ebus.c revision 1.11 1 /* $NetBSD: ebus.c,v 1.11 2000/06/12 22:36:59 eeh 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 #include <vm/vm.h>
68 #include <vm/vm_kern.h>
69
70 #define _SPARC_BUS_DMA_PRIVATE
71 #include <machine/bus.h>
72 #include <machine/autoconf.h>
73
74 #include <dev/pci/pcivar.h>
75 #include <dev/pci/pcireg.h>
76 #include <dev/pci/pcidevs.h>
77
78 #include <sparc64/dev/iommureg.h>
79 #include <sparc64/dev/iommuvar.h>
80 #include <sparc64/dev/psychoreg.h>
81 #include <sparc64/dev/psychovar.h>
82 #include <sparc64/dev/ebusreg.h>
83 #include <sparc64/dev/ebusvar.h>
84 #include <sparc64/sparc64/cache.h>
85
86 int ebus_match __P((struct device *, struct cfdata *, void *));
87 void ebus_attach __P((struct device *, struct device *, void *));
88
89 struct cfattach ebus_ca = {
90 sizeof(struct ebus_softc), ebus_match, ebus_attach
91 };
92
93 int ebus_setup_attach_args __P((struct ebus_softc *, int,
94 struct ebus_attach_args *));
95 void ebus_destroy_attach_args __P((struct ebus_attach_args *));
96 int ebus_print __P((void *, const char *));
97 void ebus_find_ino __P((struct ebus_softc *, struct ebus_attach_args *));
98 int ebus_find_node __P((struct pci_attach_args *));
99
100 /*
101 * here are our bus space and bus dma routines.
102 */
103 static int ebus_bus_mmap __P((bus_space_tag_t, bus_type_t, bus_addr_t,
104 int, bus_space_handle_t *));
105 static int _ebus_bus_map __P((bus_space_tag_t, bus_type_t, bus_addr_t,
106 bus_size_t, int, vaddr_t,
107 bus_space_handle_t *));
108 static void *ebus_intr_establish __P((bus_space_tag_t, int, int,
109 int (*) __P((void *)), void *));
110
111 static int ebus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *,
112 bus_size_t, struct proc *, int));
113 static void ebus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t));
114 static void ebus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
115 bus_size_t, int));
116 int ebus_dmamem_alloc __P((bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t,
117 bus_dma_segment_t *, int, int *, int));
118 void ebus_dmamem_free __P((bus_dma_tag_t, bus_dma_segment_t *, int));
119 int ebus_dmamem_map __P((bus_dma_tag_t, bus_dma_segment_t *, int, size_t,
120 caddr_t *, int));
121 void ebus_dmamem_unmap __P((bus_dma_tag_t, caddr_t, size_t));
122
123 int
124 ebus_match(parent, match, aux)
125 struct device *parent;
126 struct cfdata *match;
127 void *aux;
128 {
129 struct pci_attach_args *pa = aux;
130
131 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
132 PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN &&
133 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS &&
134 ebus_find_node(pa))
135 return (1);
136
137 return (0);
138 }
139
140 /*
141 * attach an ebus and all it's children. this code is modeled
142 * after the sbus code which does similar things.
143 */
144 void
145 ebus_attach(parent, self, aux)
146 struct device *parent, *self;
147 void *aux;
148 {
149 struct ebus_softc *sc = (struct ebus_softc *)self;
150 struct pci_attach_args *pa = aux;
151 struct ebus_attach_args eba;
152 struct ebus_interrupt_map_mask *immp;
153 int node, nmapmask, rv;
154 char devinfo[256];
155
156 printf("\n");
157
158 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
159 printf("%s: %s, revision 0x%02x\n", self->dv_xname, devinfo,
160 PCI_REVISION(pa->pa_class));
161
162 sc->sc_parent = (struct psycho_softc *)parent;
163 sc->sc_bustag = pa->pa_memt;
164 sc->sc_childbustag = ebus_alloc_bus_tag(sc, PCI_MEMORY_BUS_SPACE);
165 sc->sc_dmatag = ebus_alloc_dma_tag(sc, pa->pa_dmat);
166
167 node = ebus_find_node(pa);
168 if (node == 0)
169 panic("could not find ebus node");
170
171 sc->sc_node = node;
172
173 /*
174 * fill in our softc with information from the prom
175 */
176 sc->sc_intmap = NULL;
177 sc->sc_range = NULL;
178 rv = getprop(node, "interrupt-map", sizeof(struct ebus_interrupt_map),
179 &sc->sc_nintmap, (void **)&sc->sc_intmap);
180 if (rv)
181 panic("could not get ebus interrupt-map");
182
183 immp = &sc->sc_intmapmask;
184 rv = getprop(node, "interrupt-map-mask",
185 sizeof(struct ebus_interrupt_map_mask), &nmapmask,
186 (void **)&immp);
187 if (rv)
188 panic("could not get ebus interrupt-map-mask");
189 if (nmapmask != 1)
190 panic("ebus interrupt-map-mask is broken");
191
192 rv = getprop(node, "ranges", sizeof(struct ebus_ranges),
193 &sc->sc_nrange, (void **)&sc->sc_range);
194 if (rv)
195 panic("could not get ebus ranges");
196
197 /*
198 * now attach all our children
199 */
200 DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node));
201 for (node = firstchild(node); node; node = nextsibling(node)) {
202 char *name = getpropstring(node, "name");
203
204 if (ebus_setup_attach_args(sc, node, &eba) != 0) {
205 printf("ebus_attach: %s: incomplete\n", name);
206 continue;
207 } else {
208 DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n", eba.ea_name));
209 (void)config_found(self, &eba, ebus_print);
210 }
211 ebus_destroy_attach_args(&eba);
212 }
213 }
214
215 int
216 ebus_setup_attach_args(sc, node, ea)
217 struct ebus_softc *sc;
218 int node;
219 struct ebus_attach_args *ea;
220 {
221 int n, rv;
222
223 bzero(ea, sizeof(struct ebus_attach_args));
224 rv = getprop(node, "name", 1, &n, (void **)&ea->ea_name);
225 if (rv != 0)
226 return (rv);
227 ea->ea_name[n] = '\0';
228
229 ea->ea_node = node;
230 ea->ea_bustag = sc->sc_childbustag;
231 ea->ea_dmatag = sc->sc_dmatag;
232
233 rv = getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nregs,
234 (void **)&ea->ea_regs);
235 if (rv)
236 return (rv);
237
238 rv = getprop(node, "address", sizeof(u_int32_t), &ea->ea_nvaddrs,
239 (void **)&ea->ea_vaddrs);
240 if (rv != ENOENT) {
241 if (rv)
242 return (rv);
243
244 if (ea->ea_nregs != ea->ea_nvaddrs)
245 printf("ebus loses: device %s: %d regs and %d addrs\n",
246 ea->ea_name, ea->ea_nregs, ea->ea_nvaddrs);
247 } else
248 ea->ea_nvaddrs = 0;
249
250 if (getprop(node, "interrupts", sizeof(u_int32_t), &ea->ea_nintrs,
251 (void **)&ea->ea_intrs))
252 ea->ea_nintrs = 0;
253 else
254 ebus_find_ino(sc, ea);
255
256 return (0);
257 }
258
259 void
260 ebus_destroy_attach_args(ea)
261 struct ebus_attach_args *ea;
262 {
263
264 if (ea->ea_name)
265 free((void *)ea->ea_name, M_DEVBUF);
266 if (ea->ea_regs)
267 free((void *)ea->ea_regs, M_DEVBUF);
268 if (ea->ea_intrs)
269 free((void *)ea->ea_intrs, M_DEVBUF);
270 if (ea->ea_vaddrs)
271 free((void *)ea->ea_vaddrs, M_DEVBUF);
272 }
273
274 int
275 ebus_print(aux, p)
276 void *aux;
277 const char *p;
278 {
279 struct ebus_attach_args *ea = aux;
280 int i;
281
282 if (p)
283 printf("%s at %s", ea->ea_name, p);
284 for (i = 0; i < ea->ea_nregs; i++)
285 printf(" addr %x-%x", ea->ea_regs[i].lo,
286 ea->ea_regs[i].lo + ea->ea_regs[i].size - 1);
287 for (i = 0; i < ea->ea_nintrs; i++)
288 printf(" ipl %d", ea->ea_intrs[i]);
289 return (UNCONF);
290 }
291
292 /*
293 * find the INO values for each interrupt and fill them in.
294 *
295 * for each "reg" property of this device, mask it's hi and lo
296 * values with the "interrupt-map-mask"'s hi/lo values, and also
297 * mask the interrupt number with the interrupt mask. search the
298 * "interrupt-map" list for matching values of hi, lo and interrupt
299 * to give the INO for this interrupt.
300 */
301 void
302 ebus_find_ino(sc, ea)
303 struct ebus_softc *sc;
304 struct ebus_attach_args *ea;
305 {
306 u_int32_t hi, lo, intr;
307 int i, j, k;
308
309 DPRINTF(EDB_INTRMAP, ("ebus_find_ino: searching %d interrupts", ea->ea_nintrs));
310 for (j = 0; j < ea->ea_nintrs; j++) {
311 intr = ea->ea_intrs[j] & sc->sc_intmapmask.intr;
312
313 DPRINTF(EDB_INTRMAP, ("; intr %x masked to %x", ea->ea_intrs[j], intr));
314 for (i = 0; i < ea->ea_nregs; i++) {
315 hi = ea->ea_regs[i].hi & sc->sc_intmapmask.hi;
316 lo = ea->ea_regs[i].lo & sc->sc_intmapmask.lo;
317
318 DPRINTF(EDB_INTRMAP, ("; reg hi.lo %08x.08x masked to %08x.%08x", ea->ea_regs[i].hi, ea->ea_regs[i].lo, hi, lo));
319 for (k = 0; k < sc->sc_nintmap; k++) {
320 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));
321 if (hi == sc->sc_intmap[k].hi &&
322 lo == sc->sc_intmap[k].lo &&
323 intr == sc->sc_intmap[k].intr) {
324 ea->ea_intrs[j] = sc->sc_intmap[k].cintr;
325 DPRINTF(EDB_INTRMAP, ("; FOUND IT! changing to %d\n", sc->sc_intmap[k].cintr));
326 goto next_intr;
327 }
328 }
329 }
330 next_intr:
331 }
332 }
333
334 /*
335 * what is our OFW node? this depends on our pci chipset tag
336 * having it's "node" value set to the OFW node of the PCI bus,
337 * see the simba driver.
338 */
339 int
340 ebus_find_node(pa)
341 struct pci_attach_args *pa;
342 {
343 int node = pa->pa_pc->node;
344 int n, *ap;
345 int pcibus, bus, dev, fn;
346
347 DPRINTF(EDB_PROM, ("ebus_find_node: looking at pci node %08x\n", node));
348 for (node = firstchild(node); node; node = nextsibling(node)) {
349 char *name = getpropstring(node, "name");
350
351 DPRINTF(EDB_PROM, ("ebus_find_node: looking at PCI device `%s', node = %08x\n", name, node));
352 /* must be "ebus" */
353 if (strcmp(name, "ebus") != 0)
354 continue;
355
356 /* pull the PCI bus out of the pa_tag */
357 pcibus = (pa->pa_tag >> 16) & 0xff;
358 DPRINTF(EDB_PROM, ("; pcibus %d dev %d fn %d\n", pcibus, pa->pa_device, pa->pa_function));
359
360 /* get the PCI bus/device/function for this node */
361 ap = NULL;
362 if (getprop(node, "reg", sizeof(int), &n,
363 (void **)&ap))
364 continue;
365
366 bus = (ap[0] >> 16) & 0xff;
367 dev = (ap[0] >> 11) & 0x1f;
368 fn = (ap[0] >> 8) & 0x7;
369
370 DPRINTF(EDB_PROM, ("; looking for bus %d dev %d fn %d\n", pcibus, pa->pa_device, pa->pa_function));
371 if (pa->pa_device != dev ||
372 pa->pa_function != fn ||
373 pcibus != bus)
374 continue;
375
376 DPRINTF(EDB_PROM, ("; found it, returning %08x\n", node));
377 /* found it! */
378 free(ap, M_DEVBUF);
379 return (node);
380 }
381
382 /* damn! */
383 return (0);
384 }
385
386 /*
387 * bus space and bus dma below here
388 */
389 bus_space_tag_t
390 ebus_alloc_bus_tag(sc, type)
391 struct ebus_softc *sc;
392 int type;
393 {
394 bus_space_tag_t bt;
395
396 bt = (bus_space_tag_t)
397 malloc(sizeof(struct sparc_bus_space_tag), M_DEVBUF, M_NOWAIT);
398 if (bt == NULL)
399 panic("could not allocate ebus bus tag");
400
401 bzero(bt, sizeof *bt);
402 bt->cookie = sc;
403 bt->parent = sc->sc_bustag;
404 bt->type = type;
405 bt->sparc_bus_map = _ebus_bus_map;
406 bt->sparc_bus_mmap = ebus_bus_mmap;
407 bt->sparc_intr_establish = ebus_intr_establish;
408 return (bt);
409 }
410
411 /* XXX? */
412 bus_dma_tag_t
413 ebus_alloc_dma_tag(sc, pdt)
414 struct ebus_softc *sc;
415 bus_dma_tag_t pdt;
416 {
417 bus_dma_tag_t dt;
418
419 dt = (bus_dma_tag_t)
420 malloc(sizeof(struct sparc_bus_dma_tag), M_DEVBUF, M_NOWAIT);
421 if (dt == NULL)
422 panic("could not allocate ebus dma tag");
423
424 bzero(dt, sizeof *dt);
425 dt->_cookie = sc;
426 dt->_parent = pdt;
427 #define PCOPY(x) dt->x = pdt->x
428 PCOPY(_dmamap_create);
429 PCOPY(_dmamap_destroy);
430 dt->_dmamap_load = ebus_dmamap_load;
431 PCOPY(_dmamap_load_mbuf);
432 PCOPY(_dmamap_load_uio);
433 PCOPY(_dmamap_load_raw);
434 dt->_dmamap_unload = ebus_dmamap_unload;
435 dt->_dmamap_sync = ebus_dmamap_sync;
436 dt->_dmamem_alloc = ebus_dmamem_alloc;
437 dt->_dmamem_free = ebus_dmamem_free;
438 dt->_dmamem_map = ebus_dmamem_map;
439 dt->_dmamem_unmap = ebus_dmamem_unmap;
440 PCOPY(_dmamem_mmap);
441 #undef PCOPY
442 return (dt);
443 }
444
445 /*
446 * bus space support. <sparc64/dev/psychoreg.h> has a discussion
447 * about PCI physical addresses, which also applies to ebus.
448 */
449 static int
450 _ebus_bus_map(t, btype, offset, size, flags, vaddr, hp)
451 bus_space_tag_t t;
452 bus_type_t btype;
453 bus_addr_t offset;
454 bus_size_t size;
455 int flags;
456 vaddr_t vaddr;
457 bus_space_handle_t *hp;
458 {
459 struct ebus_softc *sc = t->cookie;
460 bus_addr_t hi, lo;
461 int i;
462
463 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));
464
465 hi = offset >> 32UL;
466 lo = offset & 0xffffffff;
467 DPRINTF(EDB_BUSMAP, (" (hi %08x lo %08x)", (u_int)hi, (u_int)lo));
468 for (i = 0; i < sc->sc_nrange; i++) {
469 bus_addr_t pciaddr;
470
471 if (hi != sc->sc_range[i].child_hi)
472 continue;
473 if (lo < sc->sc_range[i].child_lo ||
474 (lo + size) > (sc->sc_range[i].child_lo + sc->sc_range[i].size))
475 continue;
476
477 pciaddr = ((bus_addr_t)sc->sc_range[i].phys_mid << 32UL) |
478 sc->sc_range[i].phys_lo;
479 pciaddr += lo;
480 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_map: mapping paddr offset %qx pciaddr %qx\n",
481 offset, pciaddr));
482 /* pass it onto the psycho */
483 return (bus_space_map2(sc->sc_bustag, t->type, pciaddr,
484 size, flags, vaddr, hp));
485 }
486 DPRINTF(EDB_BUSMAP, (": FAILED\n"));
487 return (EINVAL);
488 }
489
490 static int
491 ebus_bus_mmap(t, btype, paddr, flags, hp)
492 bus_space_tag_t t;
493 bus_type_t btype;
494 bus_addr_t paddr;
495 int flags;
496 bus_space_handle_t *hp;
497 {
498 bus_addr_t offset = paddr;
499 struct ebus_softc *sc = t->cookie;
500 int i;
501
502 for (i = 0; i < sc->sc_nrange; i++) {
503 bus_addr_t paddr = ((bus_addr_t)sc->sc_range[i].child_hi << 32) |
504 sc->sc_range[i].child_lo;
505
506 if (offset != paddr)
507 continue;
508
509 DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n", paddr));
510 return (bus_space_mmap(sc->sc_bustag, 0, paddr,
511 flags, hp));
512 }
513
514 return (-1);
515 }
516
517 /*
518 * install an interrupt handler for a PCI device
519 */
520 void *
521 ebus_intr_establish(t, level, flags, handler, arg)
522 bus_space_tag_t t;
523 int level;
524 int flags;
525 int (*handler) __P((void *));
526 void *arg;
527 {
528
529 /* XXX */
530 return (0);
531 }
532
533 /*
534 * bus dma support
535 */
536 int
537 ebus_dmamap_load(t, map, buf, buflen, p, flags)
538 bus_dma_tag_t t;
539 bus_dmamap_t map;
540 void *buf;
541 bus_size_t buflen;
542 struct proc *p;
543 int flags;
544 {
545 struct ebus_softc *sc = t->_cookie;
546
547 return (iommu_dvmamap_load(t, &sc->sc_parent->sc_is, map, buf, buflen,
548 p, flags));
549 }
550
551 void
552 ebus_dmamap_unload(t, map)
553 bus_dma_tag_t t;
554 bus_dmamap_t map;
555 {
556 struct ebus_softc *sc = t->_cookie;
557
558 iommu_dvmamap_unload(t, &sc->sc_parent->sc_is, map);
559 }
560
561 void
562 ebus_dmamap_sync(t, map, offset, len, ops)
563 bus_dma_tag_t t;
564 bus_dmamap_t map;
565 bus_addr_t offset;
566 bus_size_t len;
567 int ops;
568 {
569 struct ebus_softc *sc = t->_cookie;
570
571 iommu_dvmamap_sync(t, &sc->sc_parent->sc_is, map, offset, len, ops);
572 bus_dmamap_sync(t->_parent, map, offset, len, ops);
573 }
574
575 int
576 ebus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags)
577 bus_dma_tag_t t;
578 bus_size_t size;
579 bus_size_t alignment;
580 bus_size_t boundary;
581 bus_dma_segment_t *segs;
582 int nsegs;
583 int *rsegs;
584 int flags;
585 {
586 struct ebus_softc *sc = t->_cookie;
587
588 return (iommu_dvmamem_alloc(t, &sc->sc_parent->sc_is, size, alignment,
589 boundary, segs, nsegs, rsegs, flags));
590 }
591
592 void
593 ebus_dmamem_free(t, segs, nsegs)
594 bus_dma_tag_t t;
595 bus_dma_segment_t *segs;
596 int nsegs;
597 {
598 struct ebus_softc *sc = t->_cookie;
599
600 iommu_dvmamem_free(t, &sc->sc_parent->sc_is, segs, nsegs);
601 }
602
603 int
604 ebus_dmamem_map(t, segs, nsegs, size, kvap, flags)
605 bus_dma_tag_t t;
606 bus_dma_segment_t *segs;
607 int nsegs;
608 size_t size;
609 caddr_t *kvap;
610 int flags;
611 {
612 struct ebus_softc *sc = t->_cookie;
613
614 return (iommu_dvmamem_map(t, &sc->sc_parent->sc_is, segs, nsegs,
615 size, kvap, flags));
616 }
617
618 void
619 ebus_dmamem_unmap(t, kva, size)
620 bus_dma_tag_t t;
621 caddr_t kva;
622 size_t size;
623 {
624 struct ebus_softc *sc = t->_cookie;
625
626 iommu_dvmamem_unmap(t, &sc->sc_parent->sc_is, kva, size);
627 }
628