Annotation of sys/arch/vax/vsa/vsbus.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: vsbus.c,v 1.18 2006/12/13 21:12:06 miod Exp $ */
2: /* $NetBSD: vsbus.c,v 1.29 2000/06/29 07:14:37 mrg Exp $ */
3: /*
4: * Copyright (c) 1996, 1999 Ludd, University of Lule}, Sweden.
5: * All rights reserved.
6: *
7: * This code is derived from software contributed to Ludd by Bertram Barth.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. All advertising materials mentioning features or use of this software
18: * must display the following acknowledgement:
19: * This product includes software developed at Ludd, University of
20: * Lule}, Sweden and its contributors.
21: * 4. The name of the author may not be used to endorse or promote products
22: * derived from this software without specific prior written permission
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34: */
35:
36: #include <sys/param.h>
37: #include <sys/systm.h>
38: #include <sys/buf.h>
39: #include <sys/conf.h>
40: #include <sys/file.h>
41: #include <sys/ioctl.h>
42: #include <sys/proc.h>
43: #include <sys/user.h>
44: #include <sys/device.h>
45: #include <sys/dkstat.h>
46: #include <sys/disklabel.h>
47: #include <sys/syslog.h>
48: #include <sys/stat.h>
49:
50: #include <uvm/uvm_extern.h>
51:
52: #define _VAX_BUS_DMA_PRIVATE
53: #include <machine/bus.h>
54: #include <machine/pte.h>
55: #include <machine/sid.h>
56: #include <machine/scb.h>
57: #include <machine/cpu.h>
58: #include <machine/trap.h>
59: #include <machine/nexus.h>
60:
61: #include <machine/uvax.h>
62: #include <machine/ka410.h>
63: #include <machine/ka420.h>
64:
65: #include <machine/vsbus.h>
66:
67: int vsbus_match(struct device *, struct cfdata *, void *);
68: void vsbus_attach(struct device *, struct device *, void *);
69: int vsbus_print(void *, const char *);
70: int vsbus_search(struct device *, void *, void *);
71:
72: static struct vax_bus_dma_tag vsbus_bus_dma_tag = {
73: 0,
74: 0,
75: 0,
76: 0,
77: 0,
78: 0,
79: _bus_dmamap_create,
80: _bus_dmamap_destroy,
81: _bus_dmamap_load,
82: _bus_dmamap_load_mbuf,
83: _bus_dmamap_load_uio,
84: _bus_dmamap_load_raw,
85: _bus_dmamap_unload,
86: _bus_dmamap_sync,
87: _bus_dmamem_alloc,
88: _bus_dmamem_free,
89: _bus_dmamem_map,
90: _bus_dmamem_unmap,
91: _bus_dmamem_mmap,
92: };
93:
94: extern struct vax_bus_space vax_mem_bus_space;
95: static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma;
96:
97: struct cfattach vsbus_ca = {
98: sizeof(struct vsbus_softc), (cfmatch_t)vsbus_match, vsbus_attach
99: };
100:
101: struct cfdriver vsbus_cd = {
102: NULL, "vsbus", DV_DULL
103: };
104:
105: int oldvsbus;
106:
107: int
108: vsbus_print(aux, name)
109: void *aux;
110: const char *name;
111: {
112: struct vsbus_attach_args *va = aux;
113:
114: printf(" csr 0x%lx vec %d ipl %x maskbit %d", va->va_paddr,
115: va->va_cvec & 511, va->va_br, va->va_maskno - 1);
116: return(UNCONF);
117: }
118:
119: int
120: vsbus_match(parent, cf, aux)
121: struct device *parent;
122: struct cfdata *cf;
123: void *aux;
124: {
125: struct mainbus_attach_args *maa = aux;
126:
127: if (maa->maa_bustype == VAX_VSBUS)
128: return 1;
129: return 0;
130: }
131:
132: void
133: vsbus_attach(parent, self, aux)
134: struct device *parent, *self;
135: void *aux;
136: {
137: struct vsbus_softc *sc = (void *)self;
138: int dbase, dsize;
139:
140: printf("\n");
141:
142: sc->sc_dmatag = vsbus_bus_dma_tag;
143:
144: switch (vax_boardtype) {
145: #if VAX49 || VAX53
146: case VAX_BTYP_1303:
147: case VAX_BTYP_49:
148: sc->sc_vsregs = vax_map_physmem(0x25c00000, 1);
149: sc->sc_intreq = (char *)sc->sc_vsregs + 12;
150: sc->sc_intclr = (char *)sc->sc_vsregs + 12;
151: sc->sc_intmsk = (char *)sc->sc_vsregs + 8;
152: vsbus_dma_init(sc, 8192);
153: break;
154: #endif
155:
156: #if VAX46 || VAX48
157: case VAX_BTYP_48:
158: case VAX_BTYP_46:
159: sc->sc_vsregs = vax_map_physmem(VS_REGS, 1);
160: sc->sc_intreq = (char *)sc->sc_vsregs + 15;
161: sc->sc_intclr = (char *)sc->sc_vsregs + 15;
162: sc->sc_intmsk = (char *)sc->sc_vsregs + 12;
163: vsbus_dma_init(sc, 32768);
164: break;
165: #endif
166:
167: default:
168: sc->sc_vsregs = vax_map_physmem(VS_REGS, 1);
169: sc->sc_intreq = (char *)sc->sc_vsregs + 15;
170: sc->sc_intclr = (char *)sc->sc_vsregs + 15;
171: sc->sc_intmsk = (char *)sc->sc_vsregs + 12;
172: if (vax_boardtype == VAX_BTYP_410) {
173: dbase = KA410_DMA_BASE;
174: dsize = KA410_DMA_SIZE;
175: } else {
176: dbase = KA420_DMA_BASE;
177: dsize = KA420_DMA_SIZE;
178: *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */
179: }
180: sc->sc_dmasize = dsize;
181: sc->sc_dmaaddr = uvm_km_valloc(kernel_map, dsize);
182: ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG);
183: break;
184: }
185:
186: SIMPLEQ_INIT(&vsbus_dma);
187: /*
188: * First: find which interrupts we won't care about.
189: * There are interrupts that interrupt on a periodic basic
190: * that we don't want to interfere with the rest of the
191: * interrupt probing.
192: */
193: *sc->sc_intmsk = 0;
194: *sc->sc_intclr = 0xff;
195: DELAY(1000000); /* Wait a second */
196: sc->sc_mask = *sc->sc_intreq;
197:
198: #if VAX48
199: /*
200: * It's possible for the 4000/VLC to generate an DZ-11 rx interrupt
201: * (0x20) during the delay period, unmask that bit.
202: */
203: if (vax_boardtype == VAX_BTYP_48)
204: sc->sc_mask &= ~0x20;
205: #endif
206:
207: printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask);
208:
209: /*
210: * now check for all possible devices on this "bus"
211: */
212: config_search(vsbus_search, self, NULL);
213:
214: /* Autoconfig finished, enable interrupts */
215: *sc->sc_intmsk = ~sc->sc_mask;
216: }
217:
218: int
219: vsbus_search(parent, cfd, aux)
220: struct device *parent;
221: void *cfd;
222: void *aux;
223: {
224: struct vsbus_softc *sc = (void *)parent;
225: struct vsbus_attach_args va;
226: struct cfdata *cf = cfd;
227: int i, vec, br;
228: u_char c;
229:
230: va.va_paddr = cf->cf_loc[0];
231: va.va_addr = vax_map_physmem(va.va_paddr, 1);
232: va.va_dmat = &sc->sc_dmatag;
233: va.va_iot = &vax_mem_bus_space;
234:
235: *sc->sc_intmsk = 0;
236: *sc->sc_intclr = 0xff;
237: scb_vecref(0, 0); /* Clear vector ref */
238:
239: i = (*cf->cf_attach->ca_match) (parent, cf, &va);
240: vax_unmap_physmem(va.va_addr, 1);
241: c = *sc->sc_intreq & ~sc->sc_mask;
242:
243: if (i == 0)
244: goto forgetit;
245: if (i > 10)
246: c = sc->sc_mask; /* Fooling interrupt */
247: else if (c == 0)
248: goto forgetit;
249:
250: *sc->sc_intmsk = c;
251: DELAY(1000);
252: *sc->sc_intmsk = 0;
253: va.va_maskno = ffs((u_int)c);
254: i = scb_vecref(&vec, &br);
255: if (i == 0)
256: goto fail;
257: if (vec == 0)
258: goto fail;
259:
260: /*
261: * For proper splassert operation, we need to know if we are on
262: * a vsbus system where its devices interrupt at level 0x14 instead
263: * of 0x15.
264: */
265: if (br == 0x14)
266: oldvsbus = 1;
267:
268: va.va_br = br;
269: va.va_cvec = vec;
270: va.va_dmaaddr = sc->sc_dmaaddr;
271: va.va_dmasize = sc->sc_dmasize;
272: *sc->sc_intmsk = c; /* Allow interrupts during attach */
273: config_attach(parent, cf, &va, vsbus_print);
274: *sc->sc_intmsk = 0;
275: return 0;
276:
277: fail:
278: printf("%s%d at %s csr 0x%x %s\n",
279: cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname,
280: cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt"));
281: forgetit:
282: return 0;
283: }
284:
285: /*
286: * Sets a new interrupt mask. Returns the old one.
287: * Works like spl functions.
288: */
289: unsigned char
290: vsbus_setmask(mask)
291: unsigned char mask;
292: {
293: struct vsbus_softc *sc;
294: unsigned char ch;
295:
296: if (vsbus_cd.cd_ndevs == 0)
297: return 0;
298: sc = vsbus_cd.cd_devs[0];
299:
300: ch = *sc->sc_intmsk;
301: *sc->sc_intmsk = mask;
302: return ch;
303: }
304:
305: /*
306: * Clears the interrupts in mask.
307: */
308: void
309: vsbus_clrintr(mask)
310: unsigned char mask;
311: {
312: struct vsbus_softc *sc;
313:
314: if (vsbus_cd.cd_ndevs == 0)
315: return;
316: sc = vsbus_cd.cd_devs[0];
317:
318: *sc->sc_intclr = mask;
319: }
320:
321: /*
322: * Copy data from/to a user process' space from the DMA area.
323: * Use the physical memory directly.
324: */
325: void
326: vsbus_copytoproc(struct proc *p, caddr_t from, caddr_t to, int len)
327: {
328: pt_entry_t *pte;
329: paddr_t pa;
330:
331: if ((vaddr_t)to & KERNBASE) { /* In kernel space */
332: bcopy(from, to, len);
333: return;
334: }
335: pte = uvtopte(TRUNC_PAGE(to), (&p->p_addr->u_pcb));
336: if ((vaddr_t)to & PGOFSET) {
337: int cz = ROUND_PAGE(to) - (vaddr_t)to;
338:
339: pa = ((*pte & PG_FRAME) << VAX_PGSHIFT) |
340: (NBPG - cz) | KERNBASE;
341: bcopy(from, (caddr_t)pa, min(cz, len));
342: from += cz;
343: to += cz;
344: len -= cz;
345: pte += 8; /* XXX */
346: }
347: while (len > 0) {
348: pa = ((*pte & PG_FRAME) << VAX_PGSHIFT) | KERNBASE;
349: bcopy(from, (caddr_t)pa, min(NBPG, len));
350: from += NBPG;
351: to += NBPG;
352: len -= NBPG;
353: pte += 8; /* XXX */
354: }
355: }
356:
357: void
358: vsbus_copyfromproc(struct proc *p, caddr_t from, caddr_t to, int len)
359: {
360: pt_entry_t *pte;
361: paddr_t pa;
362:
363: if ((vaddr_t)from & KERNBASE) { /* In kernel space */
364: bcopy(from, to, len);
365: return;
366: }
367: pte = uvtopte(TRUNC_PAGE(from), (&p->p_addr->u_pcb));
368: if ((vaddr_t)from & PGOFSET) {
369: int cz = ROUND_PAGE(from) - (vaddr_t)from;
370:
371: pa = ((*pte & PG_FRAME) << VAX_PGSHIFT) |
372: (NBPG - cz) | KERNBASE;
373: bcopy((caddr_t)pa, to, min(cz, len));
374: from += cz;
375: to += cz;
376: len -= cz;
377: pte += 8; /* XXX */
378: }
379: while (len > 0) {
380: pa = ((*pte & PG_FRAME) << VAX_PGSHIFT) | KERNBASE;
381: bcopy((caddr_t)pa, to, min(NBPG, len));
382: from += NBPG;
383: to += NBPG;
384: len -= NBPG;
385: pte += 8; /* XXX */
386: }
387: }
388:
389: /*
390: * There can only be one user of the DMA area on VS2k/VS3100 at one
391: * time, so keep track of it here.
392: */
393: static int vsbus_active = 0;
394:
395: void
396: vsbus_dma_start(struct vsbus_dma *vd)
397: {
398:
399: SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q);
400:
401: if (vsbus_active == 0)
402: vsbus_dma_intr();
403: }
404:
405: void
406: vsbus_dma_intr(void)
407: {
408: struct vsbus_dma *vd;
409:
410: vd = SIMPLEQ_FIRST(&vsbus_dma);
411: if (vd == NULL) {
412: vsbus_active = 0;
413: return;
414: }
415: vsbus_active = 1;
416: SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q);
417: (*vd->vd_go)(vd->vd_arg);
418: }
419:
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