Annotation of sys/arch/sparc64/dev/ebus.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ebus.c,v 1.17 2007/04/10 17:47:55 miod Exp $ */
2: /* $NetBSD: ebus.c,v 1.24 2001/07/25 03:49:54 eeh Exp $ */
3:
4: /*
5: * Copyright (c) 1999, 2000 Matthew R. Green
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. The name of the author may not be used to endorse or promote products
17: * derived from this software without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24: * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26: * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: /*
33: * UltraSPARC 5 and beyond ebus support.
34: *
35: * note that this driver is not complete:
36: * - ebus2 dma code is completely unwritten
37: * - interrupt establish is written and appears to work
38: * - bus map code is written and appears to work
39: */
40:
41: #ifdef DEBUG
42: #define EDB_PROM 0x01
43: #define EDB_CHILD 0x02
44: #define EDB_INTRMAP 0x04
45: #define EDB_BUSMAP 0x08
46: #define EDB_BUSDMA 0x10
47: #define EDB_INTR 0x20
48: int ebus_debug = 0x0;
49: #define DPRINTF(l, s) do { if (ebus_debug & l) printf s; } while (0)
50: #else
51: #define DPRINTF(l, s)
52: #endif
53:
54: #include <sys/param.h>
55: #include <sys/conf.h>
56: #include <sys/device.h>
57: #include <sys/errno.h>
58: #include <sys/extent.h>
59: #include <sys/malloc.h>
60: #include <sys/systm.h>
61: #include <sys/time.h>
62:
63: #define _SPARC_BUS_DMA_PRIVATE
64: #include <machine/bus.h>
65: #include <machine/autoconf.h>
66: #include <machine/openfirm.h>
67:
68: #include <dev/pci/pcivar.h>
69: #include <dev/pci/pcireg.h>
70: #include <dev/pci/pcidevs.h>
71:
72: #include <sparc64/dev/iommureg.h>
73: #include <sparc64/dev/iommuvar.h>
74: #include <sparc64/dev/psychoreg.h>
75: #include <sparc64/dev/psychovar.h>
76: #include <sparc64/dev/ebusreg.h>
77: #include <sparc64/dev/ebusvar.h>
78: #include <sparc64/sparc64/cache.h>
79:
80: int ebus_match(struct device *, void *, void *);
81: void ebus_attach(struct device *, struct device *, void *);
82:
83: struct cfattach ebus_ca = {
84: sizeof(struct ebus_softc), ebus_match, ebus_attach
85: };
86:
87: struct cfdriver ebus_cd = {
88: NULL, "ebus", DV_DULL
89: };
90:
91:
92: void ebus_find_ino(struct ebus_softc *, struct ebus_attach_args *);
93: int ebus_find_node(struct pci_attach_args *);
94:
95: /*
96: * here are our bus space and bus dma routines.
97: */
98: static paddr_t ebus_bus_mmap(bus_space_tag_t, bus_space_tag_t, bus_addr_t,
99: off_t, int, int);
100: static int _ebus_bus_map(bus_space_tag_t, bus_space_tag_t, bus_addr_t,
101: bus_size_t, int, bus_space_handle_t *);
102: bus_space_tag_t ebus_alloc_mem_tag(struct ebus_softc *, bus_space_tag_t);
103: bus_space_tag_t ebus_alloc_io_tag(struct ebus_softc *, bus_space_tag_t);
104: bus_space_tag_t _ebus_alloc_bus_tag(struct ebus_softc *sc, const char *,
105: bus_space_tag_t, int);
106:
107:
108: int
109: ebus_match(struct device *parent, void *match, void *aux)
110: {
111: struct pci_attach_args *pa = aux;
112: char name[10];
113: int node;
114:
115: /* Only attach if there's a PROM node. */
116: node = PCITAG_NODE(pa->pa_tag);
117: if (node == -1) return (0);
118:
119: /* Match a real ebus */
120: OF_getprop(node, "name", &name, sizeof(name));
121: if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
122: PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN &&
123: PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_EBUS &&
124: strcmp(name, "ebus") == 0)
125: return (1);
126:
127: /* Or a real RIO ebus */
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_RIO_EBUS &&
131: strcmp(name, "ebus") == 0)
132: return (1);
133:
134: /* Or a PCI-ISA bridge XXX I hope this is on-board. */
135: if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
136: PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) {
137: return (1);
138: }
139:
140: return (0);
141: }
142:
143: /*
144: * attach an ebus and all its children. this code is modeled
145: * after the sbus code which does similar things.
146: */
147: void
148: ebus_attach(struct device *parent, struct device *self, void *aux)
149: {
150: struct ebus_softc *sc = (struct ebus_softc *)self;
151: struct pci_attach_args *pa = aux;
152: struct ebus_attach_args eba;
153: struct ebus_interrupt_map_mask *immp;
154: int node, nmapmask, error;
155:
156: printf("\n");
157:
158: sc->sc_memtag = ebus_alloc_mem_tag(sc, pa->pa_memt);
159: sc->sc_iotag = ebus_alloc_io_tag(sc, pa->pa_iot);
160: sc->sc_dmatag = ebus_alloc_dma_tag(sc, pa->pa_dmat);
161:
162: node = PCITAG_NODE(pa->pa_tag);
163: if (node == -1)
164: panic("could not find ebus node");
165:
166: sc->sc_node = node;
167:
168: /*
169: * fill in our softc with information from the prom
170: */
171: sc->sc_intmap = NULL;
172: sc->sc_range = NULL;
173: error = getprop(node, "interrupt-map",
174: sizeof(struct ebus_interrupt_map),
175: &sc->sc_nintmap, (void **)&sc->sc_intmap);
176: switch (error) {
177: case 0:
178: immp = &sc->sc_intmapmask;
179: error = getprop(node, "interrupt-map-mask",
180: sizeof(struct ebus_interrupt_map_mask), &nmapmask,
181: (void **)&immp);
182: if (error)
183: panic("could not get ebus interrupt-map-mask");
184: if (nmapmask != 1)
185: panic("ebus interrupt-map-mask is broken");
186: break;
187: case ENOENT:
188: break;
189: default:
190: panic("ebus interrupt-map: error %d", error);
191: break;
192: }
193:
194: error = getprop(node, "ranges", sizeof(struct ebus_ranges),
195: &sc->sc_nrange, &sc->sc_range);
196: if (error)
197: panic("ebus ranges: error %d", error);
198:
199: /*
200: * now attach all our children
201: */
202: DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node));
203: for (node = firstchild(node); node; node = nextsibling(node)) {
204: if (ebus_setup_attach_args(sc, node, &eba) != 0) {
205: DPRINTF(EDB_CHILD,
206: ("ebus_attach: %s: incomplete\n",
207: getpropstring(node, "name")));
208: continue;
209: } else {
210: DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n",
211: eba.ea_name));
212: (void)config_found(self, &eba, ebus_print);
213: }
214: ebus_destroy_attach_args(&eba);
215: }
216: }
217:
218: int
219: ebus_setup_attach_args(struct ebus_softc *sc, int node,
220: struct ebus_attach_args *ea)
221: {
222: int n, rv;
223:
224: bzero(ea, sizeof(struct ebus_attach_args));
225: rv = getprop(node, "name", 1, &n, (void **)&ea->ea_name);
226: if (rv != 0)
227: return (rv);
228: ea->ea_name[n] = '\0';
229:
230: ea->ea_node = node;
231: ea->ea_memtag = sc->sc_memtag;
232: ea->ea_iotag = sc->sc_iotag;
233: ea->ea_dmatag = sc->sc_dmatag;
234:
235: rv = getprop(node, "reg", sizeof(struct ebus_regs), &ea->ea_nregs,
236: (void **)&ea->ea_regs);
237: if (rv)
238: return (rv);
239:
240: rv = getprop(node, "address", sizeof(u_int32_t), &ea->ea_nvaddrs,
241: (void **)&ea->ea_vaddrs);
242: if (rv != ENOENT) {
243: if (rv)
244: return (rv);
245:
246: if (ea->ea_nregs != ea->ea_nvaddrs)
247: printf("ebus loses: device %s: %d regs and %d addrs\n",
248: ea->ea_name, ea->ea_nregs, ea->ea_nvaddrs);
249: } else
250: ea->ea_nvaddrs = 0;
251:
252: if (getprop(node, "interrupts", sizeof(u_int32_t), &ea->ea_nintrs,
253: (void **)&ea->ea_intrs))
254: ea->ea_nintrs = 0;
255: else
256: ebus_find_ino(sc, ea);
257:
258: return (0);
259: }
260:
261: void
262: ebus_destroy_attach_args(struct ebus_attach_args *ea)
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(void *aux, const char *p)
276: {
277: struct ebus_attach_args *ea = aux;
278: int i;
279:
280: if (p)
281: printf("\"%s\" at %s", ea->ea_name, p);
282: for (i = 0; i < ea->ea_nregs; i++)
283: printf("%s %x-%x", i == 0 ? " addr" : ",",
284: ea->ea_regs[i].lo,
285: ea->ea_regs[i].lo + ea->ea_regs[i].size - 1);
286: for (i = 0; i < ea->ea_nintrs; i++)
287: printf(" ipl %d", ea->ea_intrs[i]);
288: return (UNCONF);
289: }
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 its 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(struct ebus_softc *sc, struct ebus_attach_args *ea)
303: {
304: u_int32_t hi, lo, intr;
305: int i, j, k;
306:
307: if (sc->sc_nintmap == 0) {
308: for (i = 0; i < ea->ea_nintrs; i++) {
309: OF_mapintr(ea->ea_node, &ea->ea_intrs[i],
310: sizeof(ea->ea_intrs[0]),
311: sizeof(ea->ea_intrs[0]));
312: }
313: return;
314: }
315:
316: DPRINTF(EDB_INTRMAP,
317: ("ebus_find_ino: searching %d interrupts", ea->ea_nintrs));
318:
319: for (j = 0; j < ea->ea_nintrs; j++) {
320:
321: intr = ea->ea_intrs[j] & sc->sc_intmapmask.intr;
322:
323: DPRINTF(EDB_INTRMAP,
324: ("; intr %x masked to %x", ea->ea_intrs[j], intr));
325: for (i = 0; i < ea->ea_nregs; i++) {
326: hi = ea->ea_regs[i].hi & sc->sc_intmapmask.hi;
327: lo = ea->ea_regs[i].lo & sc->sc_intmapmask.lo;
328:
329: DPRINTF(EDB_INTRMAP,
330: ("; reg hi.lo %08x.%08x masked to %08x.%08x",
331: ea->ea_regs[i].hi, ea->ea_regs[i].lo, hi, lo));
332: for (k = 0; k < sc->sc_nintmap; k++) {
333: DPRINTF(EDB_INTRMAP,
334: ("; checking hi.lo %08x.%08x intr %x",
335: sc->sc_intmap[k].hi, sc->sc_intmap[k].lo,
336: sc->sc_intmap[k].intr));
337: if (hi == sc->sc_intmap[k].hi &&
338: lo == sc->sc_intmap[k].lo &&
339: intr == sc->sc_intmap[k].intr) {
340: ea->ea_intrs[j] =
341: sc->sc_intmap[k].cintr;
342: DPRINTF(EDB_INTRMAP,
343: ("; FOUND IT! changing to %d\n",
344: sc->sc_intmap[k].cintr));
345: goto next_intr;
346: }
347: }
348: }
349: next_intr:;
350: }
351: }
352:
353: bus_space_tag_t
354: ebus_alloc_mem_tag(struct ebus_softc *sc, bus_space_tag_t parent)
355: {
356: return (_ebus_alloc_bus_tag(sc, "mem", parent,
357: 0x02)); /* 32-bit mem space (where's the #define???) */
358: }
359:
360: bus_space_tag_t
361: ebus_alloc_io_tag(struct ebus_softc *sc, bus_space_tag_t parent)
362: {
363: return (_ebus_alloc_bus_tag(sc, "io", parent,
364: 0x01)); /* IO space (where's the #define???) */
365: }
366:
367: /*
368: * bus space and bus dma below here
369: */
370: bus_space_tag_t
371: _ebus_alloc_bus_tag(struct ebus_softc *sc, const char *name,
372: bus_space_tag_t parent, int ss)
373: {
374: struct sparc_bus_space_tag *bt;
375:
376: bt = malloc(sizeof(*bt), M_DEVBUF, M_NOWAIT);
377: if (bt == NULL)
378: panic("could not allocate ebus bus tag");
379:
380: bzero(bt, sizeof *bt);
381: snprintf(bt->name, sizeof(bt->name), "%s_%s",
382: sc->sc_dev.dv_xname, name);
383: bt->cookie = sc;
384: bt->parent = parent;
385: bt->default_type = ss;
386: bt->asi = parent->asi;
387: bt->sasi = parent->sasi;
388: bt->sparc_bus_map = _ebus_bus_map;
389: bt->sparc_bus_mmap = ebus_bus_mmap;
390:
391: return (bt);
392: }
393:
394: bus_dma_tag_t
395: ebus_alloc_dma_tag(struct ebus_softc *sc, bus_dma_tag_t pdt)
396: {
397: bus_dma_tag_t dt;
398:
399: dt = (bus_dma_tag_t)
400: malloc(sizeof(struct sparc_bus_dma_tag), M_DEVBUF, M_NOWAIT);
401: if (dt == NULL)
402: panic("could not allocate ebus dma tag");
403:
404: bzero(dt, sizeof *dt);
405: dt->_cookie = sc;
406: dt->_parent = pdt;
407: sc->sc_dmatag = dt;
408: return (dt);
409: }
410:
411: /*
412: * bus space support. <sparc64/dev/psychoreg.h> has a discussion
413: * about PCI physical addresses, which also applies to ebus.
414: */
415: static int
416: _ebus_bus_map(bus_space_tag_t t, bus_space_tag_t t0, bus_addr_t offset,
417: bus_size_t size, int flags, bus_space_handle_t *hp)
418: {
419: struct ebus_softc *sc = t->cookie;
420: struct ebus_ranges *range = sc->sc_range;
421: bus_addr_t hi, lo;
422: int i;
423:
424: DPRINTF(EDB_BUSMAP,
425: ("\n_ebus_bus_map: type %d off %016llx sz %x flags %d",
426: (int)t->default_type, (unsigned long long)offset, (int)size,
427: (int)flags));
428:
429: if (t->parent == 0 || t->parent->sparc_bus_map == 0) {
430: printf("\n_ebus_bus_map: invalid parent");
431: return (EINVAL);
432: }
433:
434: t = t->parent;
435:
436: if (flags & BUS_SPACE_MAP_PROMADDRESS) {
437: return ((*t->sparc_bus_map)
438: (t, t0, offset, size, flags, hp));
439: }
440:
441: hi = offset >> 32UL;
442: lo = offset & 0xffffffff;
443:
444: DPRINTF(EDB_BUSMAP, (" (hi %08x lo %08x)", (u_int)hi, (u_int)lo));
445: for (i = 0; i < sc->sc_nrange; i++) {
446: bus_addr_t pciaddr;
447:
448: if (hi != range[i].child_hi)
449: continue;
450: if (lo < range[i].child_lo ||
451: (lo + size) > (range[i].child_lo + range[i].size))
452: continue;
453:
454: if(((range[i].phys_hi >> 24) & 3) != t->default_type)
455: continue;
456:
457: pciaddr = ((bus_addr_t)range[i].phys_mid << 32UL) |
458: range[i].phys_lo;
459: pciaddr += lo;
460: DPRINTF(EDB_BUSMAP,
461: ("\n_ebus_bus_map: mapping space %x paddr offset %qx "
462: "pciaddr %qx\n", (int)t->default_type,
463: (unsigned long long)offset, (unsigned long long)pciaddr));
464: return ((*t->sparc_bus_map)(t, t0, pciaddr, size, flags, hp));
465: }
466: DPRINTF(EDB_BUSMAP, (": FAILED\n"));
467: return (EINVAL);
468: }
469:
470: static paddr_t
471: ebus_bus_mmap(bus_space_tag_t t, bus_space_tag_t t0, bus_addr_t paddr,
472: off_t off, int prot, int flags)
473: {
474: bus_addr_t offset = paddr;
475: struct ebus_softc *sc = t->cookie;
476: struct ebus_ranges *range = sc->sc_range;
477: int i;
478:
479: if (t->parent == 0 || t->parent->sparc_bus_mmap == 0) {
480: printf("\nebus_bus_mmap: invalid parent");
481: return (-1);
482: }
483:
484: t = t->parent;
485:
486: for (i = 0; i < sc->sc_nrange; i++) {
487: bus_addr_t paddr = ((bus_addr_t)range[i].child_hi << 32) |
488: range[i].child_lo;
489:
490: if (offset != paddr)
491: continue;
492:
493: DPRINTF(EDB_BUSMAP, ("\n_ebus_bus_mmap: mapping paddr %qx\n",
494: (unsigned long long)paddr));
495: return ((*t->sparc_bus_mmap)(t, t0, paddr, off, prot, flags));
496: }
497:
498: return (-1);
499: }
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