346
347 xs->xs_status |= XS_STS_DONE;
348 xs->resid = 0;
349 xs->status = 0;
350
351 if (scb->istatus != INST_EP) {
352 if (! cold)
353 printf("SC(i): [istatus=0x%x, tstatus=0x%x]\n",
354 scb->istatus, scb->tstatus);
355 xs->error = XS_DRIVER_STUFFUP;
356 }
357
358 switch (scb->tstatus) {
359
360 case TGST_GOOD:
361 break;
362
363 case TGST_CC:
364 break; /* XXX */
365 #if 0
366 chan = sc_link->scsipi_scsi.target;
367 lun = sc_link->scsipi_scsi.lun;
368 scop_rsense(chan, scb, lun, SCSI_INTDIS, 18, 0);
369 if (scb->tstatus != TGST_GOOD) {
370 printf("SC(t2): [istatus=0x%x, tstatus=0x%x]\n",
371 scb->istatus, scb->tstatus);
372 }
373 #endif
374
375 default:
376 printf("SC(t): [istatus=0x%x, tstatus=0x%x]\n",
377 scb->istatus, scb->tstatus);
378 break;
379 }
380
381 scsipi_done(xs);
382 free_scb(sc, scb);
383 sc->inuse[sc_link->scsipi_scsi.target] = 0;
384 sc_sched(sc);
385 }
386
387 int
388 sc_intr(sc)
389 struct sc_softc *sc;
390 {
391 return scintr();
392 }
393
394
395 #if 0
396 /*
397 * SCOP_RSENSE request
398 */
399 void
400 scop_rsense(intr, sc_param, lun, ie, count, param)
401 register int intr;
402 register struct scsi *sc_param;
403 register int lun;
404 register int ie;
405 register int count;
406 register caddr_t param;
407 {
408 bzero(sc_param, sizeof(struct scsi));
409 sc_param->identify = MSG_IDENT | sc_disconnect | (lun & IDT_DRMASK);
410 sc_param->sc_lun = lun;
411
412 sc_param->sc_cpoint = (u_char *)param;
413 sc_param->sc_ctrnscnt = count;
414
415 /* sc_cdb */
416 sc_param->sc_opcode = SCOP_RSENSE;
417 sc_param->sc_count = count;
418
419 sc_go(intr, sc_param, ie, sc_param);
420 }
421 #endif
422
423 void
424 cxd1185_timeout(arg)
425 void *arg;
426 {
427 struct sc_scb *scb = arg;
428 struct scsipi_xfer *xs = scb->xs;
429 struct scsipi_link *sc_link = xs->sc_link;
430 int chan;
431
432 chan = sc_link->scsipi_scsi.target;
433
434 printf("sc: timeout ch=%d\n", chan);
435
436 /* XXX abort transfer and ... */
437 }
438