ebus.c revision 1.15 1 /* $NetBSD: ebus.c,v 1.15 2000/07/09 20:57:50 pk Exp $ */
2
3 /*
4 * Copyright (c) 1999, 2000 Matthew R. Green
5 * 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. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * 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
31 #include "opt_ddb.h"
32
33 /*
34 * UltraSPARC 5 and beyond ebus support.
35 *
36 * note that this driver is far from complete:
37 * - ebus2 dma code is completely unwritten
38 * - interrupt establish code is completely unwritten
39 * - bus map code is written and appears to work
40 */
41
42 #undef DEBUG
43 #define DEBUG
44
45 #ifdef DEBUG
46 #define EDB_PROM 0x01
47 #define EDB_CHILD 0x02
48 #define EDB_INTRMAP 0x04
49 #define EDB_BUSMAP 0x08
50 #define EDB_BUSDMA 0x10
51 #define EDB_INTR 0x20
52 int ebus_debug = 0;
53 #define DPRINTF(l, s) do { if (ebus_debug & l) printf s; } while (0)
54 #else
55 #define DPRINTF(l, s)
56 #endif
57
58 #include <sys/param.h>
59 #include <sys/conf.h>
60 #include <sys/device.h>
61 #include <sys/errno.h>
62 #include <sys/extent.h>
63 #include <sys/malloc.h>
64 #include <sys/systm.h>
65 #include <sys/time.h>
66
67 #define _SPARC_BUS_DMA_PRIVATE
68 #include <machine/bus.h>
69 #include <machine/autoconf.h>
70
71 #include <dev/pci/pcivar.h>
72 #include <dev/pci/pcireg.h>
73 #include <dev/pci/pcidevs.h>
74
75 #include <sparc64/dev/iommureg.h>
76 #include <sparc64/dev/iommuvar.h>
77 #include <sparc64/dev/psychoreg.h>
78 #include <sparc64/dev/psychovar.h>
79 #include <sparc64/dev/ebusreg.h>
80 #include <sparc64/dev/ebusvar.h>
81 #include <sparc64/sparc64/cache.h>
82
83 int ebus_match __P((struct device *, struct cfdata *, void *));
84 void ebus_attach __P((struct device *, struct device *, void *));
85
86 struct cfattach ebus_ca = {
87 sizeof(struct ebus_softc), ebus_match, ebus_attach
88 };
89
90 int ebus_setup_attach_args __P((struct ebus_softc *, int,
91 struct ebus_attach_args *));
92 void ebus_destroy_attach_args __P((struct ebus_attach_args *));
93 int ebus_print __P((void *, const char *));
94 void ebus_find_ino __P((struct ebus_softc *, struct ebus_attach_args *));
95 int ebus_find_node __P((struct pci_attach_args *));
96
97 /*
98 * here are our bus space and bus dma routines.
99 */
100 static int ebus_bus_mmap __P((bus_space_tag_t, bus_type_t, bus_addr_t,
101 int, bus_space_handle_t *));
102 static int _ebus_bus_map __P((bus_space_tag_t, bus_type_t, bus_addr_t,
103 bus_size_t, int, vaddr_t,
104 bus_space_handle_t *));
105 static void *ebus_intr_establish __P((bus_space_tag_t, int, int, int,
106 int (*) __P((void *)), void *));
107
108 static int ebus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *,
109 bus_size_t, struct proc *, int));
110 static void ebus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t));
111 static void ebus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
112 bus_size_t, int));
113 int ebus_dmamem_alloc __P((bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t,
114 bus_dma_segment_t *, int, int *, int));
115 void ebus_dmamem_free __P((bus_dma_tag_t, bus_dma_segment_t *, int));
116 int ebus_dmamem_map __P((bus_dma_tag_t, bus_dma_segment_t *, int, size_t,
117 caddr_t *, int));
118 void ebus_dmamem_unmap __P((bus_dma_tag_t, caddr_t, size_t));
119
120 int
121 ebus_match(parent, match, aux)
122 struct device *parent;
123 struct cfdata *match;
124 void *aux;
125 {
126 struct pci_attach_args *pa = aux;
127
128 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
129 PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN &&
130 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS &&
131 ebus_find_node(pa))
132 return (1);
133
134 return (0);
135 }
136
137 /*
138 * attach an ebus and all it's children. this code is modeled
139 * after the sbus code which does similar things.
140 */
141 void
142 ebus_attach(parent, self, aux)
143 struct device *parent, *self;
144 void *aux;
145 {
146 struct ebus_softc *sc = (struct ebus_softc *)self;
147 struct pci_attach_args *pa = aux;
148 struct ebus_attach_args eba;
149 struct ebus_interrupt_map_mask *immp;
150 int node, nmapmask, rv;
151 char devinfo[256];
152
153 printf("\n");
154
155 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
156 printf("%s: %s, revision 0x%02x\n", self->dv_xname, devinfo,
157 PCI_REVISION(pa->pa_class));
158
159 sc->sc_parent = (struct psycho_softc *)parent;
160 sc->sc_bustag = pa->pa_memt;
161 sc->sc_childbustag = ebus_alloc_bus_tag(sc, PCI_MEMORY_BUS_SPACE);
162 sc->sc_dmatag = ebus_alloc_dma_tag(sc, pa->pa_dmat);
163
164 node = ebus_find_node(pa);
165 if (node == 0)
166 panic("could not find ebus node");
167
168 sc->sc_node = node;
169
170 /*
171 * fill in our softc with information from the prom
172 */
173 sc->sc_intmap = NULL;
174 sc->sc_range = NULL;
175 rv = getprop(node, "interrupt-map", sizeof(struct ebus_interrupt_map),
176 &sc->sc_nintmap, (void **)&sc->sc_intmap);
177 if (rv)
178 panic("could not get ebus interrupt-map");
179
180 immp = &sc->sc_intmapmask;
181 rv = getprop(node, "interrupt-map-mask",
182 sizeof(struct ebus_interrupt_map_mask), &nmapmask,
183 (void **)&immp);
184 if (rv)
185 panic("could not get ebus interrupt-map-mask");
186 if (nmapmask != 1)
187 panic("ebus interrupt-map-mask is broken");
188
189 rv = getprop(node, "ranges", sizeof(struct ebus_ranges),
190 &sc->sc_nrange, (void **)&sc->sc_range);
191 if (rv)
192 panic("could not get ebus ranges");
193
194 /*
195 * now attach all our children
196 */
197 DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node));
198 for (node = firstchild(node); node; node = nextsibling(node)) {
199 char *name = getpropstring(node, "name");
200
201 if (ebus_setup_attach_args(sc, node, &eba) != 0) {
202 printf("ebus_attach: %s: incomplete\n", name);
203 continue;
204 } else {
205 DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n", eba.ea_name));
206 (void)config_found(self, &eba, ebus_print);
207 }
208 ebus_destroy_attach_args(&eba);
209 }
210 }
211
212 int
213 ebus_setup_attach_args(sc, node, ea)
214 struct ebus_softc *sc;
215 int node;
216 struct ebus_attach_args *ea;
217 {
218 int n, rv;
219
220 bzero(ea, sizeof(struct ebus_attach_args));
221 rv = getprop(node, "name", 1, &n, (void **)&ea->ea_name);
222 if (rv != 0)
223 return (rv);
224 ea->ea_name[n] = '\0';
225
226 ea->ea_node = node;
227 ea->ea_bustag = sc->sc_childbustag;
228 ea->ea_dmatag = sc->sc_dmatag;
229
230 rv = getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nregs,
231 (void **)&ea->ea_regs);
232 if (rv)
233 return (rv);
234
235 rv = getprop(node, "address", sizeof(u_int32_t), &ea->ea_nvaddrs,
236 (void **)&ea->ea_vaddrs);
237 if (rv != ENOENT) {
238 if (rv)
239 return (rv);
240
241 if (ea->ea_nregs != ea->ea_nvaddrs)
242 printf("ebus loses: device %s: %d regs and %d addrs\n",
243 ea->ea_name, ea->ea_nregs, ea->ea_nvaddrs);
244 } else
245 ea->ea_nvaddrs = 0;
246
247 if (getprop(node, "interrupts", sizeof(u_int32_t), &ea->ea_nintrs,
248 (void **)&ea->ea_intrs))
249 ea->ea_nintrs = 0;
250 else
251 ebus_find_ino(sc, ea);
252
253 return (0);
254 }
255
256 void
257 ebus_destroy_attach_args(ea)
258 struct ebus_attach_args *ea;
259 {
260
261 if (ea->ea_name)
262 free((void *)ea->ea_name, M_DEVBUF);
263 if (ea->ea_regs)
264 free((void *)ea->ea_regs, M_DEVBUF);
265 if (ea->ea_intrs)
266 free((void *)ea->ea_intrs, M_DEVBUF);
267 if (ea->ea_vaddrs)
268 free((void *)ea->ea_vaddrs, M_DEVBUF);
269 }
270
271 int
272 ebus_print(aux, p)
273 void *aux;
274 const char *p;
275 {
276 struct ebus_attach_args *ea = aux;
277 int i;
278
279 if (p)
280 printf("%s at %s", ea->ea_name, p);
281 for (i = 0; i < ea->ea_nregs; i++)
282 printf(" addr %x-%x", ea->ea_regs[i].lo,
283 ea->ea_regs[i].lo + ea->ea_regs[i].size - 1);
284 for (i = 0; i < ea->ea_nintrs; i++)
285 printf(" ipl %d", ea->ea_intrs[i]);
286 return (UNCONF);
287 }
288
289 /*
290 * find the INO values for each interrupt and fill them in.
291 *
292 * for each "reg" property of this device, mask it's hi and lo
293 * values with the "interrupt-map-mask"'s hi/lo values, and also
294 * mask the interrupt number with the interrupt mask. search the
295 * "interrupt-map" list for matching values of hi, lo and interrupt
296 * to give the INO for this interrupt.
297 */
298 void
299 ebus_find_ino(sc, ea)
300 struct ebus_softc *sc;
301 struct ebus_attach_args *ea;
302 {
303 u_int32_t hi, lo, intr;
304 int i, j, k;
305
306 DPRINTF(EDB_INTRMAP, ("ebus_find_ino: searching %d interrupts", ea->ea_nintrs));
307 for (j = 0; j < ea->ea_nintrs; j++) {
308 intr = ea->ea_intrs[j] & sc->sc_intmapmask.intr;
309
310 DPRINTF(EDB_INTRMAP, ("; intr %x masked to %x", ea->ea_intrs[j], intr));
311 for (i = 0; i < ea->ea_nregs; i++) {
312 hi = ea->ea_regs[i].hi & sc->sc_intmapmask.hi;
313 lo = ea->ea_regs[i].lo & sc->sc_intmapmask.lo;
314
315 DPRINTF(EDB_INTRMAP, ("; reg hi.lo %08x.08x masked to %08x.%08x", ea->ea_regs[i].hi, ea->ea_regs[i].lo, hi, lo));
316 for (k = 0; k < sc->sc_nintmap; k++) {
317 DPRINTF(EDB_INTRMAP, ("; checking hi.lo %08x.%08x intr %x", sc->sc_intmap[k].hi, sc->sc_intmap[k].lo, sc->sc_intmap[k].intr));
318 if (hi == sc->sc_intmap[k].hi &&
319 lo == sc->sc_intmap[k].lo &&
320 intr == sc->sc_intmap[k].intr) {
321 ea->ea_intrs[j] =
322 sc->sc_intmap[k].cintr|INTMAP_OBIO;
323 DPRINTF(EDB_INTRMAP, ("; FOUND IT! changing to %d\n", sc->sc_intmap[k].cintr));
324 goto next_intr;
325 }
326 }
327 }
328 next_intr:
329 }
330 }
331
332 /*
333 * what is our OFW node? this depends on our pci chipset tag
334 * having it's "node" value set to the OFW node of the PCI bus,
335 * see the simba driver.
336 */
337 int
338 ebus_find_node(pa)
339 struct pci_attach_args *pa;
340 {
341 int node = pa->pa_pc->node;
342 int n, *ap;
343 int pcibus, bus, dev, fn;
344
345 DPRINTF(EDB_PROM, ("ebus_find_node: looking at pci node %08x\n", node));
346 for (node = firstchild(node); node; node = nextsibling(node)) {
347 char *name = getpropstring(node, "name");
348
349 DPRINTF(EDB_PROM, ("ebus_find_node: looking at PCI device `%s', node = %08x\n", name, node));
350 /* must be "ebus" */
351 if (strcmp(name, "ebus") != 0)
352 continue;
353
354 /* pull the PCI bus out of the pa_tag */
355 pcibus = (pa->pa_tag >> 16) & 0xff;
356 DPRINTF(EDB_PROM, ("; pcibus %d dev %d fn %d\n", pcibus, pa->pa_device, pa->pa_function));
357
358 /* get the PCI bus/device/function for this node */
359 ap = NULL;
360 if (getprop(node, "reg", sizeof(int), &n,
361 (void **)&ap))
362 continue;
363
364 bus = (ap[0] >> 16) & 0xff;
365 dev = (ap[0] >> 11) & 0x1f;
366 fn = (ap[0] >> 8) & 0x7;
367
368 DPRINTF(EDB_PROM, ("; looking for bus %d dev %d fn %d\n", pcibus, pa->pa_device, pa->pa_function));
369 if (pa->pa_device != dev ||
370 pa->pa_function != fn ||
371 pcibus != bus)
372 continue;
373
374 DPRINTF(EDB_PROM, ("; found it, returning %08x\n", node));
375 /* found it! */
376 free(ap, M_DEVBUF);
377 return (node);
378 }
379
380 /* damn! */
381 return (0);
382 }
383
384 /*
385 * bus space and bus dma below here
386 */
387 bus_space_tag_t
388 ebus_alloc_bus_tag(sc, type)
389 struct ebus_softc *sc;
390 int type;
391 {
392 bus_space_tag_t bt;
393
394 bt = (bus_space_tag_t)
395 malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT);
396 if (bt == NULL)
397 panic("could not allocate ebus bus tag");
398
399 bzero(bt, sizeof *bt);
400 bt->cookie = sc;
401 bt->parent = sc->sc_bustag;
402 bt->type = type;
403 bt->sparc_bus_map = _ebus_bus_map;
404 bt->sparc_bus_mmap = ebus_bus_mmap;
405 bt->sparc_intr_establish = ebus_intr_establish;
406 return (bt);
407 }
408
409 /* XXX? */
410 bus_dma_tag_t
411 ebus_alloc_dma_tag(sc, pdt)
412 struct ebus_softc *sc;
413 bus_dma_tag_t pdt;
414 {
415 bus_dma_tag_t dt;
416
417 dt = (bus_dma_tag_t)
418 malloc(sizeof(struct sparc_bus_dma_tag), M_DEVBUF, M_NOWAIT);
419 if (dt == NULL)
420 panic("could not allocate ebus dma tag");
421
422 bzero(dt, sizeof *dt);
423 dt->_cookie = sc;
424 dt->_parent = pdt;
425 #define PCOPY(x) dt->x = pdt->x
426 PCOPY(_dmamap_create);
427 PCOPY(_dmamap_destroy);
428 dt->_dmamap_load = ebus_dmamap_load;
429 PCOPY(_dmamap_load_mbuf);
430 PCOPY(_dmamap_load_uio);
431 PCOPY(_dmamap_load_raw);
432 dt->_dmamap_unload = ebus_dmamap_unload;
433 dt->_dmamap_sync = ebus_dmamap_sync;
434 dt->_dmamem_alloc = ebus_dmamem_alloc;
435 dt->_dmamem_free = ebus_dmamem_free;
436 dt->_dmamem_map = ebus_dmamem_map;
437 dt->_dmamem_unmap = ebus_dmamem_unmap;
438 PCOPY(_dmamem_mmap);
439 #undef PCOPY
440 return (dt);
441 }
442
443 /*
444 * bus space support. <sparc64/dev/psychoreg.h> has a discussion
445 * about PCI physical addresses, which also applies to ebus.
446 */
447 static int
448 _ebus_bus_map(t, btype, offset, size, flags, vaddr, hp)
449 bus_space_tag_t t;
450 bus_type_t btype;
451 bus_addr_t offset;
452 bus_size_t size;
453 int flags;
454 vaddr_t vaddr;
455 bus_space_handle_t *hp;
456 {
457 struct ebus_softc *sc = t->cookie;
458 bus_addr_t hi, lo;
459 int i;
460
461 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_map: type %d off %016llx sz %x flags %d va %p", (int)t->type, (u_int64_t)offset, (int)size, (int)flags, vaddr));
462
463 hi = offset >> 32UL;
464 lo = offset & 0xffffffff;
465 DPRINTF(EDB_BUSMAP, (" (hi %08x lo %08x)", (u_int)hi, (u_int)lo));
466 for (i = 0; i < sc->sc_nrange; i++) {
467 bus_addr_t pciaddr;
468
469 if (hi != sc->sc_range[i].child_hi)
470 continue;
471 if (lo < sc->sc_range[i].child_lo ||
472 (lo + size) > (sc->sc_range[i].child_lo + sc->sc_range[i].size))
473 continue;
474
475 pciaddr = ((bus_addr_t)sc->sc_range[i].phys_mid << 32UL) |
476 sc->sc_range[i].phys_lo;
477 pciaddr += lo;
478 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_map: mapping paddr offset %qx pciaddr %qx\n",
479 offset, pciaddr));
480 /* pass it onto the psycho */
481 return (bus_space_map2(sc->sc_bustag, t->type, pciaddr,
482 size, flags, vaddr, hp));
483 }
484 DPRINTF(EDB_BUSMAP, (": FAILED\n"));
485 return (EINVAL);
486 }
487
488 static int
489 ebus_bus_mmap(t, btype, paddr, flags, hp)
490 bus_space_tag_t t;
491 bus_type_t btype;
492 bus_addr_t paddr;
493 int flags;
494 bus_space_handle_t *hp;
495 {
496 bus_addr_t offset = paddr;
497 struct ebus_softc *sc = t->cookie;
498 int i;
499
500 for (i = 0; i < sc->sc_nrange; i++) {
501 bus_addr_t paddr = ((bus_addr_t)sc->sc_range[i].child_hi << 32) |
502 sc->sc_range[i].child_lo;
503
504 if (offset != paddr)
505 continue;
506
507 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n", paddr));
508 return (bus_space_mmap(sc->sc_bustag, 0, paddr,
509 flags, hp));
510 }
511
512 return (-1);
513 }
514
515 /*
516 * install an interrupt handler for a PCI device
517 */
518 void *
519 ebus_intr_establish(t, pri, level, flags, handler, arg)
520 bus_space_tag_t t;
521 int pri;
522 int level;
523 int flags;
524 int (*handler) __P((void *));
525 void *arg;
526 {
527 return (bus_intr_establish(t->parent, pri, level, flags, handler, arg));
528 }
529
530 /*
531 * bus dma support
532 */
533 int
534 ebus_dmamap_load(t, map, buf, buflen, p, flags)
535 bus_dma_tag_t t;
536 bus_dmamap_t map;
537 void *buf;
538 bus_size_t buflen;
539 struct proc *p;
540 int flags;
541 {
542 struct ebus_softc *sc = t->_cookie;
543
544 return (iommu_dvmamap_load(t, &sc->sc_parent->sc_is, map, buf, buflen,
545 p, flags));
546 }
547
548 void
549 ebus_dmamap_unload(t, map)
550 bus_dma_tag_t t;
551 bus_dmamap_t map;
552 {
553 struct ebus_softc *sc = t->_cookie;
554
555 iommu_dvmamap_unload(t, &sc->sc_parent->sc_is, map);
556 }
557
558 void
559 ebus_dmamap_sync(t, map, offset, len, ops)
560 bus_dma_tag_t t;
561 bus_dmamap_t map;
562 bus_addr_t offset;
563 bus_size_t len;
564 int ops;
565 {
566 struct ebus_softc *sc = t->_cookie;
567
568 iommu_dvmamap_sync(t, &sc->sc_parent->sc_is, map, offset, len, ops);
569 bus_dmamap_sync(t->_parent, map, offset, len, ops);
570 }
571
572 int
573 ebus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags)
574 bus_dma_tag_t t;
575 bus_size_t size;
576 bus_size_t alignment;
577 bus_size_t boundary;
578 bus_dma_segment_t *segs;
579 int nsegs;
580 int *rsegs;
581 int flags;
582 {
583 struct ebus_softc *sc = t->_cookie;
584
585 return (iommu_dvmamem_alloc(t, &sc->sc_parent->sc_is, size, alignment,
586 boundary, segs, nsegs, rsegs, flags));
587 }
588
589 void
590 ebus_dmamem_free(t, segs, nsegs)
591 bus_dma_tag_t t;
592 bus_dma_segment_t *segs;
593 int nsegs;
594 {
595 struct ebus_softc *sc = t->_cookie;
596
597 iommu_dvmamem_free(t, &sc->sc_parent->sc_is, segs, nsegs);
598 }
599
600 int
601 ebus_dmamem_map(t, segs, nsegs, size, kvap, flags)
602 bus_dma_tag_t t;
603 bus_dma_segment_t *segs;
604 int nsegs;
605 size_t size;
606 caddr_t *kvap;
607 int flags;
608 {
609 struct ebus_softc *sc = t->_cookie;
610
611 return (iommu_dvmamem_map(t, &sc->sc_parent->sc_is, segs, nsegs,
612 size, kvap, flags));
613 }
614
615 void
616 ebus_dmamem_unmap(t, kva, size)
617 bus_dma_tag_t t;
618 caddr_t kva;
619 size_t size;
620 {
621 struct ebus_softc *sc = t->_cookie;
622
623 iommu_dvmamem_unmap(t, &sc->sc_parent->sc_is, kva, size);
624 }
625