sc_wrap.c revision 1.5 1 /* $NetBSD: sc_wrap.c,v 1.5 1998/08/21 13:19:43 tsubai 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 extern int cold;
31
32 static int cxd1185_match __P((struct device *, struct cfdata *, void *));
33 static void cxd1185_attach __P((struct device *, struct device *, void *));
34
35 struct cfattach sc_ca = {
36 sizeof(struct sc_softc), cxd1185_match, cxd1185_attach
37 };
38
39 void cxd1185_init __P((struct sc_softc *));
40 static void free_scb __P((struct sc_softc *, struct sc_scb *));
41 static struct sc_scb *get_scb __P((struct sc_softc *, int));
42 static int sc_scsi_cmd __P((struct scsipi_xfer *));
43 static int sc_poll __P((struct sc_softc *, int, int));
44 static void sc_sched __P((struct sc_softc *));
45 void sc_done __P((struct sc_scb *));
46 int sc_intr __P((struct sc_softc *));
47 static void cxd1185_timeout __P((void *));
48
49 extern void sc_send __P((struct sc_scb *, int, int));
50 extern int scintr __P((void));
51 extern void scsi_hardreset __P((void));
52 extern int sc_busy __P((struct sc_softc *, int));
53 extern vm_offset_t kvtophys __P((vm_offset_t));
54
55 static int sc_disconnect = IDT_DISCON;
56
57 struct scsipi_adapter cxd1185_switch = {
58 sc_scsi_cmd,
59 minphys,
60 NULL,
61 NULL
62 };
63
64 struct scsipi_device cxd1185_dev = {
65 NULL,
66 NULL,
67 NULL,
68 NULL
69 };
70
71 int
72 cxd1185_match(parent, cf, aux)
73 struct device *parent;
74 struct cfdata *cf;
75 void *aux;
76 {
77 struct confargs *ca = aux;
78
79 if (strcmp(ca->ca_name, "sc"))
80 return 0;
81
82 return 1;
83 }
84
85 void
86 cxd1185_attach(parent, self, aux)
87 struct device *parent, *self;
88 void *aux;
89 {
90 struct sc_softc *sc = (void *)self;
91 struct sc_scb *scb;
92 int i;
93
94 if (sc_idenr & 0x08)
95 sc->scsi_1185AQ = 1;
96 else
97 sc->scsi_1185AQ = 0;
98
99 sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
100 sc->sc_link.adapter_softc = sc;
101 sc->sc_link.scsipi_scsi.adapter_target = 7;
102 sc->sc_link.adapter = &cxd1185_switch;
103 sc->sc_link.device = &cxd1185_dev;
104 sc->sc_link.openings = 2;
105 sc->sc_link.scsipi_scsi.max_target = 7;
106 sc->sc_link.type = BUS_SCSI;
107
108 TAILQ_INIT(&sc->ready_list);
109 TAILQ_INIT(&sc->free_list);
110
111 scb = sc->sc_scb;
112 for (i = 0; i < 24; i++) { /* XXX 24 */
113 TAILQ_INSERT_TAIL(&sc->free_list, scb, chain);
114 scb++;
115 }
116
117 cxd1185_init(sc);
118 DELAY(100000);
119
120 printf("\n");
121 config_found(&sc->sc_dev, &sc->sc_link, scsiprint);
122 }
123
124 void
125 cxd1185_init(sc)
126 struct sc_softc *sc;
127 {
128 int i;
129
130 for (i = 0; i < 8; i++)
131 sc->inuse[i] = 0;
132
133 scsi_hardreset();
134 }
135
136 void
137 free_scb(sc, scb)
138 struct sc_softc *sc;
139 struct sc_scb *scb;
140 {
141 int s;
142
143 s = splbio();
144
145 TAILQ_INSERT_HEAD(&sc->free_list, scb, chain);
146
147 /*
148 * If there were none, wake anybody waiting for one to come free,
149 * starting with queued entries.
150 */
151 if (scb->chain.tqe_next == 0)
152 wakeup(&sc->free_list);
153
154 splx(s);
155 }
156
157 struct sc_scb *
158 get_scb(sc, flags)
159 struct sc_softc *sc;
160 int flags;
161 {
162 int s;
163 struct sc_scb *scb;
164
165 s = splbio();
166
167 while ((scb = sc->free_list.tqh_first) == NULL &&
168 (flags & SCSI_NOSLEEP) == 0)
169 tsleep(&sc->free_list, PRIBIO, "sc_scb", 0);
170 if (scb) {
171 TAILQ_REMOVE(&sc->free_list, scb, chain);
172 }
173
174 splx(s);
175 return scb;
176 }
177
178 int
179 sc_scsi_cmd(xs)
180 struct scsipi_xfer *xs;
181 {
182 struct scsipi_link *sc_link = xs->sc_link;
183 struct sc_softc *sc = sc_link->adapter_softc;
184 struct sc_scb *scb;
185 int flags, s;
186 int chan;
187
188 flags = xs->flags;
189 if ((scb = get_scb(sc, flags)) == NULL)
190 return TRY_AGAIN_LATER;
191
192 scb->xs = xs;
193 scb->flags = 0;
194 scb->sc_ctag = 0;
195 scb->sc_coffset = 0;
196 scb->istatus = 0;
197 scb->tstatus = 0;
198 scb->message = 0;
199 bzero(scb->msgbuf, sizeof(scb->msgbuf));
200
201 s = splbio();
202
203 TAILQ_INSERT_TAIL(&sc->ready_list, scb, chain);
204 sc_sched(sc);
205 splx(s);
206
207 if ((flags & SCSI_POLL) == 0)
208 return SUCCESSFULLY_QUEUED;
209
210 chan = sc_link->scsipi_scsi.target;
211
212 if (sc_poll(sc, chan, xs->timeout)) {
213 printf("sc: timeout (retry)\n");
214 if (sc_poll(sc, chan, xs->timeout)) {
215 printf("sc: timeout\n");
216 return COMPLETE;
217 }
218 }
219
220 /* called during autoconfig only... */
221
222 MachFlushCache(); /* Flush all caches */
223 return COMPLETE;
224 }
225
226 /*
227 * Used when interrupt driven I/O isn't allowed, e.g. during boot.
228 */
229 int
230 sc_poll(sc, chan, count)
231 struct sc_softc *sc;
232 int chan, count;
233 {
234 volatile u_char *int_stat = (void *)INTST1;
235 volatile u_char *int_clear = (void *)INTCLR1;
236
237 while (sc_busy(sc, chan)) {
238 if (*int_stat & INTST1_DMA) {
239 *int_clear = INTST1_DMA;
240 if (dmac_gstat & CH_INT(CH_SCSI)) {
241 if (dmac_gstat & CH_MRQ(CH_SCSI)) {
242 DELAY(50);
243 if (dmac_gstat & CH_MRQ(CH_SCSI))
244 printf("dma_poll\n");
245 }
246 DELAY(10);
247 scintr();
248 }
249 }
250 DELAY(1000);
251 count--;
252 if (count <= 0)
253 return 1;
254 }
255 return 0;
256 }
257
258 void
259 sc_sched(sc)
260 struct sc_softc *sc;
261 {
262 struct scsipi_xfer *xs;
263 struct scsipi_link *sc_link;
264 int ie = 0;
265 int flags;
266 int chan, lun;
267 struct sc_scb *scb, *nextscb;
268
269 scb = sc->ready_list.tqh_first;
270 start:
271 if (scb == NULL)
272 return;
273
274 xs = scb->xs;
275 sc_link = xs->sc_link;
276 chan = sc_link->scsipi_scsi.target;
277 flags = xs->flags;
278
279 if (cold)
280 flags |= SCSI_POLL;
281
282 if (sc->inuse[chan]) {
283 scb = scb->chain.tqe_next;
284 goto start;
285 }
286 sc->inuse[chan] = 1;
287
288 if (flags & SCSI_RESET)
289 printf("SCSI RESET\n");
290
291 lun = sc_link->scsipi_scsi.lun;
292
293 scb->identify = MSG_IDENT | sc_disconnect | (lun & IDT_DRMASK);
294 scb->sc_ctrnscnt = xs->datalen;
295
296 /* make va->pa mapping table for dma */
297 if (xs->datalen > 0) {
298 int pages, offset;
299 int i, pn;
300 u_int va;
301
302 /* bzero(&sc->sc_map[chan], sizeof(struct sc_map)); */
303
304 va = (u_int)xs->data;
305
306 offset = va & PGOFSET;
307 pages = (offset + xs->datalen + NBPG -1 ) >> PGSHIFT;
308 if (pages >= NSCMAP)
309 panic("sc_map: Too many pages");
310
311 for (i = 0; i < pages; i++) {
312 pn = kvtophys((vm_offset_t)va) >> PGSHIFT;
313 sc->sc_map[chan].mp_addr[i] = pn;
314 va += NBPG;
315 }
316
317 sc->sc_map[chan].mp_offset = offset;
318 sc->sc_map[chan].mp_pages = pages;
319 scb->sc_map = &sc->sc_map[chan];
320 }
321
322 if ((flags & SCSI_POLL) == 0)
323 ie = SCSI_INTEN;
324
325 if (xs->data)
326 scb->sc_cpoint = (void *)xs->data;
327 else
328 scb->sc_cpoint = scb->msgbuf;
329 scb->scb_softc = sc;
330
331 timeout(cxd1185_timeout, scb, hz * 10);
332 sc_send(scb, chan, ie);
333 untimeout(cxd1185_timeout, scb);
334
335 nextscb = scb->chain.tqe_next;
336
337 TAILQ_REMOVE(&sc->ready_list, scb, chain);
338
339 scb = nextscb;
340
341 goto start;
342 }
343
344 void
345 sc_done(scb)
346 struct sc_scb *scb;
347 {
348 struct scsipi_xfer *xs = scb->xs;
349 struct scsipi_link *sc_link = xs->sc_link;
350 struct sc_softc *sc = sc_link->adapter_softc;
351
352 xs->flags |= ITSDONE;
353 xs->resid = 0;
354 xs->status = 0;
355
356 if (scb->istatus != INST_EP) {
357 if (! cold)
358 printf("SC(i): [istatus=0x%x, tstatus=0x%x]\n",
359 scb->istatus, scb->tstatus);
360 xs->error = XS_DRIVER_STUFFUP;
361 }
362
363 switch (scb->tstatus) {
364
365 case TGST_GOOD:
366 break;
367
368 case TGST_CC:
369 break; /* XXX */
370 #if 0
371 chan = sc_link->scsipi_scsi.target;
372 lun = sc_link->scsipi_scsi.lun;
373 scop_rsense(chan, scb, lun, SCSI_INTDIS, 18, 0);
374 if (scb->tstatus != TGST_GOOD) {
375 printf("SC(t2): [istatus=0x%x, tstatus=0x%x]\n",
376 scb->istatus, scb->tstatus);
377 }
378 #endif
379
380 default:
381 printf("SC(t): [istatus=0x%x, tstatus=0x%x]\n",
382 scb->istatus, scb->tstatus);
383 break;
384 }
385
386 scsipi_done(xs);
387 free_scb(sc, scb);
388 sc->inuse[sc_link->scsipi_scsi.target] = 0;
389 sc_sched(sc);
390 }
391
392 int
393 sc_intr(sc)
394 struct sc_softc *sc;
395 {
396 return scintr();
397 }
398
399
400 #if 0
401 /*
402 * SCOP_RSENSE request
403 */
404 void
405 scop_rsense(intr, sc_param, lun, ie, count, param)
406 register int intr;
407 register struct scsi *sc_param;
408 register int lun;
409 register int ie;
410 register int count;
411 register caddr_t param;
412 {
413 bzero(sc_param, sizeof(struct scsi));
414 sc_param->identify = MSG_IDENT | sc_disconnect | (lun & IDT_DRMASK);
415 sc_param->sc_lun = lun;
416
417 sc_param->sc_cpoint = (u_char *)param;
418 sc_param->sc_ctrnscnt = count;
419
420 /* sc_cdb */
421 sc_param->sc_opcode = SCOP_RSENSE;
422 sc_param->sc_count = count;
423
424 sc_go(intr, sc_param, ie, sc_param);
425 }
426 #endif
427
428 void
429 cxd1185_timeout(arg)
430 void *arg;
431 {
432 struct sc_scb *scb = arg;
433 struct scsipi_xfer *xs = scb->xs;
434 struct scsipi_link *sc_link = xs->sc_link;
435 int chan;
436
437 chan = sc_link->scsipi_scsi.target;
438
439 printf("sc: timeout ch=%d\n", chan);
440
441 /* XXX abort transfer and ... */
442 }
443