sii_ds.c revision 1.8 
1/*	$NetBSD: sii_ds.c,v 1.8 2011/06/04 01:31:23 tsutsui Exp $	*/
2
3/*
4 * Copyright 1996 The Board of Trustees of The Leland Stanford
5 * Junior University. All Rights Reserved.
6 *
7 * Permission to use, copy, modify, and distribute this
8 * software and its documentation for any purpose and without
9 * fee is hereby granted, provided that the above copyright
10 * notice appear in all copies.  Stanford University
11 * makes no representations about the suitability of this
12 * software for any purpose.  It is provided "as is" without
13 * express or implied warranty.
14 *
15 * this driver contributed by Jonathan Stone
16 */
17
18#include <sys/cdefs.h>
19__KERNEL_RCSID(0, "$NetBSD: sii_ds.c,v 1.8 2011/06/04 01:31:23 tsutsui Exp $");
20
21#include "sii.h"
22
23#include <sys/param.h>
24#include <sys/systm.h>
25#include <sys/device.h>
26#include <sys/buf.h>
27
28#include <machine/locore.h>
29
30#include <dev/scsipi/scsi_all.h>
31#include <dev/scsipi/scsipi_all.h>
32#include <dev/scsipi/scsiconf.h>
33#include <dev/scsipi/scsi_message.h>
34
35#include <machine/bus.h>
36#include <pmax/ibus/siireg.h>
37#include <pmax/ibus/siivar.h>
38
39#include <pmax/ibus/ibusvar.h>		/* interrupt etablish */
40
41#include <pmax/pmax/kn01.h>		/* kn01 (ds3100) address constants */
42#include <pmax/pmax/pmaxtype.h>
43
44
45static void	kn230_copytobuf(u_short *src, 	/* NB: must be short aligned */
46		    volatile u_short *dst, int length);
47static void	kn230_copyfrombuf(volatile u_short *src, char *dst,
48		    int length);
49
50static void	kn01_copytobuf(u_short *src, 	/* NB: must be short aligned */
51		    volatile u_short *dst, int length);
52static void	kn01_copyfrombuf(volatile u_short *src, char *dst,
53		    int length);
54
55/*
56 * Autoconfig definition of driver front-end
57 */
58static int	sii_ds_match(device_t, struct cfdata *, void *);
59static void	sii_ds_attach(device_t, device_t, void *);
60
61CFATTACH_DECL_NEW(sii_ds, sizeof(struct siisoftc),
62    sii_ds_match, sii_ds_attach, NULL, NULL);
63
64/* define a safe address in the SCSI buffer for doing status & message DMA */
65#define SII_BUF_ADDR	(MIPS_PHYS_TO_KSEG1(KN01_SYS_SII_B_START) \
66		+ SII_MAX_DMA_XFER_LENGTH * 14)
67
68/*
69 * Match driver on Decstation (2100, 3100, 5100) based on name and probe.
70 */
71static int
72sii_ds_match(device_t parent, cfdata_t cf, void *aux)
73{
74	struct ibus_attach_args *ia = aux;
75	void *siiaddr;
76
77	if (strcmp(ia->ia_name, "sii") != 0)
78		return (0);
79	siiaddr = (void *)ia->ia_addr;
80	if (badaddr(siiaddr, 4))
81		return (0);
82	return (1);
83}
84
85static void
86sii_ds_attach(device_t parent, device_t self, void *aux)
87{
88	struct ibus_attach_args *ia = aux;
89	struct siisoftc *sc = device_private(self);
90
91	sc->sc_dev = self;
92	sc->sc_regs = (SIIRegs *)MIPS_PHYS_TO_KSEG1(ia->ia_addr);
93
94	/* set up scsi buffer.  XXX Why statically allocated? */
95	sc->sc_buf = (void*)(MIPS_PHYS_TO_KSEG1(KN01_SYS_SII_B_START));
96
97	if (systype == DS_PMAX) {
98#if 0
99		sc->sii_copytobuf = CopyToBuffer;
100		sc->sii_copyfrombuf = CopyFromBuffer;
101#else
102		sc->sii_copytobuf = kn01_copytobuf;
103		sc->sii_copyfrombuf = kn01_copyfrombuf;
104#endif
105	} else {
106		sc->sii_copytobuf = kn230_copytobuf;
107		sc->sii_copyfrombuf = kn230_copyfrombuf;
108	}
109
110	/* Do the common parts of attachment. */
111	sc->sc_adapter.adapt_request = sii_scsi_request;
112	sc->sc_adapter.adapt_minphys = minphys;
113	siiattach(sc);
114
115	/* tie pseudo-slot to device */
116	ibus_intr_establish(parent, (void*)ia->ia_cookie, IPL_BIO, siiintr, sc);
117}
118
119
120/*
121 * Padded DMA copy functions
122 *
123 */
124
125/*
126 * XXX assumes src is always 32-bit aligned.
127 * currently safe on sii driver, but API and casts should be changed.
128 */
129static void
130kn230_copytobuf(u_short *src, volatile u_short *dst, int len)
131{
132	u_int *wsrc = (u_int *)src;
133	volatile u_int *wdst = (volatile u_int *)dst;
134	int i, n;
135
136#if defined(DIAGNOSTIC) || defined(DEBUG)
137	if ((u_int)(src) & 0x3) {
138		printf("kn230: copytobuf, src %p misaligned\n",  src);
139	}
140	if ((u_int)(dst) & 0x3) {
141		printf("kn230: copytobuf, dst %p misaligned\n",  dst);
142	}
143#endif
144
145	/* DMA buffer is allocated in 32-bit words, so just copy words. */
146	n = len / 4;
147	if (len & 0x3)
148		n++;
149	for (i = 0; i < n; i++) {
150		*wdst = *wsrc;
151		wsrc++;
152		wdst+= 2;
153	}
154
155	wbflush();		/* XXX not necessary? */
156}
157
158
159/*
160 * XXX assumes dst is always 32-bit aligned.
161 * currently safe on sii driver, but API and casts should be changed.
162 */
163static void
164kn230_copyfrombuf(volatile u_short *src, char *dst, int len)
165	/* dst:		 XXX assume 32-bit aligned? */
166{
167	volatile u_int *wsrc = (volatile u_int *)src;
168	u_int *wdst = (u_int *)dst;
169	int i, n;
170
171#if defined(DIAGNOSTIC) || defined(DEBUG)
172	if ((u_int)(src) & 0x3) {
173		printf("kn230: copyfrombuf, src %p misaligned\n",  src);
174	}
175	if ((u_int)(dst) & 0x3) {
176		printf("kn230: copyfrombuf, dst %p misaligned\n",  dst);
177	}
178#endif
179
180	n = len / 4;
181
182	for (i = 0; i < n; i++) {
183		*wdst = *wsrc;
184		wsrc += 2;
185		wdst++;
186	}
187
188	if (len & 0x3) {
189		u_int lastword = *wsrc;
190
191		if (len & 0x2)
192		    *((u_short*)(wdst)) = (u_short) (lastword);
193
194		if (len & 0x1)
195		    ((u_char*)(wdst))[2] = (u_char) (lastword >> 16);
196	}
197
198	wbflush();		/* XXX not necessary? */
199}
200
201
202static void
203kn01_copytobuf(u_short *src, volatile u_short *dst, int len)
204{
205#if defined(DIAGNOSTIC) || defined(DEBUG)
206	if ((u_int)(src) & 0x3) {
207		printf("kn01: copytobuf, src %p misaligned\n",  src);
208	}
209	if ((u_int)(dst) & 0x3) {
210		printf("kn01: copytobuf, dst %p misaligned\n",  dst);
211	}
212#endif
213
214	CopyToBuffer(src, dst, len);
215}
216
217static void
218kn01_copyfrombuf(volatile u_short *src, char *dst, int len)
219	/* dst:		 XXX assume 32-bit aligned? */
220{
221#if defined(DIAGNOSTIC) || defined(DEBUG)
222	if ((u_int)(src) & 0x3) {
223		printf("kn01: copyfrombuf, src %p misaligned\n",  src);
224	}
225	if ((u_int)(dst) & 0x3) {
226		printf("kn01: copyfrombuf, dst %p misaligned\n",  dst);
227	}
228
229#endif
230	CopyFromBuffer(src, dst, len);
231
232}
233